diff --git a/be/apps/core/src/app.factory.ts b/be/apps/core/src/app.factory.ts
index a3cfca2e..dfa3f622 100644
--- a/be/apps/core/src/app.factory.ts
+++ b/be/apps/core/src/app.factory.ts
@@ -2,7 +2,8 @@ import 'reflect-metadata'
 
 import { env } from '@afilmory/env'
 import type { HonoHttpApplication } from '@afilmory/framework'
-import { createApplication, createZodValidationPipe } from '@afilmory/framework'
+import { createApplication, createLogger, createZodValidationPipe, HttpException } from '@afilmory/framework'
+import { BizException } from 'core/errors'
 
 import { PgPoolProvider } from './database/database.provider'
 import { AllExceptionsFilter } from './filters/all-exceptions.filter'
@@ -27,11 +28,15 @@ const GlobalValidationPipe = createZodValidationPipe({
   stopAtFirstError: true,
 })
 
+const honoErrorLogger = createLogger('HonoErrorHandler')
+
 export async function createConfiguredApp(options: BootstrapOptions = {}): Promise<HonoHttpApplication> {
   const app = await createApplication(AppModules, {
     globalPrefix: options.globalPrefix ?? '/api',
   })
 
+  const container = app.getContainer()
+
   app.useGlobalFilters(new AllExceptionsFilter())
   app.useGlobalInterceptors(new LoggingInterceptor())
   app.useGlobalInterceptors(new ResponseTransformInterceptor())
@@ -39,7 +44,6 @@ export async function createConfiguredApp(options: BootstrapOptions = {}): Promi
   app.useGlobalPipes(new GlobalValidationPipe())
 
   // Warm up DB connection during bootstrap
-  const container = app.getContainer()
   const poolProvider = container.resolve(PgPoolProvider)
   await poolProvider.warmup()
 
@@ -49,5 +53,55 @@ export async function createConfiguredApp(options: BootstrapOptions = {}): Promi
 
   registerOpenApiRoutes(app.getInstance(), { globalPrefix: options.globalPrefix ?? '/api' })
 
+  const hono = app.getInstance()
+  hono.onError((error, context) => {
+    if (error instanceof BizException) {
+      return new Response(JSON.stringify(error.toResponse()), {
+        status: error.getHttpStatus(),
+        headers: {
+          'content-type': 'application/json',
+        },
+      })
+    }
+
+    if (error instanceof HttpException) {
+      return new Response(JSON.stringify(error.getResponse()), {
+        status: error.getStatus(),
+        headers: {
+          'content-type': 'application/json',
+        },
+      })
+    }
+
+    if (typeof error === 'object' && error !== null && 'statusCode' in error) {
+      const statusCode =
+        typeof (error as { statusCode?: number }).statusCode === 'number'
+          ? (error as { statusCode?: number }).statusCode!
+          : 500
+
+      return new Response(JSON.stringify(error), {
+        status: statusCode,
+        headers: {
+          'content-type': 'application/json',
+        },
+      })
+    }
+
+    honoErrorLogger.error(`Unhandled error ${context.req.method} ${context.req.url}`, error)
+
+    return new Response(
+      JSON.stringify({
+        statusCode: 500,
+        message: 'Internal server error',
+      }),
+      {
+        status: 500,
+        headers: {
+          'content-type': 'application/json',
+        },
+      },
+    )
+  })
+
   return app
 }
diff --git a/be/apps/core/src/guards/auth.guard.ts b/be/apps/core/src/guards/auth.guard.ts
index 4432f2e3..6e0c19fb 100644
--- a/be/apps/core/src/guards/auth.guard.ts
+++ b/be/apps/core/src/guards/auth.guard.ts
@@ -1,90 +1,157 @@
-import { authUsers } from '@afilmory/db'
+import { authUsers, tenantAuthUsers } from '@afilmory/db'
 import type { CanActivate, ExecutionContext } from '@afilmory/framework'
 import { HttpContext } from '@afilmory/framework'
 import type { Session } from 'better-auth'
 import { applyTenantIsolationContext, DbAccessor } from 'core/database/database.provider'
 import { BizException, ErrorCode } from 'core/errors'
 import { getTenantContext } from 'core/modules/tenant/tenant.context'
-import { TenantService } from 'core/modules/tenant/tenant.service'
+import { TenantContextResolver } from 'core/modules/tenant/tenant-context-resolver.service'
 import { eq } from 'drizzle-orm'
 import { injectable } from 'tsyringe'
 
+import { logger } from '../helpers/logger.helper'
 import type { AuthSession } from '../modules/auth/auth.provider'
 import { AuthProvider } from '../modules/auth/auth.provider'
+import type { TenantAuthSession } from '../modules/tenant-auth/tenant-auth.provider'
+import { TenantAuthProvider } from '../modules/tenant-auth/tenant-auth.provider'
 import { getAllowedRoleMask, roleNameToBit } from './roles.decorator'
 
 declare module '@afilmory/framework' {
   interface HttpContextValues {
     auth?: {
-      user?: AuthSession['user']
+      user?: AuthSession['user'] | TenantAuthSession['user']
       session?: Session
+      source?: 'global' | 'tenant'
     }
   }
 }
 
 @injectable()
 export class AuthGuard implements CanActivate {
+  private readonly log = logger.extend('AuthGuard')
+
   constructor(
     private readonly authProvider: AuthProvider,
+    private readonly tenantAuthProvider: TenantAuthProvider,
     private readonly dbAccessor: DbAccessor,
-    private readonly tenantService: TenantService,
+    private readonly tenantContextResolver: TenantContextResolver,
   ) {}
 
   async canActivate(context: ExecutionContext): Promise<boolean> {
     const store = context.getContext()
     const { hono } = store
+    const { method, path } = hono.req
 
-    const auth = await this.authProvider.getAuth()
+    if (this.isPublicRoute(method, path)) {
+      this.log.verbose(`Bypass guard for public route ${method} ${path}`)
+      return true
+    }
 
-    const session = await auth.api.getSession({ headers: hono.req.raw.headers })
+    this.log.verbose(`Evaluating guard for ${method} ${path}`)
 
     let tenantContext = getTenantContext()
-    if (!tenantContext) {
-      tenantContext = await this.tenantService.resolve({ fallbackToPrimary: true })
-      HttpContext.assign({ tenant: tenantContext })
-    }
 
     if (!tenantContext) {
-      throw new BizException(ErrorCode.TENANT_NOT_FOUND)
+      const resolvedTenant = await this.tenantContextResolver.resolve(hono, {
+        setResponseHeaders: false,
+      })
+      if (resolvedTenant) {
+        HttpContext.setValue('tenant', resolvedTenant)
+        tenantContext = resolvedTenant
+        this.log.verbose(
+          `Resolved tenant context slug=${resolvedTenant.tenant.slug ?? 'n/a'} id=${resolvedTenant.tenant.id} for ${method} ${path}`,
+        )
+      } else {
+        this.log.verbose(`Tenant context not resolved for ${method} ${path}`)
+        tenantContext = undefined
+      }
     }
 
-    if (session) {
+    const { headers } = hono.req.raw
+
+    const globalAuth = this.authProvider.getAuth()
+    let sessionSource: 'global' | 'tenant' | null = null
+    let authSession: AuthSession | TenantAuthSession | null = await globalAuth.api.getSession({ headers })
+
+    if (authSession) {
+      sessionSource = 'global'
+      this.log.verbose(`Global session detected for user ${(authSession.user as { id?: string }).id ?? 'unknown'}`)
+    } else if (tenantContext) {
+      const tenantAuth = await this.tenantAuthProvider.getAuth(tenantContext.tenant.id)
+      authSession = await tenantAuth.api.getSession({ headers })
+      if (authSession) {
+        sessionSource = 'tenant'
+        this.log.verbose(
+          `Tenant session detected for user ${(authSession.user as { id?: string }).id ?? 'unknown'} on tenant ${tenantContext.tenant.id}`,
+        )
+      } else {
+        this.log.verbose(`No tenant session present for tenant ${tenantContext.tenant.id}`)
+      }
+    } else {
+      this.log.verbose('No session context available (no tenant resolved and no global session)')
+    }
+
+    if (authSession) {
       HttpContext.assign({
         auth: {
-          user: session.user,
-          session: session.session,
+          user: authSession.user,
+          session: authSession.session,
+          source: sessionSource ?? undefined,
         },
       })
-
-      const roleName = session.user.role as 'user' | 'admin' | 'superadmin' | undefined
-      const isSuperAdmin = roleName === 'superadmin'
-      let sessionTenantId = session.user?.tenantId
+      const userRoleValue = (authSession.user as { role?: string }).role
+      const roleName = userRoleValue as 'user' | 'admin' | 'superadmin' | 'guest' | undefined
+      const isGlobalSession = sessionSource === 'global'
+      const isSuperAdmin = isGlobalSession && roleName === 'superadmin'
+      let sessionTenantId = (authSession.user as { tenantId?: string | null }).tenantId ?? null
 
       if (!isSuperAdmin) {
         if (!sessionTenantId) {
           const db = this.dbAccessor.get()
-          const [record] = await db
-            .select({ tenantId: authUsers.tenantId })
-            .from(authUsers)
-            .where(eq(authUsers.id, session.user.id))
-            .limit(1)
-
-          sessionTenantId = record?.tenantId ?? ''
+          if (sessionSource === 'tenant') {
+            const [record] = await db
+              .select({ tenantId: tenantAuthUsers.tenantId })
+              .from(tenantAuthUsers)
+              .where(eq(tenantAuthUsers.id, authSession.user.id))
+              .limit(1)
+            sessionTenantId = record?.tenantId ?? ''
+          } else {
+            const [record] = await db
+              .select({ tenantId: authUsers.tenantId })
+              .from(authUsers)
+              .where(eq(authUsers.id, authSession.user.id))
+              .limit(1)
+            sessionTenantId = record?.tenantId ?? ''
+          }
         }
 
         if (!sessionTenantId) {
+          this.log.warn(
+            `Denied access: session ${(authSession.user as { id?: string }).id ?? 'unknown'} missing tenant id for ${method} ${path}`,
+          )
           throw new BizException(ErrorCode.AUTH_FORBIDDEN)
         }
 
+        if (!tenantContext) {
+          this.log.warn(
+            `Denied access: tenant context missing while session tenant=${sessionTenantId} accessing ${method} ${path}`,
+          )
+          throw new BizException(ErrorCode.AUTH_FORBIDDEN)
+        }
         if (sessionTenantId !== tenantContext.tenant.id) {
+          this.log.warn(
+            `Denied access: session tenant=${sessionTenantId} does not match context tenant=${tenantContext.tenant.id} for ${method} ${path}`,
+          )
           throw new BizException(ErrorCode.AUTH_FORBIDDEN)
         }
       }
 
-      await applyTenantIsolationContext({
-        tenantId: tenantContext.tenant.id,
-        isSuperAdmin,
-      })
+      if (tenantContext) {
+        await applyTenantIsolationContext({
+          tenantId: tenantContext.tenant.id,
+          isSuperAdmin,
+        })
+      }
 
       if (isSuperAdmin) {
         return true
@@ -94,17 +161,38 @@ export class AuthGuard implements CanActivate {
     const handler = context.getHandler()
     const requiredMask = getAllowedRoleMask(handler)
     if (requiredMask > 0) {
-      if (!session) {
+      if (!authSession) {
+        this.log.warn(`Denied access: missing session for protected resource ${method} ${path}`)
         throw new BizException(ErrorCode.AUTH_UNAUTHORIZED)
       }
 
-      const userRoleName = session.user.role as 'user' | 'admin' | 'superadmin' | undefined
+      const userRoleName = (authSession.user as { role?: string }).role as
+        | 'user'
+        | 'admin'
+        | 'superadmin'
+        | 'guest'
+        | undefined
       const userMask = userRoleName ? roleNameToBit(userRoleName) : 0
       const hasRole = (requiredMask & userMask) !== 0
       if (!hasRole) {
+        this.log.warn(
+          `Denied access: user ${(authSession.user as { id?: string }).id ?? 'unknown'} role=${userRoleName ?? 'n/a'} lacks permission mask=${requiredMask} on ${method} ${path}`,
+        )
         throw new BizException(ErrorCode.AUTH_FORBIDDEN)
       }
     }
     return true
   }
+
+  private isPublicRoute(method: string, path: string): boolean {
+    if (method !== 'POST') {
+      return false
+    }
+
+    if (path === '/api/auth/tenants/sign-up' || path.startsWith('/api/auth/tenants/sign-up/')) {
+      return true
+    }
+
+    return false
+  }
 }
diff --git a/be/apps/core/src/interceptors/tenant-resolver.decorator.ts b/be/apps/core/src/interceptors/tenant-resolver.decorator.ts
new file mode 100644
index 00000000..a0b6b950
--- /dev/null
+++ b/be/apps/core/src/interceptors/tenant-resolver.decorator.ts
@@ -0,0 +1,24 @@
+import type { TenantResolutionOptions } from '../modules/tenant/tenant-context-resolver.service'
+
+export const TENANT_RESOLUTION_OPTIONS = Symbol('core:tenantResolutionOptions')
+
+type DecoratorTarget = object | Function
+
+function setMetadata(target: DecoratorTarget, options: TenantResolutionOptions): void {
+  Reflect.defineMetadata(TENANT_RESOLUTION_OPTIONS, options, target)
+}
+
+export function TenantResolution(options: TenantResolutionOptions): ClassDecorator & MethodDecorator {
+  return ((
+    target: DecoratorTarget,
+    _propertyKey?: string | symbol,
+    descriptor?: PropertyDescriptor,
+  ): void | PropertyDescriptor => {
+    if (descriptor && descriptor.value) {
+      setMetadata(descriptor.value as DecoratorTarget, options)
+      return descriptor
+    }
+
+    setMetadata(target, options)
+  }) as unknown as ClassDecorator & MethodDecorator
+}
diff --git a/be/apps/core/src/interceptors/tenant-resolver.interceptor.ts b/be/apps/core/src/interceptors/tenant-resolver.interceptor.ts
new file mode 100644
index 00000000..7f3c6df2
--- /dev/null
+++ b/be/apps/core/src/interceptors/tenant-resolver.interceptor.ts
@@ -0,0 +1,54 @@
+import type { CallHandler, ExecutionContext, FrameworkResponse, Interceptor } from '@afilmory/framework'
+import { injectable } from 'tsyringe'
+
+import type { TenantResolutionOptions } from '../modules/tenant/tenant-context-resolver.service'
+import { TenantContextResolver } from '../modules/tenant/tenant-context-resolver.service'
+import { TENANT_RESOLUTION_OPTIONS } from './tenant-resolver.decorator'
+
+const DEFAULT_OPTIONS: Required<TenantResolutionOptions> = {
+  throwOnMissing: true,
+  setResponseHeaders: true,
+  skipInitializationCheck: false,
+}
+
+function getResolutionOptions(target: object | Function | undefined): TenantResolutionOptions | undefined {
+  if (!target) {
+    return undefined
+  }
+
+  try {
+    return Reflect.getMetadata(TENANT_RESOLUTION_OPTIONS, target) as TenantResolutionOptions | undefined
+  } catch {
+    return undefined
+  }
+}
+
+function mergeOptions(
+  classOptions: TenantResolutionOptions | undefined,
+  handlerOptions: TenantResolutionOptions | undefined,
+): TenantResolutionOptions {
+  return {
+    ...DEFAULT_OPTIONS,
+    ...classOptions,
+    ...handlerOptions,
+  }
+}
+
+@injectable()
+export class TenantResolverInterceptor implements Interceptor {
+  constructor(private readonly tenantContextResolver: TenantContextResolver) {}
+
+  async intercept(context: ExecutionContext, next: CallHandler): Promise<FrameworkResponse> {
+    const { hono } = context.getContext()
+    const handler = context.getHandler()
+    const clazz = context.getClass()
+
+    const classOptions = getResolutionOptions(clazz)
+    const handlerOptions = getResolutionOptions(handler)
+    const resolutionOptions = mergeOptions(classOptions, handlerOptions)
+
+    await this.tenantContextResolver.resolve(hono, resolutionOptions)
+
+    return await next.handle()
+  }
+}
diff --git a/be/apps/core/src/middlewares/cors.middleware.ts b/be/apps/core/src/middlewares/cors.middleware.ts
index 43645938..9006184f 100644
--- a/be/apps/core/src/middlewares/cors.middleware.ts
+++ b/be/apps/core/src/middlewares/cors.middleware.ts
@@ -1,14 +1,14 @@
 import type { HttpMiddleware, OnModuleDestroy, OnModuleInit } from '@afilmory/framework'
 import { EventEmitterService, Middleware } from '@afilmory/framework'
 import { OnboardingService } from 'core/modules/onboarding/onboarding.service'
-import type { Context, Next } from 'hono'
+import type { Context } from 'hono'
 import { cors } from 'hono/cors'
 import { injectable } from 'tsyringe'
 
 import { logger } from '../helpers/logger.helper'
 import { SettingService } from '../modules/setting/setting.service'
 import { getTenantContext } from '../modules/tenant/tenant.context'
-import { TenantService } from '../modules/tenant/tenant.service'
+import { TenantContextResolver } from '../modules/tenant/tenant-context-resolver.service'
 
 type AllowedOrigins = '*' | string[]
 
@@ -47,12 +47,11 @@ function parseAllowedOrigins(raw: string | null): AllowedOrigins {
 @injectable()
 export class CorsMiddleware implements HttpMiddleware, OnModuleInit, OnModuleDestroy {
   private readonly allowedOrigins = new Map<string, AllowedOrigins>()
-  private defaultTenantId?: string
   private readonly logger = logger.extend('CorsMiddleware')
   constructor(
     private readonly eventEmitter: EventEmitterService,
     private readonly settingService: SettingService,
-    private readonly tenantService: TenantService,
+    private readonly tenantContextResolver: TenantContextResolver,
     private readonly onboardingService: OnboardingService,
   ) {}
 
@@ -76,16 +75,6 @@ export class CorsMiddleware implements HttpMiddleware, OnModuleInit, OnModuleDes
   }
 
   async onModuleInit(): Promise<void> {
-    try {
-      const defaultTenant = await this.tenantService.resolve({ fallbackToPrimary: true }, true)
-      if (!defaultTenant) {
-        return
-      }
-      this.defaultTenantId = defaultTenant.tenant.id
-      await this.reloadAllowedOrigins(defaultTenant.tenant.id)
-    } catch (error) {
-      this.logger.warn('Failed to preload default tenant CORS configuration', error)
-    }
     this.eventEmitter.on('setting.updated', this.handleSettingUpdated)
     this.eventEmitter.on('setting.deleted', this.handleSettingDeleted)
   }
@@ -131,7 +120,7 @@ export class CorsMiddleware implements HttpMiddleware, OnModuleInit, OnModuleDes
     })
   }
 
-  async use(context: Context, next: Next): Promise<Response | void> {
+  ['use']: HttpMiddleware['use'] = async (context, next) => {
     const initialized = await this.onboardingService.isInitialized()
 
     if (!initialized) {
@@ -143,8 +132,12 @@ export class CorsMiddleware implements HttpMiddleware, OnModuleInit, OnModuleDes
       return await next()
     }
 
-    const tenantContext = getTenantContext()
-    const tenantId = tenantContext?.tenant.id ?? this.defaultTenantId
+    const tenantContext = await this.tenantContextResolver.resolve(context, {
+      setResponseHeaders: false,
+      skipInitializationCheck: true,
+    })
+
+    const tenantId = tenantContext?.tenant.id
 
     if (tenantId) {
       await this.ensureTenantOriginsLoaded(tenantId)
@@ -193,7 +186,7 @@ export class CorsMiddleware implements HttpMiddleware, OnModuleInit, OnModuleDes
     }
 
     const tenantContext = getTenantContext()
-    const tenantId = tenantContext?.tenant.id ?? this.defaultTenantId
+    const tenantId = tenantContext?.tenant.id
 
     if (!tenantId) {
       return null
diff --git a/be/apps/core/src/middlewares/tenant-resolver.middleware.ts b/be/apps/core/src/middlewares/tenant-resolver.middleware.ts
deleted file mode 100644
index f5ea2c8b..00000000
--- a/be/apps/core/src/middlewares/tenant-resolver.middleware.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import type { HttpMiddleware } from '@afilmory/framework'
-import { HttpContext, Middleware } from '@afilmory/framework'
-import type { Context, Next } from 'hono'
-import { injectable } from 'tsyringe'
-
-import { logger } from '../helpers/logger.helper'
-import { OnboardingService } from '../modules/onboarding/onboarding.service'
-import { TenantService } from '../modules/tenant/tenant.service'
-
-const HEADER_TENANT_ID = 'x-tenant-id'
-const HEADER_TENANT_SLUG = 'x-tenant-slug'
-
-@Middleware()
-@injectable()
-export class TenantResolverMiddleware implements HttpMiddleware {
-  private readonly log = logger.extend('TenantResolver')
-
-  constructor(
-    private readonly tenantService: TenantService,
-    private readonly onboardingService: OnboardingService,
-  ) {}
-
-  async use(context: Context, next: Next): Promise<Response | void> {
-    const { path } = context.req
-
-    // During onboarding (before any user/tenant exists), skip tenant resolution entirely
-    const initialized = await this.onboardingService.isInitialized()
-    if (!initialized) {
-      this.log.info(`Application not initialized yet, skip tenant resolution for ${path}`)
-      return await next()
-    }
-
-    const tenantContext = await this.resolveTenantContext(context)
-    HttpContext.assign({ tenant: tenantContext })
-
-    const response = await next()
-
-    context.header(HEADER_TENANT_ID, tenantContext.tenant.id)
-    context.header(HEADER_TENANT_SLUG, tenantContext.tenant.slug)
-
-    return response
-  }
-
-  private async resolveTenantContext(context: Context) {
-    const host = context.req.header('host')
-    const tenantId = context.req.header(HEADER_TENANT_ID)
-    const tenantSlug = context.req.header(HEADER_TENANT_SLUG)
-
-    this.log.debug(
-      `Resolve tenant for request ${context.req.method} ${context.req.path} (host=${host ?? 'n/a'}, id=${tenantId ?? 'n/a'}, slug=${tenantSlug ?? 'n/a'})`,
-    )
-
-    return await this.tenantService.resolve({
-      tenantId,
-      slug: tenantSlug,
-      domain: host,
-      fallbackToPrimary: true,
-    })
-  }
-}
diff --git a/be/apps/core/src/modules/auth/auth-registration.service.ts b/be/apps/core/src/modules/auth/auth-registration.service.ts
new file mode 100644
index 00000000..85f4441c
--- /dev/null
+++ b/be/apps/core/src/modules/auth/auth-registration.service.ts
@@ -0,0 +1,162 @@
+import { authUsers } from '@afilmory/db'
+import { BizException, ErrorCode } from 'core/errors'
+import { eq } from 'drizzle-orm'
+import { injectable } from 'tsyringe'
+
+import { DbAccessor } from '../../database/database.provider'
+import { SuperAdminSettingService } from '../system-setting/super-admin-setting.service'
+import { TenantRepository } from '../tenant/tenant.repository'
+import { TenantService } from '../tenant/tenant.service'
+import type { TenantRecord } from '../tenant/tenant.types'
+import { AuthProvider } from './auth.provider'
+
+type RegisterTenantAccountInput = {
+  email: string
+  password: string
+  name: string
+}
+
+type RegisterTenantInput = {
+  account: RegisterTenantAccountInput
+  tenant: {
+    name: string
+    slug?: string | null
+  }
+}
+
+export interface RegisterTenantResult {
+  response: Response
+  tenant?: TenantRecord
+  accountId?: string
+  success: boolean
+}
+
+function slugify(value: string): string {
+  return value
+    .normalize('NFKD')
+    .replaceAll(/[\u0300-\u036f]/g, '')
+    .toLowerCase()
+    .replaceAll(/[^a-z0-9]+/g, '-')
+    .replaceAll(/-{2,}/g, '-')
+    .replaceAll(/^-+|-+$/g, '')
+}
+
+@injectable()
+export class AuthRegistrationService {
+  constructor(
+    private readonly authProvider: AuthProvider,
+    private readonly tenantService: TenantService,
+    private readonly tenantRepository: TenantRepository,
+    private readonly superAdminSettings: SuperAdminSettingService,
+    private readonly dbAccessor: DbAccessor,
+  ) {}
+
+  async registerTenant(input: RegisterTenantInput, headers: Headers): Promise<RegisterTenantResult> {
+    await this.superAdminSettings.ensureRegistrationAllowed()
+
+    const accountEmail = input.account.email.trim().toLowerCase()
+    const accountPassword = input.account.password
+    const accountName = input.account.name.trim() || accountEmail
+
+    if (!accountEmail) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '邮箱不能为空' })
+    }
+
+    if (accountPassword.trim().length < 8) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, {
+        message: '密码长度至少需要 8 个字符',
+      })
+    }
+
+    const tenantName = input.tenant.name.trim()
+    if (!tenantName) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '租户名称不能为空' })
+    }
+
+    const slugBase = input.tenant.slug?.trim() ? slugify(input.tenant.slug) : slugify(tenantName)
+    if (!slugBase) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '租户标识不能为空' })
+    }
+
+    const slug = await this.generateUniqueSlug(slugBase)
+
+    let tenantId: string | null = null
+    try {
+      const tenantAggregate = await this.tenantService.createTenant({
+        name: tenantName,
+        slug,
+      })
+      tenantId = tenantAggregate.tenant.id
+
+      const auth = this.authProvider.getAuth()
+      const response = await auth.api.signUpEmail({
+        body: {
+          email: accountEmail,
+          password: accountPassword,
+          name: accountName,
+        },
+        headers,
+        asResponse: true,
+      })
+
+      if (!response.ok) {
+        if (tenantId) {
+          await this.tenantService.deleteTenant(tenantId).catch(() => {})
+          tenantId = null
+        }
+        return { response, success: false }
+      }
+
+      let userId: string | undefined
+      try {
+        const payload = (await response.clone().json()) as { user?: { id?: string } } | null
+        userId = payload?.user?.id
+      } catch {
+        userId = undefined
+      }
+
+      if (!userId) {
+        if (tenantId) {
+          await this.tenantService.deleteTenant(tenantId).catch(() => {})
+          tenantId = null
+        }
+        throw new BizException(ErrorCode.COMMON_BAD_REQUEST, {
+          message: '注册成功但未返回用户信息，请稍后重试。',
+        })
+      }
+
+      const db = this.dbAccessor.get()
+      await db.update(authUsers).set({ tenantId, role: 'admin' }).where(eq(authUsers.id, userId))
+
+      const refreshed = await this.tenantService.getById(tenantId)
+
+      return {
+        response,
+        tenant: refreshed.tenant,
+        accountId: userId,
+        success: true,
+      }
+    } catch (error) {
+      if (tenantId) {
+        await this.tenantService.deleteTenant(tenantId).catch(() => {})
+      }
+      throw error
+    }
+  }
+
+  private async generateUniqueSlug(base: string): Promise<string> {
+    const sanitizedBase = base.length > 0 ? base : 'tenant'
+
+    for (let attempt = 0; attempt < 50; attempt += 1) {
+      const candidate = attempt === 0 ? sanitizedBase : `${sanitizedBase}-${attempt + 1}`
+      const existing = await this.tenantRepository.findBySlug(candidate)
+      if (!existing) {
+        return candidate
+      }
+    }
+
+    throw new BizException(ErrorCode.COMMON_BAD_REQUEST, {
+      message: '无法生成唯一的租户标识，请尝试使用不同的名称',
+    })
+  }
+}
diff --git a/be/apps/core/src/modules/auth/auth.controller.ts b/be/apps/core/src/modules/auth/auth.controller.ts
index 6ca66ed0..74850464 100644
--- a/be/apps/core/src/modules/auth/auth.controller.ts
+++ b/be/apps/core/src/modules/auth/auth.controller.ts
@@ -1,5 +1,5 @@
 import { authUsers } from '@afilmory/db'
-import { Body, ContextParam, Controller, Get, Post, UnauthorizedException } from '@afilmory/framework'
+import { Body, ContextParam, Controller, Get, HttpContext, Post, UnauthorizedException } from '@afilmory/framework'
 import { BizException, ErrorCode } from 'core/errors'
 import { eq } from 'drizzle-orm'
 import type { Context } from 'hono'
@@ -8,6 +8,19 @@ import { DbAccessor } from '../../database/database.provider'
 import { RoleBit, Roles } from '../../guards/roles.decorator'
 import { SuperAdminSettingService } from '../system-setting/super-admin-setting.service'
 import { AuthProvider } from './auth.provider'
+import { AuthRegistrationService } from './auth-registration.service'
+
+type TenantSignUpRequest = {
+  account?: {
+    email?: string
+    password?: string
+    name?: string
+  }
+  tenant?: {
+    name?: string
+    slug?: string | null
+  }
+}
 
 @Controller('auth')
 export class AuthController {
@@ -15,23 +28,20 @@ export class AuthController {
     private readonly auth: AuthProvider,
     private readonly dbAccessor: DbAccessor,
     private readonly superAdminSettings: SuperAdminSettingService,
+    private readonly registration: AuthRegistrationService,
   ) {}
 
   @Get('/session')
-  async getSession(@ContextParam() context: Context) {
-    const auth = this.auth.getAuth()
-    // forward tenant headers so Better Auth can persist tenantId via databaseHooks
-    const headers = new Headers(context.req.raw.headers)
-    const tenant = (context as any).var?.tenant
-    if (tenant?.tenant?.id) {
-      headers.set('x-tenant-id', tenant.tenant.id)
-      if (tenant.tenant.slug) headers.set('x-tenant-slug', tenant.tenant.slug)
-    }
-    const session = await auth.api.getSession({ headers })
-    if (!session) {
+  async getSession(@ContextParam() _context: Context) {
+    const authContext = HttpContext.getValue('auth')
+    if (!authContext?.user || !authContext.session) {
       throw new UnauthorizedException()
     }
-    return { user: session.user, session: session.session }
+    return {
+      user: authContext.user,
+      session: authContext.session,
+      source: authContext.source ?? 'global',
+    }
   }
 
   @Post('/sign-in/email')
@@ -75,6 +85,37 @@ export class AuthController {
     return response
   }
 
+  @Post('/tenants/sign-up')
+  async signUpTenant(@ContextParam() context: Context, @Body() body: TenantSignUpRequest) {
+    if (!body?.account || !body?.tenant) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '缺少注册信息' })
+    }
+
+    const headers = new Headers(context.req.raw.headers)
+
+    const result = await this.registration.registerTenant(
+      {
+        account: {
+          email: body.account.email ?? '',
+          password: body.account.password ?? '',
+          name: body.account.name ?? '',
+        },
+        tenant: {
+          name: body.tenant.name ?? '',
+          slug: body.tenant.slug ?? null,
+        },
+      },
+      headers,
+    )
+
+    if (result.success && result.tenant) {
+      context.header('x-tenant-id', result.tenant.id)
+      context.header('x-tenant-slug', result.tenant.slug)
+    }
+
+    return result.response
+  }
+
   @Get('/admin-only')
   @Roles(RoleBit.ADMIN)
   async adminOnly(@ContextParam() _context: Context) {
diff --git a/be/apps/core/src/modules/auth/auth.module.ts b/be/apps/core/src/modules/auth/auth.module.ts
index 667fb691..85597632 100644
--- a/be/apps/core/src/modules/auth/auth.module.ts
+++ b/be/apps/core/src/modules/auth/auth.module.ts
@@ -2,13 +2,15 @@ import { Module } from '@afilmory/framework'
 import { DatabaseModule } from 'core/database/database.module'
 
 import { SystemSettingModule } from '../system-setting/system-setting.module'
+import { TenantModule } from '../tenant/tenant.module'
 import { AuthConfig } from './auth.config'
 import { AuthController } from './auth.controller'
 import { AuthProvider } from './auth.provider'
+import { AuthRegistrationService } from './auth-registration.service'
 
 @Module({
-  imports: [DatabaseModule, SystemSettingModule],
+  imports: [DatabaseModule, SystemSettingModule, TenantModule],
   controllers: [AuthController],
-  providers: [AuthProvider, AuthConfig],
+  providers: [AuthProvider, AuthConfig, AuthRegistrationService],
 })
 export class AuthModule {}
diff --git a/be/apps/core/src/modules/index.module.ts b/be/apps/core/src/modules/index.module.ts
index 199a5a04..bf3137ad 100644
--- a/be/apps/core/src/modules/index.module.ts
+++ b/be/apps/core/src/modules/index.module.ts
@@ -1,8 +1,8 @@
-import { APP_GUARD, APP_MIDDLEWARE, EventModule, Module } from '@afilmory/framework'
+import { APP_GUARD, APP_INTERCEPTOR, APP_MIDDLEWARE, EventModule, Module } from '@afilmory/framework'
 import { AuthGuard } from 'core/guards/auth.guard'
+import { TenantResolverInterceptor } from 'core/interceptors/tenant-resolver.interceptor'
 import { CorsMiddleware } from 'core/middlewares/cors.middleware'
 import { DatabaseContextMiddleware } from 'core/middlewares/database-context.middleware'
-import { TenantResolverMiddleware } from 'core/middlewares/tenant-resolver.middleware'
 import { RedisAccessor } from 'core/redis/redis.provider'
 
 import { DatabaseModule } from '../database/database.module'
@@ -18,6 +18,7 @@ import { StaticWebModule } from './static-web/static-web.module'
 import { SuperAdminModule } from './super-admin/super-admin.module'
 import { SystemSettingModule } from './system-setting/system-setting.module'
 import { TenantModule } from './tenant/tenant.module'
+import { TenantAuthModule } from './tenant-auth/tenant-auth.module'
 
 function createEventModuleOptions(redis: RedisAccessor) {
   return {
@@ -38,6 +39,7 @@ function createEventModuleOptions(redis: RedisAccessor) {
     ReactionModule,
     DashboardModule,
     TenantModule,
+    TenantAuthModule,
     DataSyncModule,
     StaticWebModule,
     EventModule.forRootAsync({
@@ -50,10 +52,6 @@ function createEventModuleOptions(redis: RedisAccessor) {
       provide: APP_MIDDLEWARE,
       useClass: CorsMiddleware,
     },
-    {
-      provide: APP_MIDDLEWARE,
-      useClass: TenantResolverMiddleware,
-    },
     {
       provide: APP_MIDDLEWARE,
       useClass: DatabaseContextMiddleware,
@@ -63,6 +61,10 @@ function createEventModuleOptions(redis: RedisAccessor) {
       provide: APP_GUARD,
       useClass: AuthGuard,
     },
+    {
+      provide: APP_INTERCEPTOR,
+      useClass: TenantResolverInterceptor,
+    },
   ],
 })
 export class AppModules {}
diff --git a/be/apps/core/src/modules/onboarding/onboarding.dto.ts b/be/apps/core/src/modules/onboarding/onboarding.dto.ts
index b603c248..c5e76eec 100644
--- a/be/apps/core/src/modules/onboarding/onboarding.dto.ts
+++ b/be/apps/core/src/modules/onboarding/onboarding.dto.ts
@@ -38,11 +38,6 @@ export class OnboardingInitDto extends createZodDto(
         .string()
         .min(1)
         .regex(/^[a-z0-9-]+$/, { message: 'Slug should be lowercase alphanumeric with hyphen' }),
-      domain: z
-        .string()
-        .min(1)
-        .regex(/^[a-z0-9.-]+$/, { message: 'Domain should be lowercase letters, numbers, dot or hyphen' })
-        .optional(),
     }),
     settings: normalizeEntries.optional().transform((entries) => entries ?? []),
   }),
diff --git a/be/apps/core/src/modules/onboarding/onboarding.service.ts b/be/apps/core/src/modules/onboarding/onboarding.service.ts
index caa340ee..b6bc8eee 100644
--- a/be/apps/core/src/modules/onboarding/onboarding.service.ts
+++ b/be/apps/core/src/modules/onboarding/onboarding.service.ts
@@ -43,8 +43,6 @@ export class OnboardingService {
     const tenantAggregate = await this.tenantService.createTenant({
       name: payload.tenant.name,
       slug: payload.tenant.slug,
-      domain: payload.tenant.domain,
-      isPrimary: true,
     })
 
     log.info(`Created tenant ${tenantAggregate.tenant.slug} (${tenantAggregate.tenant.id})`)
diff --git a/be/apps/core/src/modules/setting/setting.constant.ts b/be/apps/core/src/modules/setting/setting.constant.ts
index a0307a3b..f4e9dc7b 100644
--- a/be/apps/core/src/modules/setting/setting.constant.ts
+++ b/be/apps/core/src/modules/setting/setting.constant.ts
@@ -31,6 +31,28 @@ export const DEFAULT_SETTING_DEFINITIONS = {
     isSensitive: true,
     schema: z.string().min(1, 'GitHub Client secret cannot be empty'),
   },
+  'auth.tenant.config': {
+    isSensitive: true,
+    schema: z
+      .string()
+      .transform((value) => value.trim())
+      .transform((value, ctx) => {
+        if (value.length === 0) {
+          return '{}'
+        }
+
+        try {
+          const parsed = JSON.parse(value)
+          return JSON.stringify(parsed)
+        } catch {
+          ctx.addIssue({
+            code: z.ZodIssueCode.custom,
+            message: 'Tenant auth configuration must be valid JSON',
+          })
+          return z.NEVER
+        }
+      }),
+  },
   'builder.storage.providers': {
     isSensitive: false,
     schema: z.string().transform((value, ctx) => {
diff --git a/be/apps/core/src/modules/setting/setting.service.ts b/be/apps/core/src/modules/setting/setting.service.ts
index a5aa8556..69368e49 100644
--- a/be/apps/core/src/modules/setting/setting.service.ts
+++ b/be/apps/core/src/modules/setting/setting.service.ts
@@ -3,6 +3,7 @@ import { createCipheriv, createDecipheriv, createHash, randomBytes } from 'node:
 import { settings } from '@afilmory/db'
 import { env } from '@afilmory/env'
 import { EventEmitterService } from '@afilmory/framework'
+import { BizException, ErrorCode } from 'core/errors'
 import { and, eq, inArray } from 'drizzle-orm'
 import { injectable } from 'tsyringe'
 
@@ -260,8 +261,7 @@ export class SettingService {
       return tenant.tenant.id
     }
 
-    const fallback = await this.tenantService.resolve({ fallbackToPrimary: true })
-    return fallback.tenant.id
+    throw new BizException(ErrorCode.TENANT_NOT_FOUND)
   }
 
   private encrypt(value: string): string {
diff --git a/be/apps/core/src/modules/super-admin/super-admin.dto.ts b/be/apps/core/src/modules/super-admin/super-admin.dto.ts
index e03a7a78..2495df8a 100644
--- a/be/apps/core/src/modules/super-admin/super-admin.dto.ts
+++ b/be/apps/core/src/modules/super-admin/super-admin.dto.ts
@@ -6,6 +6,12 @@ const updateSuperAdminSettingsSchema = z
     allowRegistration: z.boolean().optional(),
     maxRegistrableUsers: z.number().int().min(0).nullable().optional(),
     localProviderEnabled: z.boolean().optional(),
+    baseDomain: z
+      .string()
+      .trim()
+      .min(1)
+      .regex(/^[a-z0-9.-]+$/i, { message: '无效的基础域名' })
+      .optional(),
   })
   .refine((value) => Object.values(value).some((entry) => entry !== undefined), {
     message: '至少需要更新一项设置',
diff --git a/be/apps/core/src/modules/system-setting/super-admin-setting.constants.ts b/be/apps/core/src/modules/system-setting/super-admin-setting.constants.ts
index 2988e179..12dc53c0 100644
--- a/be/apps/core/src/modules/system-setting/super-admin-setting.constants.ts
+++ b/be/apps/core/src/modules/system-setting/super-admin-setting.constants.ts
@@ -1,3 +1,4 @@
+import { DEFAULT_BASE_DOMAIN } from '@afilmory/utils'
 import { z } from 'zod'
 
 export const SUPER_ADMIN_SETTING_DEFINITIONS = {
@@ -16,6 +17,17 @@ export const SUPER_ADMIN_SETTING_DEFINITIONS = {
     schema: z.boolean(),
     defaultValue: true,
   },
+  baseDomain: {
+    key: 'system.domain.base',
+    schema: z
+      .string()
+      .trim()
+      .min(1)
+      .regex(/^[a-z0-9.-]+$/i, {
+        message: '域名只能包含字母、数字、连字符和点',
+      }),
+    defaultValue: DEFAULT_BASE_DOMAIN,
+  },
 } as const
 
 export type SuperAdminSettingField = keyof typeof SUPER_ADMIN_SETTING_DEFINITIONS
diff --git a/be/apps/core/src/modules/system-setting/super-admin-setting.service.ts b/be/apps/core/src/modules/system-setting/super-admin-setting.service.ts
index bd9ca5ce..212c2b01 100644
--- a/be/apps/core/src/modules/system-setting/super-admin-setting.service.ts
+++ b/be/apps/core/src/modules/system-setting/super-admin-setting.service.ts
@@ -43,10 +43,19 @@ export class SuperAdminSettingService {
       SUPER_ADMIN_SETTING_DEFINITIONS.localProviderEnabled.defaultValue,
     )
 
+    const baseDomainRaw = this.parseSetting(
+      rawValues[SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.key],
+      SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.schema,
+      SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.defaultValue,
+    )
+
+    const baseDomain = baseDomainRaw.trim().toLowerCase()
+
     return {
       allowRegistration,
       maxRegistrableUsers,
       localProviderEnabled,
+      baseDomain,
     }
   }
 
@@ -111,6 +120,23 @@ export class SuperAdminSettingService {
       }
     }
 
+    if (patch.baseDomain !== undefined) {
+      const sanitized = patch.baseDomain === null ? null : String(patch.baseDomain).trim().toLowerCase()
+      if (!sanitized) {
+        updates.push({
+          key: SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.key,
+          value: SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.defaultValue,
+        })
+        current.baseDomain = SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.defaultValue
+      } else if (sanitized !== current.baseDomain) {
+        updates.push({
+          key: SUPER_ADMIN_SETTING_DEFINITIONS.baseDomain.key,
+          value: sanitized,
+        })
+        current.baseDomain = sanitized
+      }
+    }
+
     if (updates.length === 0) {
       return current
     }
diff --git a/be/apps/core/src/modules/system-setting/super-admin-setting.types.ts b/be/apps/core/src/modules/system-setting/super-admin-setting.types.ts
index 00037768..cfd9205d 100644
--- a/be/apps/core/src/modules/system-setting/super-admin-setting.types.ts
+++ b/be/apps/core/src/modules/system-setting/super-admin-setting.types.ts
@@ -5,6 +5,7 @@ export interface SuperAdminSettings {
   allowRegistration: boolean
   maxRegistrableUsers: number | null
   localProviderEnabled: boolean
+  baseDomain: string
 }
 
 export type SuperAdminSettingValueMap = {
diff --git a/be/apps/core/src/modules/system-setting/super-admin-setting.ui-schema.ts b/be/apps/core/src/modules/system-setting/super-admin-setting.ui-schema.ts
index a6b61508..82eae5df 100644
--- a/be/apps/core/src/modules/system-setting/super-admin-setting.ui-schema.ts
+++ b/be/apps/core/src/modules/system-setting/super-admin-setting.ui-schema.ts
@@ -35,6 +35,18 @@ export const SUPER_ADMIN_SETTING_UI_SCHEMA: UiSchema<SuperAdminSettingField> = {
             type: 'switch',
           },
         },
+        {
+          type: 'field',
+          id: 'platform-base-domain',
+          title: '平台基础域名',
+          description: '用于解析子域名租户，如 example.{{value}}。更新后请确保证书和 DNS 已正确配置。',
+          helperText: '留空使用默认域名 afilmory.art。',
+          key: 'baseDomain',
+          component: {
+            type: 'text',
+            placeholder: 'afilmory.art',
+          },
+        },
         {
           type: 'field',
           id: 'registration-max-users',
diff --git a/be/apps/core/src/modules/tenant-auth/tenant-auth.config.ts b/be/apps/core/src/modules/tenant-auth/tenant-auth.config.ts
new file mode 100644
index 00000000..03deabe8
--- /dev/null
+++ b/be/apps/core/src/modules/tenant-auth/tenant-auth.config.ts
@@ -0,0 +1,76 @@
+import { injectable } from 'tsyringe'
+import { z } from 'zod'
+
+import type { SocialProvidersConfig } from '../auth/auth.config'
+import { SettingService } from '../setting/setting.service'
+
+export const TENANT_AUTH_CONFIG_SETTING_KEY = 'auth.tenant.config'
+
+export interface TenantAuthOptions {
+  localProviderEnabled: boolean
+  socialProviders: SocialProvidersConfig
+}
+
+const providerConfigSchema = z.object({
+  clientId: z.string().min(1),
+  clientSecret: z.string().min(1),
+  redirectUri: z.string().min(1).optional(),
+})
+
+const tenantAuthConfigSchema = z
+  .object({
+    localProviderEnabled: z.boolean().default(true),
+    socialProviders: z
+      .object({
+        google: providerConfigSchema.optional(),
+        github: providerConfigSchema.optional(),
+        zoom: providerConfigSchema.optional(),
+      })
+      .partial()
+      .default({}),
+  })
+  .default({ localProviderEnabled: true, socialProviders: {} })
+
+type TenantAuthConfig = z.infer<typeof tenantAuthConfigSchema>
+
+function normalizeConfig(raw: TenantAuthConfig): TenantAuthOptions {
+  const socialProviders: SocialProvidersConfig = {}
+
+  if (raw.socialProviders?.google) {
+    socialProviders.google = raw.socialProviders.google
+  }
+
+  if (raw.socialProviders?.github) {
+    socialProviders.github = raw.socialProviders.github
+  }
+
+  if (raw.socialProviders?.zoom) {
+    socialProviders.zoom = raw.socialProviders.zoom
+  }
+
+  return {
+    localProviderEnabled: raw.localProviderEnabled ?? true,
+    socialProviders,
+  }
+}
+
+@injectable()
+export class TenantAuthConfigService {
+  constructor(private readonly settingService: SettingService) {}
+
+  async getOptions(tenantId: string): Promise<TenantAuthOptions> {
+    const rawValue = await this.settingService.get(TENANT_AUTH_CONFIG_SETTING_KEY, { tenantId })
+
+    if (!rawValue) {
+      return normalizeConfig({ localProviderEnabled: true, socialProviders: {} })
+    }
+
+    try {
+      const parsed = tenantAuthConfigSchema.parse(JSON.parse(rawValue))
+      return normalizeConfig(parsed)
+    } catch {
+      // Fall back to defaults if parsing fails; tenant admins can fix configuration later.
+      return normalizeConfig({ localProviderEnabled: true, socialProviders: {} })
+    }
+  }
+}
diff --git a/be/apps/core/src/modules/tenant-auth/tenant-auth.controller.ts b/be/apps/core/src/modules/tenant-auth/tenant-auth.controller.ts
new file mode 100644
index 00000000..2394285c
--- /dev/null
+++ b/be/apps/core/src/modules/tenant-auth/tenant-auth.controller.ts
@@ -0,0 +1,124 @@
+import { Body, ContextParam, Controller, Get, Post } from '@afilmory/framework'
+import { BizException, ErrorCode } from 'core/errors'
+import { requireTenantContext } from 'core/modules/tenant/tenant.context'
+import type { Context } from 'hono'
+
+import { TenantAuthConfigService } from './tenant-auth.config'
+import { TenantAuthProvider } from './tenant-auth.provider'
+
+type TenantAuthEmailPayload = {
+  email: string
+  password: string
+  name?: string
+}
+
+@Controller('tenant-auth')
+export class TenantAuthController {
+  constructor(
+    private readonly tenantAuthProvider: TenantAuthProvider,
+    private readonly tenantAuthConfig: TenantAuthConfigService,
+  ) {}
+
+  @Get('/session')
+  async getSession(@ContextParam() context: Context) {
+    const tenant = requireTenantContext()
+    const auth = await this.tenantAuthProvider.getAuth(tenant.tenant.id)
+    const session = await auth.api.getSession({ headers: context.req.raw.headers })
+
+    if (!session) {
+      throw new BizException(ErrorCode.AUTH_UNAUTHORIZED)
+    }
+
+    context.header('x-tenant-id', tenant.tenant.id)
+    context.header('x-tenant-slug', tenant.tenant.slug)
+
+    return { user: session.user, session: session.session, source: 'tenant' as const }
+  }
+
+  @Post('/sign-in/email')
+  async signInEmail(@ContextParam() context: Context, @Body() body: TenantAuthEmailPayload) {
+    const tenant = requireTenantContext()
+    const email = body?.email?.trim() ?? ''
+    const password = body?.password ?? ''
+
+    if (!email) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '邮箱不能为空' })
+    }
+
+    if (!password) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '密码不能为空' })
+    }
+
+    const config = await this.tenantAuthConfig.getOptions(tenant.tenant.id)
+
+    if (!config.localProviderEnabled) {
+      throw new BizException(ErrorCode.AUTH_FORBIDDEN, {
+        message: '当前租户已关闭邮箱密码登录，请联系管理员获取访问权限。',
+      })
+    }
+
+    const auth = await this.tenantAuthProvider.getAuth(tenant.tenant.id)
+    const response = await auth.api.signInEmail({
+      body: { email, password },
+      headers: context.req.raw.headers,
+      asResponse: true,
+    })
+
+    context.header('x-tenant-id', tenant.tenant.id)
+    context.header('x-tenant-slug', tenant.tenant.slug)
+
+    return response
+  }
+
+  @Post('/sign-up/email')
+  async signUpEmail(@ContextParam() context: Context, @Body() body: TenantAuthEmailPayload) {
+    const tenant = requireTenantContext()
+    const email = body?.email?.trim() ?? ''
+    const password = body?.password ?? ''
+    const name = body?.name?.trim() || email
+
+    if (!email) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '邮箱不能为空' })
+    }
+
+    if (!password) {
+      throw new BizException(ErrorCode.COMMON_BAD_REQUEST, { message: '密码不能为空' })
+    }
+
+    const config = await this.tenantAuthConfig.getOptions(tenant.tenant.id)
+
+    if (!config.localProviderEnabled) {
+      throw new BizException(ErrorCode.AUTH_FORBIDDEN, {
+        message: '当前租户已关闭邮箱注册，请联系管理员开启后再试。',
+      })
+    }
+
+    const auth = await this.tenantAuthProvider.getAuth(tenant.tenant.id)
+    const response = await auth.api.signUpEmail({
+      body: {
+        email,
+        password,
+        name,
+      },
+      headers: context.req.raw.headers,
+      asResponse: true,
+    })
+
+    context.header('x-tenant-id', tenant.tenant.id)
+    context.header('x-tenant-slug', tenant.tenant.slug)
+
+    return response
+  }
+
+  @Get('/*')
+  async passthroughGet(@ContextParam() context: Context) {
+    const tenant = requireTenantContext()
+    return await this.tenantAuthProvider.handler(context, tenant.tenant.id)
+  }
+
+  @Post('/*')
+  async passthroughPost(@ContextParam() context: Context) {
+    const tenant = requireTenantContext()
+    return await this.tenantAuthProvider.handler(context, tenant.tenant.id)
+  }
+}
diff --git a/be/apps/core/src/modules/tenant-auth/tenant-auth.module.ts b/be/apps/core/src/modules/tenant-auth/tenant-auth.module.ts
new file mode 100644
index 00000000..83c7a4c7
--- /dev/null
+++ b/be/apps/core/src/modules/tenant-auth/tenant-auth.module.ts
@@ -0,0 +1,14 @@
+import { Module } from '@afilmory/framework'
+
+import { DatabaseModule } from '../../database/database.module'
+import { SettingModule } from '../setting/setting.module'
+import { TenantAuthConfigService } from './tenant-auth.config'
+import { TenantAuthController } from './tenant-auth.controller'
+import { TenantAuthProvider } from './tenant-auth.provider'
+
+@Module({
+  imports: [DatabaseModule, SettingModule],
+  controllers: [TenantAuthController],
+  providers: [TenantAuthProvider, TenantAuthConfigService],
+})
+export class TenantAuthModule {}
diff --git a/be/apps/core/src/modules/tenant-auth/tenant-auth.provider.ts b/be/apps/core/src/modules/tenant-auth/tenant-auth.provider.ts
new file mode 100644
index 00000000..cd787df5
--- /dev/null
+++ b/be/apps/core/src/modules/tenant-auth/tenant-auth.provider.ts
@@ -0,0 +1,135 @@
+import { generateId, tenantAuthAccounts, tenantAuthSessions, tenantAuthUsers } from '@afilmory/db'
+import type { OnModuleDestroy, OnModuleInit } from '@afilmory/framework'
+import { EventEmitterService } from '@afilmory/framework'
+import { betterAuth } from 'better-auth'
+import { drizzleAdapter } from 'better-auth/adapters/drizzle'
+import { createAuthMiddleware } from 'better-auth/api'
+import type { Context } from 'hono'
+import { injectable } from 'tsyringe'
+
+import { DrizzleProvider } from '../../database/database.provider'
+import { TENANT_AUTH_CONFIG_SETTING_KEY, TenantAuthConfigService } from './tenant-auth.config'
+
+export type TenantBetterAuthInstance = ReturnType<typeof betterAuth>
+export type TenantAuthSession = TenantBetterAuthInstance['$Infer']['Session']
+
+@injectable()
+export class TenantAuthProvider implements OnModuleInit, OnModuleDestroy {
+  private readonly cache = new Map<string, TenantBetterAuthInstance>()
+
+  constructor(
+    private readonly drizzleProvider: DrizzleProvider,
+    private readonly configService: TenantAuthConfigService,
+    private readonly eventEmitter: EventEmitterService,
+  ) {}
+
+  async onModuleInit(): Promise<void> {
+    this.eventEmitter.on('setting.updated', this.handleSettingUpdated)
+    this.eventEmitter.on('setting.deleted', this.handleSettingDeleted)
+  }
+
+  async onModuleDestroy(): Promise<void> {
+    this.eventEmitter.off('setting.updated', this.handleSettingUpdated)
+    this.eventEmitter.off('setting.deleted', this.handleSettingDeleted)
+    this.cache.clear()
+  }
+
+  private readonly handleSettingUpdated = ({ tenantId, key }: { tenantId: string; key: string }) => {
+    if (key !== TENANT_AUTH_CONFIG_SETTING_KEY) {
+      return
+    }
+    this.cache.delete(tenantId)
+  }
+
+  private readonly handleSettingDeleted = ({ tenantId, key }: { tenantId: string; key: string }) => {
+    if (key !== TENANT_AUTH_CONFIG_SETTING_KEY) {
+      return
+    }
+    this.cache.delete(tenantId)
+  }
+
+  async getAuth(tenantId: string): Promise<TenantBetterAuthInstance> {
+    const cached = this.cache.get(tenantId)
+    if (cached) {
+      return cached
+    }
+
+    const db = this.drizzleProvider.getDb()
+    const tenantOptions = await this.configService.getOptions(tenantId)
+
+    const instance = betterAuth({
+      database: drizzleAdapter(db, {
+        provider: 'pg',
+        schema: {
+          user: tenantAuthUsers,
+          session: tenantAuthSessions,
+          account: tenantAuthAccounts,
+        },
+      }),
+      emailAndPassword: { enabled: tenantOptions.localProviderEnabled },
+      socialProviders: tenantOptions.socialProviders,
+      user: {
+        additionalFields: {
+          tenantId: { type: 'string', input: false },
+          role: { type: 'string', input: false },
+        },
+      },
+      databaseHooks: {
+        user: {
+          create: {
+            before: async (user) => ({
+              data: {
+                ...user,
+                tenantId,
+                role: user.role ?? 'guest',
+              },
+            }),
+          },
+        },
+        session: {
+          create: {
+            before: async (session) => ({
+              data: {
+                ...session,
+                tenantId,
+              },
+            }),
+          },
+        },
+        account: {
+          create: {
+            before: async (account) => ({
+              data: {
+                ...account,
+                tenantId,
+              },
+            }),
+          },
+        },
+      },
+      advanced: {
+        database: {
+          generateId: () => generateId(),
+        },
+      },
+      hooks: {
+        before: createAuthMiddleware(async (ctx) => {
+          if (ctx.path === '/sign-up/email' && !tenantOptions.localProviderEnabled) {
+            throw new Response(JSON.stringify({ message: '当前租户未启用邮件注册，请联系管理员获取访问权限。' }), {
+              status: 403,
+              headers: { 'content-type': 'application/json' },
+            })
+          }
+        }),
+      },
+    })
+
+    this.cache.set(tenantId, instance)
+    return instance
+  }
+
+  async handler(context: Context, tenantId: string): Promise<Response> {
+    const auth = await this.getAuth(tenantId)
+    return auth.handler(context.req.raw)
+  }
+}
diff --git a/be/apps/core/src/modules/tenant/tenant-context-resolver.service.ts b/be/apps/core/src/modules/tenant/tenant-context-resolver.service.ts
new file mode 100644
index 00000000..c376c793
--- /dev/null
+++ b/be/apps/core/src/modules/tenant/tenant-context-resolver.service.ts
@@ -0,0 +1,181 @@
+import { HttpContext } from '@afilmory/framework'
+import { DEFAULT_BASE_DOMAIN, isTenantSlugReserved } from '@afilmory/utils'
+import { BizException, ErrorCode } from 'core/errors'
+import type { Context } from 'hono'
+import { injectable } from 'tsyringe'
+
+import { logger } from '../../helpers/logger.helper'
+import { OnboardingService } from '../onboarding/onboarding.service'
+import { SuperAdminSettingService } from '../system-setting/super-admin-setting.service'
+import { TenantService } from './tenant.service'
+import type { TenantContext } from './tenant.types'
+
+const HEADER_TENANT_ID = 'x-tenant-id'
+const HEADER_TENANT_SLUG = 'x-tenant-slug'
+
+export interface TenantResolutionOptions {
+  throwOnMissing?: boolean
+  setResponseHeaders?: boolean
+  skipInitializationCheck?: boolean
+}
+
+@injectable()
+export class TenantContextResolver {
+  private readonly log = logger.extend('TenantResolver')
+
+  constructor(
+    private readonly tenantService: TenantService,
+    private readonly onboardingService: OnboardingService,
+    private readonly superAdminSettingService: SuperAdminSettingService,
+  ) {}
+
+  async resolve(context: Context, options: TenantResolutionOptions = {}): Promise<TenantContext | null> {
+    const existing = this.getExistingContext()
+    if (existing) {
+      if (options.setResponseHeaders !== false) {
+        this.applyTenantHeaders(context, existing)
+      }
+      return existing
+    }
+
+    if (!options.skipInitializationCheck) {
+      const initialized = await this.onboardingService.isInitialized()
+      if (!initialized) {
+        this.log.info(`Application not initialized yet, skip tenant resolution for ${context.req.path}`)
+        return null
+      }
+    }
+
+    const forwardedHost = context.req.header('x-forwarded-host')
+    const origin = context.req.header('origin')
+    const hostHeader = context.req.header('host')
+    const host = this.normalizeHost(forwardedHost ?? hostHeader ?? null, origin)
+
+    const tenantId = this.normalizeString(context.req.header(HEADER_TENANT_ID))
+    const tenantSlugHeader = this.normalizeSlug(context.req.header(HEADER_TENANT_SLUG))
+
+    this.log.verbose(
+      `Resolve tenant for request ${context.req.method} ${context.req.path} (host=${host ?? 'n/a'}, id=${tenantId ?? 'n/a'}, slug=${tenantSlugHeader ?? 'n/a'})`,
+    )
+
+    const baseDomain = await this.getBaseDomain()
+
+    let derivedSlug = tenantSlugHeader
+
+    if (!derivedSlug && host) {
+      derivedSlug = this.extractSlugFromHost(host, baseDomain)
+    }
+
+    if (derivedSlug && isTenantSlugReserved(derivedSlug)) {
+      this.log.verbose(`Host ${host} matched reserved slug ${derivedSlug}, skipping tenant resolution.`)
+      return null
+    }
+
+    const tenantContext = await this.tenantService.resolve(
+      {
+        tenantId,
+        slug: derivedSlug,
+      },
+      true,
+    )
+
+    if (!tenantContext) {
+      if (options.throwOnMissing && (tenantId || derivedSlug)) {
+        throw new BizException(ErrorCode.TENANT_NOT_FOUND)
+      }
+      return null
+    }
+
+    HttpContext.setValue('tenant', tenantContext)
+
+    if (options.setResponseHeaders !== false) {
+      this.applyTenantHeaders(context, tenantContext)
+    }
+
+    return tenantContext
+  }
+
+  private getExistingContext(): TenantContext | null {
+    try {
+      return (HttpContext.getValue('tenant') as TenantContext | undefined) ?? null
+    } catch {
+      return null
+    }
+  }
+
+  private applyTenantHeaders(context: Context, tenantContext: TenantContext): void {
+    context.header(HEADER_TENANT_ID, tenantContext.tenant.id)
+    context.header(HEADER_TENANT_SLUG, tenantContext.tenant.slug)
+  }
+
+  private async getBaseDomain(): Promise<string> {
+    if (process.env.NODE_ENV === 'development') {
+      return 'localhost'
+    }
+    const settings = await this.superAdminSettingService.getSettings()
+    return settings.baseDomain || DEFAULT_BASE_DOMAIN
+  }
+
+  private normalizeHost(host: string | null | undefined, origin: string | null | undefined): string | null {
+    const source = host ?? this.extractHostFromOrigin(origin)
+    if (!source) {
+      return null
+    }
+
+    return source.trim().toLowerCase()
+  }
+
+  private extractHostFromOrigin(origin: string | null | undefined): string | null {
+    if (!origin) {
+      return null
+    }
+
+    try {
+      const url = new URL(origin)
+      return url.host
+    } catch {
+      return null
+    }
+  }
+
+  private normalizeString(value: string | null | undefined): string | undefined {
+    if (!value) {
+      return undefined
+    }
+    const trimmed = value.trim()
+    return trimmed.length > 0 ? trimmed : undefined
+  }
+
+  private normalizeSlug(value: string | null | undefined): string | undefined {
+    const normalized = this.normalizeString(value)
+    return normalized ? normalized.toLowerCase() : undefined
+  }
+
+  private extractSlugFromHost(host: string, baseDomain: string): string | undefined {
+    const hostname = host.split(':')[0]
+
+    if (!hostname) {
+      return undefined
+    }
+
+    if (hostname.endsWith('.localhost')) {
+      const parts = hostname.split('.localhost')[0]
+      return parts ? parts.trim().toLowerCase() : undefined
+    }
+
+    const normalizedBase = baseDomain.toLowerCase()
+    if (hostname === normalizedBase) {
+      return undefined
+    }
+
+    if (hostname.endsWith(`.${normalizedBase}`)) {
+      const candidate = hostname.slice(0, hostname.length - normalizedBase.length - 1)
+      if (!candidate || candidate.includes('.')) {
+        return undefined
+      }
+      return candidate.toLowerCase()
+    }
+
+    return undefined
+  }
+}
diff --git a/be/apps/core/src/modules/tenant/tenant.module.ts b/be/apps/core/src/modules/tenant/tenant.module.ts
index 191173d2..6aa7971f 100644
--- a/be/apps/core/src/modules/tenant/tenant.module.ts
+++ b/be/apps/core/src/modules/tenant/tenant.module.ts
@@ -5,9 +5,10 @@ import { DatabaseModule } from 'core/database/database.module'
 
 import { TenantRepository } from './tenant.repository'
 import { TenantService } from './tenant.service'
+import { TenantContextResolver } from './tenant-context-resolver.service'
 
 @Module({
   imports: [DatabaseModule],
-  providers: [TenantRepository, TenantService],
+  providers: [TenantRepository, TenantService, TenantContextResolver],
 })
 export class TenantModule {}
diff --git a/be/apps/core/src/modules/tenant/tenant.repository.ts b/be/apps/core/src/modules/tenant/tenant.repository.ts
index d8ad6ecd..4deb72c7 100644
--- a/be/apps/core/src/modules/tenant/tenant.repository.ts
+++ b/be/apps/core/src/modules/tenant/tenant.repository.ts
@@ -1,9 +1,9 @@
-import { generateId, tenantDomains, tenants } from '@afilmory/db'
-import { and, eq } from 'drizzle-orm'
+import { generateId, tenants } from '@afilmory/db'
+import { eq } from 'drizzle-orm'
 import { injectable } from 'tsyringe'
 
 import { DbAccessor } from '../../database/database.provider'
-import type { TenantAggregate, TenantDomainMatch } from './tenant.types'
+import type { TenantAggregate } from './tenant.types'
 
 @injectable()
 export class TenantRepository {
@@ -15,64 +15,20 @@ export class TenantRepository {
     if (!tenant) {
       return null
     }
-    const domains = await db.select().from(tenantDomains).where(eq(tenantDomains.tenantId, tenant.id))
-    return { tenant, domains }
+    return { tenant }
   }
 
   async findBySlug(slug: string): Promise<TenantAggregate | null> {
     const db = this.dbAccessor.get()
     const [tenant] = await db.select().from(tenants).where(eq(tenants.slug, slug)).limit(1)
+
     if (!tenant) {
       return null
     }
-    const domains = await db.select().from(tenantDomains).where(eq(tenantDomains.tenantId, tenant.id))
-    return { tenant, domains }
+    return { tenant }
   }
 
-  async findPrimary(): Promise<TenantAggregate | null> {
-    const db = this.dbAccessor.get()
-    const [tenant] = await db
-      .select()
-      .from(tenants)
-      .where(and(eq(tenants.isPrimary, true), eq(tenants.status, 'active')))
-      .limit(1)
-    if (!tenant) {
-      return null
-    }
-    const domains = await db.select().from(tenantDomains).where(eq(tenantDomains.tenantId, tenant.id))
-    return { tenant, domains }
-  }
-
-  async findByDomain(domain: string): Promise<TenantDomainMatch | null> {
-    const normalized = domain.trim().toLowerCase()
-    if (!normalized) {
-      return null
-    }
-
-    const db = this.dbAccessor.get()
-    const [matchedDomain] = await db.select().from(tenantDomains).where(eq(tenantDomains.domain, normalized)).limit(1)
-
-    if (!matchedDomain) {
-      return null
-    }
-
-    const aggregate = await this.findById(matchedDomain.tenantId)
-    if (!aggregate) {
-      return null
-    }
-
-    return {
-      ...aggregate,
-      matchedDomain,
-    }
-  }
-
-  async createTenant(payload: {
-    name: string
-    slug: string
-    domain?: string | null
-    isPrimary?: boolean
-  }): Promise<TenantAggregate> {
+  async createTenant(payload: { name: string; slug: string }): Promise<TenantAggregate> {
     const db = this.dbAccessor.get()
     const tenantId = generateId()
     const tenantRecord: typeof tenants.$inferInsert = {
@@ -80,29 +36,10 @@ export class TenantRepository {
       name: payload.name,
       slug: payload.slug,
       status: 'active',
-      primaryDomain: payload.domain ?? null,
-      isPrimary: payload.isPrimary ?? false,
-    }
-
-    if (tenantRecord.isPrimary) {
-      await db
-        .update(tenants)
-        .set({ isPrimary: false })
-        .where(and(eq(tenants.isPrimary, true), eq(tenants.status, 'active')))
     }
 
     await db.insert(tenants).values(tenantRecord)
 
-    if (payload.domain) {
-      const domainRecord: typeof tenantDomains.$inferInsert = {
-        id: generateId(),
-        tenantId,
-        domain: payload.domain,
-        isPrimary: true,
-      }
-      await db.insert(tenantDomains).values(domainRecord)
-    }
-
     return await this.findById(tenantId).then((aggregate) => {
       if (!aggregate) {
         throw new Error('Failed to create tenant')
@@ -110,4 +47,9 @@ export class TenantRepository {
       return aggregate
     })
   }
+
+  async deleteById(id: string): Promise<void> {
+    const db = this.dbAccessor.get()
+    await db.delete(tenants).where(eq(tenants.id, id))
+  }
 }
diff --git a/be/apps/core/src/modules/tenant/tenant.service.ts b/be/apps/core/src/modules/tenant/tenant.service.ts
index b4fdfbe7..9520198c 100644
--- a/be/apps/core/src/modules/tenant/tenant.service.ts
+++ b/be/apps/core/src/modules/tenant/tenant.service.ts
@@ -1,33 +1,30 @@
-import { createLogger } from '@afilmory/framework'
 import { BizException, ErrorCode } from 'core/errors'
 import { injectable } from 'tsyringe'
 
 import { TenantRepository } from './tenant.repository'
-import type { TenantAggregate, TenantContext, TenantDomainMatch, TenantResolutionInput } from './tenant.types'
+import type { TenantAggregate, TenantContext, TenantResolutionInput } from './tenant.types'
 
 @injectable()
 export class TenantService {
-  private readonly logger = createLogger('TenantService')
-
   constructor(private readonly repository: TenantRepository) {}
 
-  async createTenant(payload: {
-    name: string
-    slug: string
-    domain?: string | null
-    isPrimary?: boolean
-  }): Promise<TenantAggregate> {
+  async createTenant(payload: { name: string; slug: string }): Promise<TenantAggregate> {
     return await this.repository.createTenant(payload)
   }
   async resolve(input: TenantResolutionInput, noThrow: boolean): Promise<TenantContext | null>
   async resolve(input: TenantResolutionInput): Promise<TenantContext>
   async resolve(input: TenantResolutionInput, noThrow = false): Promise<TenantContext | null> {
-    const fallbackToPrimary = input.fallbackToPrimary ?? true
     const tenantId = this.normalizeString(input.tenantId)
     const slug = this.normalizeSlug(input.slug)
-    const domain = this.normalizeDomain(input.domain)
 
-    let aggregate: TenantAggregate | TenantDomainMatch | null = null
+    let aggregate: TenantAggregate | null = null
+
+    if (!tenantId && !slug) {
+      if (noThrow) {
+        return null
+      }
+      throw new BizException(ErrorCode.TENANT_NOT_FOUND)
+    }
 
     if (tenantId) {
       aggregate = await this.repository.findById(tenantId)
@@ -37,44 +34,6 @@ export class TenantService {
       aggregate = await this.repository.findBySlug(slug)
     }
 
-    if (!aggregate && domain) {
-      aggregate = await this.repository.findByDomain(domain)
-    }
-
-    if (!aggregate && fallbackToPrimary) {
-      aggregate = await this.repository.findPrimary()
-
-      if (aggregate) {
-        this.logger.warn('Tenant resolution fallback to primary tenant', {
-          fallback: 'primary',
-          requested: {
-            tenantId: tenantId ?? undefined,
-            slug: slug ?? undefined,
-            domain: domain ?? undefined,
-          },
-          resolvedTenantId: aggregate.tenant.id,
-          resolvedTenantSlug: aggregate.tenant.slug,
-        })
-      }
-    }
-
-    if (!aggregate && fallbackToPrimary) {
-      aggregate = await this.repository.findPrimary()
-
-      if (aggregate) {
-        this.logger.warn('Tenant resolution fallback to default tenant slug', {
-          fallback: 'defaultSlug',
-          requested: {
-            tenantId: tenantId ?? undefined,
-            slug: slug ?? undefined,
-            domain: domain ?? undefined,
-          },
-
-          resolvedTenantId: aggregate.tenant.id,
-        })
-      }
-    }
-
     if (!aggregate) {
       if (noThrow) {
         return null
@@ -84,12 +43,8 @@ export class TenantService {
 
     this.ensureTenantIsActive(aggregate.tenant)
 
-    const matchedDomain = this.extractMatchedDomain(aggregate)
-
     return {
       tenant: aggregate.tenant,
-      domains: aggregate.domains,
-      matchedDomain,
     }
   }
 
@@ -116,6 +71,10 @@ export class TenantService {
     return aggregate
   }
 
+  async deleteTenant(id: string): Promise<void> {
+    await this.repository.deleteById(id)
+  }
+
   private ensureTenantIsActive(tenant: TenantAggregate['tenant']): void {
     if (tenant.status === 'suspended') {
       throw new BizException(ErrorCode.TENANT_SUSPENDED)
@@ -138,22 +97,4 @@ export class TenantService {
     const normalized = this.normalizeString(value)
     return normalized ? normalized.toLowerCase() : null
   }
-
-  private normalizeDomain(value?: string | null): string | null {
-    const normalized = this.normalizeString(value)
-    if (!normalized) {
-      return null
-    }
-
-    return normalized.replace(/:\d+$/, '').toLowerCase()
-  }
-
-  private extractMatchedDomain(
-    aggregate: TenantAggregate | TenantDomainMatch,
-  ): TenantDomainMatch['matchedDomain'] | null {
-    if ('matchedDomain' in aggregate && aggregate.matchedDomain) {
-      return aggregate.matchedDomain
-    }
-    return null
-  }
 }
diff --git a/be/apps/core/src/modules/tenant/tenant.types.ts b/be/apps/core/src/modules/tenant/tenant.types.ts
index 1cb0f46e..9fa23bb6 100644
--- a/be/apps/core/src/modules/tenant/tenant.types.ts
+++ b/be/apps/core/src/modules/tenant/tenant.types.ts
@@ -1,31 +1,20 @@
-import type { tenantDomains, tenants, tenantStatusEnum } from '@afilmory/db'
+import type { tenants, tenantStatusEnum } from '@afilmory/db'
 
 export type TenantRecord = typeof tenants.$inferSelect
-export type TenantDomainRecord = typeof tenantDomains.$inferSelect
 export type TenantStatus = (typeof tenantStatusEnum.enumValues)[number]
 
 export interface TenantAggregate {
   tenant: TenantRecord
-  domains: TenantDomainRecord[]
 }
 
-export interface TenantDomainMatch extends TenantAggregate {
-  matchedDomain: TenantDomainRecord
-}
-
-export interface TenantContext extends TenantAggregate {
-  matchedDomain?: TenantDomainRecord | null
-}
+export type TenantContext = TenantAggregate
 
 export interface TenantResolutionInput {
   tenantId?: string | null
   slug?: string | null
-  domain?: string | null
-  fallbackToPrimary?: boolean
 }
 
 export interface TenantCacheEntry {
   aggregate: TenantAggregate
-  matchedDomain?: TenantDomainRecord | null
   cachedAt: number
 }
diff --git a/be/apps/dashboard/src/hooks/usePageRedirect.ts b/be/apps/dashboard/src/hooks/usePageRedirect.ts
index fe740c93..f332e800 100644
--- a/be/apps/dashboard/src/hooks/usePageRedirect.ts
+++ b/be/apps/dashboard/src/hooks/usePageRedirect.ts
@@ -6,20 +6,21 @@ import { useLocation, useNavigate } from 'react-router'
 import { useSetAuthUser } from '~/atoms/auth'
 import type { SessionResponse } from '~/modules/auth/api/session'
 import { AUTH_SESSION_QUERY_KEY, fetchSession } from '~/modules/auth/api/session'
-import { signOut } from '~/modules/auth/auth-client'
+import { signOutBySource } from '~/modules/auth/auth-client'
 import { getOnboardingStatus } from '~/modules/onboarding/api'
 
 const ONBOARDING_STATUS_QUERY_KEY = ['onboarding', 'status'] as const
 
 const DEFAULT_LOGIN_PATH = '/login'
 const DEFAULT_ONBOARDING_PATH = '/onboarding'
+const DEFAULT_REGISTER_PATH = '/register'
 const DEFAULT_AUTHENTICATED_PATH = '/'
 const SUPERADMIN_ROOT_PATH = '/superadmin'
 const SUPERADMIN_DEFAULT_PATH = '/superadmin/settings'
 
 const AUTH_FAILURE_STATUSES = new Set([401, 403, 419])
 
-const PUBLIC_PATHS = new Set([DEFAULT_LOGIN_PATH, DEFAULT_ONBOARDING_PATH])
+const PUBLIC_PATHS = new Set([DEFAULT_LOGIN_PATH, DEFAULT_ONBOARDING_PATH, DEFAULT_REGISTER_PATH])
 
 export function usePageRedirect() {
   const location = useLocation()
@@ -54,7 +55,7 @@ export function usePageRedirect() {
 
   const logout = useCallback(async () => {
     try {
-      await signOut()
+      await signOutBySource(sessionQuery.data?.source)
     } catch (error) {
       console.error('Logout error:', error)
     } finally {
@@ -63,7 +64,7 @@ export function usePageRedirect() {
       setAuthUser(null)
       navigate(DEFAULT_LOGIN_PATH, { replace: true })
     }
-  }, [navigate, queryClient, setAuthUser])
+  }, [navigate, queryClient, sessionQuery.data?.source, setAuthUser])
 
   // Sync auth user to atom
   useEffect(() => {
diff --git a/be/apps/dashboard/src/lib/query-client.ts b/be/apps/dashboard/src/lib/query-client.ts
index d66f4f61..214a23d7 100644
--- a/be/apps/dashboard/src/lib/query-client.ts
+++ b/be/apps/dashboard/src/lib/query-client.ts
@@ -1,6 +1,7 @@
 import { QueryClient } from '@tanstack/react-query'
 import { FetchError } from 'ofetch'
 
+const ignoreStatuses = new Set([400, 401, 403, 404, 409, 422, 402])
 const queryClient = new QueryClient({
   defaultOptions: {
     queries: {
@@ -8,6 +9,9 @@ const queryClient = new QueryClient({
       retryDelay: 1000,
       retry(failureCount, error) {
         console.error(error)
+        if (error instanceof FetchError && ignoreStatuses.has(error.statusCode!)) {
+          return false
+        }
         if (error instanceof FetchError && error.statusCode === undefined) {
           return false
         }
diff --git a/be/apps/dashboard/src/modules/analytics/components/AnalyticsPage.tsx b/be/apps/dashboard/src/modules/analytics/components/AnalyticsPage.tsx
index 0b98f9b9..3fc1899c 100644
--- a/be/apps/dashboard/src/modules/analytics/components/AnalyticsPage.tsx
+++ b/be/apps/dashboard/src/modules/analytics/components/AnalyticsPage.tsx
@@ -126,7 +126,7 @@ function UploadTrendsChart({ data }: { data: UploadTrendPoint[] }) {
             >
               <div className="bg-fill/15 relative flex h-40 w-full items-end overflow-hidden rounded-md">
                 <div
-                  className="bg-accent/70 group-hover:bg-accent absolute bottom-0 left-0 right-0 rounded-md transition-colors duration-200"
+                  className="bg-accent/70 group-hover:bg-accent absolute right-0 bottom-0 left-0 rounded-md transition-colors duration-200"
                   style={{ height: `${heightPercent}%` }}
                 />
               </div>
@@ -295,7 +295,7 @@ export function DashboardAnalytics() {
           ) : data?.uploadTrends?.length ? (
             <>
               {uploadTrendStats ? (
-                <div className="border-fill/20 mt-5 grid gap-3 rounded-lg border bg-fill/5 p-4 text-sm">
+                <div className="border-fill/20 bg-fill/5 mt-5 grid gap-3 rounded-lg border p-4 text-sm">
                   <div className="flex items-center justify-between">
                     <span className="text-text-secondary">累计上传</span>
                     <span className="text-text font-semibold">
@@ -364,7 +364,7 @@ export function DashboardAnalytics() {
 
               return (
                 <>
-                  <div className="border-fill/20 mt-5 grid gap-3 rounded-lg border bg-fill/5 p-4 text-sm">
+                  <div className="border-fill/20 bg-fill/5 mt-5 grid gap-3 rounded-lg border p-4 text-sm">
                     <div className="flex items-center justify-between">
                       <span className="text-text-secondary">总占用</span>
                       <span className="text-text font-semibold">{formatBytes(storageUsage.totalBytes)}</span>
diff --git a/be/apps/dashboard/src/modules/auth/api/registerTenant.ts b/be/apps/dashboard/src/modules/auth/api/registerTenant.ts
new file mode 100644
index 00000000..bca1dfaa
--- /dev/null
+++ b/be/apps/dashboard/src/modules/auth/api/registerTenant.ts
@@ -0,0 +1,26 @@
+import type { FetchResponse } from 'ofetch'
+
+import { coreApi } from '~/lib/api-client'
+
+export interface RegisterTenantAccountPayload {
+  email: string
+  password: string
+  name: string
+}
+
+export interface RegisterTenantPayload {
+  account: RegisterTenantAccountPayload
+  tenant: {
+    name: string
+    slug: string | null
+  }
+}
+
+export type RegisterTenantResult = FetchResponse<unknown>
+
+export async function registerTenant(payload: RegisterTenantPayload): Promise<RegisterTenantResult> {
+  return await coreApi.raw('/auth/tenants/sign-up', {
+    method: 'POST',
+    body: payload,
+  })
+}
diff --git a/be/apps/dashboard/src/modules/auth/api/session.ts b/be/apps/dashboard/src/modules/auth/api/session.ts
index 03ebba9e..5c08bc12 100644
--- a/be/apps/dashboard/src/modules/auth/api/session.ts
+++ b/be/apps/dashboard/src/modules/auth/api/session.ts
@@ -1,3 +1,5 @@
+import { FetchError } from 'ofetch'
+
 import { coreApi } from '~/lib/api-client'
 
 import type { BetterAuthSession, BetterAuthUser } from '../types'
@@ -5,12 +7,28 @@ import type { BetterAuthSession, BetterAuthUser } from '../types'
 export type SessionResponse = {
   user: BetterAuthUser
   session: BetterAuthSession
+  source?: 'global' | 'tenant'
 }
 
 export const AUTH_SESSION_QUERY_KEY = ['auth', 'session'] as const
 
 export async function fetchSession() {
-  return await coreApi<SessionResponse>('/auth/session', {
-    method: 'GET',
-  })
+  const fallbackStatus = new Set([401, 403, 404])
+
+  try {
+    const tenantSession = await coreApi<SessionResponse>('/tenant-auth/session', { method: 'GET' })
+    return { ...tenantSession, source: tenantSession.source ?? 'tenant' }
+  } catch (error) {
+    if (!(error instanceof FetchError)) {
+      throw error
+    }
+
+    const status = error.statusCode ?? error.response?.status ?? null
+    if (!status || !fallbackStatus.has(status)) {
+      throw error
+    }
+  }
+
+  const globalSession = await coreApi<SessionResponse>('/auth/session', { method: 'GET' })
+  return { ...globalSession, source: globalSession.source ?? 'global' }
 }
diff --git a/be/apps/dashboard/src/modules/auth/auth-client.ts b/be/apps/dashboard/src/modules/auth/auth-client.ts
index 2736640d..0254251c 100644
--- a/be/apps/dashboard/src/modules/auth/auth-client.ts
+++ b/be/apps/dashboard/src/modules/auth/auth-client.ts
@@ -1,16 +1,66 @@
 import { createAuthClient } from 'better-auth/react'
+import { FetchError } from 'ofetch'
 
-const apiBase = `${import.meta.env.VITE_APP_API_BASE?.replace(/\/$/, '') || '/api'}/auth`
+const apiBase = import.meta.env.VITE_APP_API_BASE?.replace(/\/$/, '') || '/api'
 
-const resolvedApiBase = resolveUrl(apiBase)
-export const authClient = createAuthClient({
-  baseURL: resolvedApiBase,
+const globalAuthBase = resolveUrl(`${apiBase}/auth`)
+const tenantAuthBase = resolveUrl(`${apiBase}/tenant-auth`)
+
+const commonOptions = {
   fetchOptions: {
-    credentials: 'include',
+    credentials: 'include' as const,
   },
+}
+
+export const globalAuthClient = createAuthClient({
+  baseURL: globalAuthBase,
+  ...commonOptions,
 })
 
-export const { signIn, signOut, useSession } = authClient
+export const tenantAuthClient = createAuthClient({
+  baseURL: tenantAuthBase,
+  ...commonOptions,
+})
+
+const { useSession } = globalAuthClient
+const { signIn: globalRawSignIn, signOut: globalRawSignOut } = globalAuthClient
+const { signIn: tenantRawSignIn, signOut: tenantRawSignOut } = tenantAuthClient
+
+export { useSession }
+
+export const signInGlobal = globalRawSignIn
+export const signInTenant = tenantRawSignIn
+
+export const signOutGlobal = globalRawSignOut
+export const signOutTenant = tenantRawSignOut
+
+export async function signOutBySource(source?: 'global' | 'tenant') {
+  const targets: Array<'global' | 'tenant'> = source ? [source] : ['tenant', 'global']
+  let lastError: unknown = null
+  const recoverableStatuses = new Set([401, 403, 404])
+
+  for (const target of targets) {
+    try {
+      if (target === 'tenant') {
+        await tenantAuthClient.signOut()
+      } else {
+        await globalAuthClient.signOut()
+      }
+    } catch (error) {
+      if (error instanceof FetchError) {
+        const status = error.statusCode ?? error.response?.status ?? null
+        if (status && recoverableStatuses.has(status)) {
+          continue
+        }
+      }
+      lastError = error
+    }
+  }
+
+  if (lastError) {
+    throw lastError
+  }
+}
 
 function resolveUrl(url: string): string {
   if (url.startsWith('/')) {
diff --git a/be/apps/dashboard/src/modules/auth/components/RegistrationWizard.tsx b/be/apps/dashboard/src/modules/auth/components/RegistrationWizard.tsx
new file mode 100644
index 00000000..0023ebd0
--- /dev/null
+++ b/be/apps/dashboard/src/modules/auth/components/RegistrationWizard.tsx
@@ -0,0 +1,629 @@
+import { Button, Checkbox, FormError, Input, Label, ScrollArea } from '@afilmory/ui'
+import { cx, Spring } from '@afilmory/utils'
+import { m } from 'motion/react'
+import type { FC, KeyboardEvent } from 'react'
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { Link } from 'react-router'
+
+import { useRegisterTenant } from '~/modules/auth/hooks/useRegisterTenant'
+import type { TenantRegistrationFormState } from '~/modules/auth/hooks/useRegistrationForm'
+import { useRegistrationForm } from '~/modules/auth/hooks/useRegistrationForm'
+import { LinearBorderContainer } from '~/modules/onboarding/components/LinearBorderContainer'
+
+const REGISTRATION_STEPS = [
+  {
+    id: 'workspace',
+    title: 'Workspace details',
+    description: 'Give your workspace a recognizable name and choose a slug for tenant URLs.',
+  },
+  {
+    id: 'admin',
+    title: 'Administrator account',
+    description: 'Set up the primary administrator who will manage the workspace after creation.',
+  },
+  {
+    id: 'review',
+    title: 'Review & confirm',
+    description: 'Verify everything looks right and accept the terms before provisioning the workspace.',
+  },
+] as const satisfies ReadonlyArray<{
+  id: 'workspace' | 'admin' | 'review'
+  title: string
+  description: string
+}>
+
+const STEP_FIELDS: Record<(typeof REGISTRATION_STEPS)[number]['id'], Array<keyof TenantRegistrationFormState>> = {
+  workspace: ['tenantName', 'tenantSlug'],
+  admin: ['accountName', 'email', 'password', 'confirmPassword'],
+  review: ['termsAccepted'],
+}
+
+const progressForStep = (index: number) => Math.round((index / (REGISTRATION_STEPS.length - 1 || 1)) * 100)
+
+type SidebarProps = {
+  currentStepIndex: number
+  canNavigateTo: (index: number) => boolean
+  onStepSelect: (index: number) => void
+}
+
+const RegistrationSidebar: FC<SidebarProps> = ({ currentStepIndex, canNavigateTo, onStepSelect }) => (
+  <aside className="hidden min-h-full flex-col gap-6 p-6 lg:flex">
+    <div>
+      <p className="text-accent text-xs font-medium">Workspace Setup</p>
+      <h2 className="text-text mt-2 text-base font-semibold">Create your tenant</h2>
+    </div>
+
+    <div className="relative flex-1">
+      {REGISTRATION_STEPS.map((step, index) => {
+        const status: 'done' | 'current' | 'pending' =
+          index < currentStepIndex ? 'done' : index === currentStepIndex ? 'current' : 'pending'
+        const isLast = index === REGISTRATION_STEPS.length - 1
+        const isClickable = canNavigateTo(index)
+
+        return (
+          <div key={step.id} className="relative flex gap-3">
+            {!isLast && (
+              <div className="absolute top-7 bottom-0 left-[13px] w-[1.5px]">
+                {status === 'done' && <div className="bg-accent h-full w-full" />}
+                {status === 'current' && (
+                  <div
+                    className="h-full w-full"
+                    style={{
+                      background:
+                        'linear-gradient(to bottom, var(--color-accent) 0%, var(--color-accent) 35%, color-mix(in srgb, var(--color-text) 15%, transparent) 100%)',
+                    }}
+                  />
+                )}
+                {status === 'pending' && <div className="bg-text/15 h-full w-full" />}
+              </div>
+            )}
+
+            <button
+              type="button"
+              className={cx(
+                'group relative flex w-full items-start gap-3 pb-6 text-left transition-all duration-200',
+                isClickable ? 'cursor-pointer' : 'cursor-default',
+                !isClickable && 'opacity-60',
+              )}
+              onClick={() => {
+                if (isClickable) onStepSelect(index)
+              }}
+              disabled={!isClickable}
+            >
+              <div className="relative z-10 shrink-0 pt-0.5">
+                <div
+                  className={cx(
+                    'flex h-7 w-7 items-center justify-center rounded-full text-xs font-semibold transition-all duration-200',
+                    status === 'done' && 'bg-accent text-white ring-4 ring-accent/10',
+                    status === 'current' && 'bg-accent text-white ring-4 ring-accent/25',
+                    status === 'pending' && 'border-[1.5px] border-text/20 bg-background text-text-tertiary',
+                  )}
+                >
+                  {status === 'done' ? <i className="i-mingcute-check-fill text-sm" /> : <span>{index + 1}</span>}
+                </div>
+              </div>
+
+              <div className="min-w-0 flex-1 pt-0.5">
+                <p
+                  className={cx(
+                    'text-sm font-medium transition-colors duration-200',
+                    status === 'done' && 'text-text',
+                    status === 'current' && 'text-accent',
+                    status === 'pending' && 'text-text-tertiary',
+                    isClickable && status !== 'current' && 'group-hover:text-text',
+                  )}
+                >
+                  {step.title}
+                </p>
+                <p
+                  className={cx(
+                    'mt-0.5 text-xs transition-colors duration-200',
+                    status === 'done' && 'text-text-secondary',
+                    status === 'current' && 'text-text-secondary',
+                    status === 'pending' && 'text-text-tertiary',
+                  )}
+                >
+                  {step.description}
+                </p>
+              </div>
+            </button>
+          </div>
+        )
+      })}
+    </div>
+
+    <div className="pt-4">
+      <div className="via-text/20 mb-4 h-[0.5px] bg-linear-to-r from-transparent to-transparent" />
+      <div className="text-text-tertiary mb-2 flex items-center justify-between text-xs">
+        <span>Progress</span>
+        <span className="text-accent font-medium">{progressForStep(currentStepIndex)}%</span>
+      </div>
+      <div className="bg-fill-tertiary relative h-1.5 overflow-hidden rounded-full">
+        <div
+          className="bg-accent absolute top-0 left-0 h-full transition-all duration-500 ease-out"
+          style={{ width: `${progressForStep(currentStepIndex)}%` }}
+        />
+      </div>
+    </div>
+  </aside>
+)
+
+type HeaderProps = {
+  currentStepIndex: number
+}
+
+const RegistrationHeader: FC<HeaderProps> = ({ currentStepIndex }) => {
+  const step = REGISTRATION_STEPS[currentStepIndex]
+  return (
+    <header className="p-8 pb-6">
+      <div className="bg-accent/10 text-accent inline-flex items-center gap-2 rounded-lg px-3 py-1.5 text-xs font-medium">
+        Step {currentStepIndex + 1} of {REGISTRATION_STEPS.length}
+      </div>
+      <h1 className="text-text mt-4 text-3xl font-bold">{step.title}</h1>
+      <p className="text-text-secondary mt-2 max-w-2xl text-sm">{step.description}</p>
+    </header>
+  )
+}
+
+type FooterProps = {
+  disableBack: boolean
+  isSubmitting: boolean
+  isLastStep: boolean
+  onBack: () => void
+  onNext: () => void
+}
+
+const RegistrationFooter: FC<FooterProps> = ({ disableBack, isSubmitting, isLastStep, onBack, onNext }) => (
+  <footer className="flex flex-col gap-3 p-8 pt-6 sm:flex-row sm:items-center sm:justify-between">
+    {!disableBack ? (
+      <div className="text-text-tertiary text-xs">
+        Adjustments are always possible—use the sidebar or go back to modify earlier details.
+      </div>
+    ) : (
+      <div />
+    )}
+    <div className="flex gap-2">
+      {!disableBack && (
+        <Button
+          type="button"
+          variant="ghost"
+          size="md"
+          className="text-text-secondary hover:text-text hover:bg-fill/50 min-w-[140px]"
+          onClick={onBack}
+          disabled={isSubmitting}
+        >
+          Back
+        </Button>
+      )}
+      <Button type="button" variant="primary" size="md" className="min-w-40" onClick={onNext} isLoading={isSubmitting}>
+        {isLastStep ? 'Create workspace' : 'Continue'}
+      </Button>
+    </div>
+  </footer>
+)
+
+type StepCommonProps = {
+  values: TenantRegistrationFormState
+  errors: Partial<Record<keyof TenantRegistrationFormState, string>>
+  onFieldChange: <Field extends keyof TenantRegistrationFormState>(
+    field: Field,
+    value: TenantRegistrationFormState[Field],
+  ) => void
+  isLoading: boolean
+}
+
+const WorkspaceStep: FC<StepCommonProps> = ({ values, errors, onFieldChange, isLoading }) => (
+  <div className="space-y-8">
+    <section className="space-y-3">
+      <h2 className="text-text text-lg font-semibold">Workspace basics</h2>
+      <p className="text-text-secondary text-sm">
+        This information appears in navigation, invitations, and other tenant-facing areas.
+      </p>
+    </section>
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="space-y-2">
+        <Label htmlFor="tenant-name">Workspace name</Label>
+        <Input
+          id="tenant-name"
+          value={values.tenantName}
+          onChange={(event) => onFieldChange('tenantName', event.currentTarget.value)}
+          placeholder="Acme Studio"
+          disabled={isLoading}
+          error={Boolean(errors.tenantName)}
+          autoComplete="organization"
+        />
+        <FormError>{errors.tenantName}</FormError>
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="tenant-slug">Workspace slug</Label>
+        <Input
+          id="tenant-slug"
+          value={values.tenantSlug}
+          onChange={(event) => onFieldChange('tenantSlug', event.currentTarget.value)}
+          placeholder="acme"
+          disabled={isLoading}
+          error={Boolean(errors.tenantSlug)}
+          autoComplete="off"
+        />
+        <p className="text-text-tertiary text-xs">
+          Lowercase letters, numbers, and hyphen are allowed. We&apos;ll ensure the slug is unique.
+        </p>
+        <FormError>{errors.tenantSlug}</FormError>
+      </div>
+    </div>
+  </div>
+)
+
+const AdminStep: FC<StepCommonProps> = ({ values, errors, onFieldChange, isLoading }) => (
+  <div className="space-y-8">
+    <section className="space-y-3">
+      <h2 className="text-text text-lg font-semibold">Administrator</h2>
+      <p className="text-text-secondary text-sm">
+        The first user becomes the workspace administrator and can invite additional members later.
+      </p>
+    </section>
+    <div className="grid gap-6 md:grid-cols-2">
+      <div className="space-y-2">
+        <Label htmlFor="account-name">Full name</Label>
+        <Input
+          id="account-name"
+          value={values.accountName}
+          onChange={(event) => onFieldChange('accountName', event.currentTarget.value)}
+          placeholder="Jane Doe"
+          disabled={isLoading}
+          error={Boolean(errors.accountName)}
+          autoComplete="name"
+        />
+        <FormError>{errors.accountName}</FormError>
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="account-email">Work email</Label>
+        <Input
+          id="account-email"
+          type="email"
+          value={values.email}
+          onChange={(event) => onFieldChange('email', event.currentTarget.value)}
+          placeholder="jane@acme.studio"
+          disabled={isLoading}
+          error={Boolean(errors.email)}
+          autoComplete="email"
+        />
+        <FormError>{errors.email}</FormError>
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="account-password">Password</Label>
+        <Input
+          id="account-password"
+          type="password"
+          value={values.password}
+          onChange={(event) => onFieldChange('password', event.currentTarget.value)}
+          placeholder="Create a strong password"
+          disabled={isLoading}
+          error={Boolean(errors.password)}
+          autoComplete="new-password"
+        />
+        <FormError>{errors.password}</FormError>
+      </div>
+      <div className="space-y-2">
+        <Label htmlFor="account-confirm-password">Confirm password</Label>
+        <Input
+          id="account-confirm-password"
+          type="password"
+          value={values.confirmPassword}
+          onChange={(event) => onFieldChange('confirmPassword', event.currentTarget.value)}
+          placeholder="Repeat your password"
+          disabled={isLoading}
+          error={Boolean(errors.confirmPassword)}
+          autoComplete="new-password"
+        />
+        <FormError>{errors.confirmPassword}</FormError>
+      </div>
+    </div>
+    <p className="text-text-tertiary text-xs">
+      We recommend using a secure password manager to store credentials for critical roles like the administrator.
+    </p>
+  </div>
+)
+
+type ReviewStepProps = Omit<StepCommonProps, 'onFieldChange'> & {
+  onToggleTerms: (value: boolean) => void
+  serverError: string | null
+}
+
+const ReviewStep: FC<ReviewStepProps> = ({ values, errors, onToggleTerms, isLoading, serverError }) => (
+  <div className="space-y-8">
+    <section className="space-y-3">
+      <h2 className="text-text text-lg font-semibold">Confirm workspace configuration</h2>
+      <p className="text-text-secondary text-sm">
+        Double-check the details below. You can go back to make adjustments before creating the workspace.
+      </p>
+    </section>
+    <dl className="bg-fill/40 border border-white/5 grid gap-x-6 gap-y-4 rounded-2xl p-6 md:grid-cols-2">
+      <div>
+        <dt className="text-text-tertiary text-xs uppercase tracking-wide">Workspace name</dt>
+        <dd className="text-text mt-1 text-sm font-medium">{values.tenantName || '—'}</dd>
+      </div>
+      <div>
+        <dt className="text-text-tertiary text-xs uppercase tracking-wide">Workspace slug</dt>
+        <dd className="text-text mt-1 text-sm font-medium">{values.tenantSlug || '—'}</dd>
+      </div>
+      <div>
+        <dt className="text-text-tertiary text-xs uppercase tracking-wide">Administrator name</dt>
+        <dd className="text-text mt-1 text-sm font-medium">{values.accountName || '—'}</dd>
+      </div>
+      <div>
+        <dt className="text-text-tertiary text-xs uppercase tracking-wide">Administrator email</dt>
+        <dd className="text-text mt-1 text-sm font-medium">{values.email || '—'}</dd>
+      </div>
+    </dl>
+
+    {serverError && (
+      <m.div
+        initial={{ opacity: 0, height: 0 }}
+        animate={{ opacity: 1, height: 'auto' }}
+        exit={{ opacity: 0, height: 0 }}
+        transition={Spring.presets.snappy}
+        className="border-red/60 bg-red/10 rounded-xl border px-4 py-3"
+      >
+        <p className="text-red text-sm">{serverError}</p>
+      </m.div>
+    )}
+
+    <section className="space-y-3">
+      <h3 className="text-text text-base font-semibold">Policies</h3>
+      <p className="text-text-tertiary text-sm">
+        Creating a workspace means you agree to comply with our usage guidelines and privacy practices.
+      </p>
+      <div className="space-y-2">
+        <label className="text-text flex items-center gap-3 text-sm">
+          <Checkbox
+            checked={values.termsAccepted}
+            onCheckedChange={(checked) => onToggleTerms(checked === true)}
+            disabled={isLoading}
+            className="mt-0.5"
+          />
+          <span className="text-text-secondary">
+            I agree to the{' '}
+            <a href="/terms" target="_blank" rel="noreferrer" className="text-accent hover:underline">
+              Terms of Service
+            </a>{' '}
+            and{' '}
+            <a href="/privacy" target="_blank" rel="noreferrer" className="text-accent hover:underline">
+              Privacy Policy
+            </a>
+            .
+          </span>
+        </label>
+        <FormError>{errors.termsAccepted}</FormError>
+      </div>
+    </section>
+  </div>
+)
+
+export const RegistrationWizard: FC = () => {
+  const { values, errors, updateValue, validate, getFieldError } = useRegistrationForm()
+  const { registerTenant, isLoading, error, clearError } = useRegisterTenant()
+  const [currentStepIndex, setCurrentStepIndex] = useState(0)
+  const [maxVisitedIndex, setMaxVisitedIndex] = useState(0)
+  const contentRef = useRef<HTMLElement | null>(null)
+
+  useEffect(() => {
+    const root = contentRef.current
+    if (!root) return
+
+    const rafId = requestAnimationFrame(() => {
+      const selector = [
+        'input:not([type="hidden"]):not([disabled])',
+        'textarea:not([disabled])',
+        'select:not([disabled])',
+        '[contenteditable="true"]',
+        '[tabindex]:not([tabindex="-1"])',
+      ].join(',')
+
+      const candidates = Array.from(root.querySelectorAll<HTMLElement>(selector))
+      const firstVisible = candidates.find((el) => {
+        if (el.getAttribute('aria-hidden') === 'true') return false
+        const rect = el.getBoundingClientRect()
+        if (rect.width === 0 || rect.height === 0) return false
+        if ((el as HTMLInputElement).disabled) return false
+        return true
+      })
+
+      firstVisible?.focus({ preventScroll: true })
+    })
+
+    return () => cancelAnimationFrame(rafId)
+  }, [currentStepIndex])
+
+  const canNavigateTo = useCallback((index: number) => index <= maxVisitedIndex, [maxVisitedIndex])
+
+  const jumpToStep = useCallback(
+    (index: number) => {
+      if (isLoading) return
+      if (index === currentStepIndex) return
+      if (!canNavigateTo(index)) return
+      if (error) clearError()
+      setCurrentStepIndex(index)
+      setMaxVisitedIndex((prev) => Math.max(prev, index))
+    },
+    [canNavigateTo, clearError, currentStepIndex, error, isLoading],
+  )
+
+  const handleFieldChange = useCallback(
+    <Field extends keyof TenantRegistrationFormState>(field: Field, value: TenantRegistrationFormState[Field]) => {
+      updateValue(field, value)
+      if (error) clearError()
+    },
+    [clearError, error, updateValue],
+  )
+
+  const handleBack = useCallback(() => {
+    if (isLoading) return
+    if (currentStepIndex === 0) return
+    if (error) clearError()
+    setCurrentStepIndex((prev) => Math.max(0, prev - 1))
+  }, [clearError, currentStepIndex, error, isLoading])
+
+  const focusFirstInvalidStep = useCallback(() => {
+    const invalidStepIndex = REGISTRATION_STEPS.findIndex((step) =>
+      STEP_FIELDS[step.id].some((field) => Boolean(getFieldError(field))),
+    )
+
+    if (invalidStepIndex !== -1 && invalidStepIndex !== currentStepIndex) {
+      setCurrentStepIndex(invalidStepIndex)
+      setMaxVisitedIndex((prev) => Math.max(prev, invalidStepIndex))
+    }
+  }, [currentStepIndex, getFieldError])
+
+  const handleNext = useCallback(() => {
+    if (isLoading) return
+
+    const step = REGISTRATION_STEPS[currentStepIndex]
+    const fields = STEP_FIELDS[step.id]
+
+    const isStepValid = validate(fields)
+    if (!isStepValid) {
+      focusFirstInvalidStep()
+      return
+    }
+
+    if (step.id === 'review') {
+      const formIsValid = validate()
+      if (!formIsValid) {
+        focusFirstInvalidStep()
+        return
+      }
+
+      if (error) clearError()
+
+      registerTenant({
+        tenantName: values.tenantName,
+        tenantSlug: values.tenantSlug,
+        accountName: values.accountName,
+        email: values.email,
+        password: values.password,
+      })
+      return
+    }
+
+    setCurrentStepIndex((prev) => {
+      const nextIndex = Math.min(REGISTRATION_STEPS.length - 1, prev + 1)
+      setMaxVisitedIndex((visited) => Math.max(visited, nextIndex))
+      return nextIndex
+    })
+  }, [
+    clearError,
+    currentStepIndex,
+    error,
+    focusFirstInvalidStep,
+    isLoading,
+    registerTenant,
+    validate,
+    values.accountName,
+    values.email,
+    values.password,
+    values.tenantName,
+    values.tenantSlug,
+  ])
+
+  const handleKeyDown = useCallback(
+    (event: KeyboardEvent) => {
+      if (event.key !== 'Enter') return
+      if (event.shiftKey || event.metaKey || event.ctrlKey || event.altKey) return
+      const nativeEvent = event.nativeEvent as unknown as { isComposing?: boolean }
+      if (nativeEvent?.isComposing) return
+
+      const target = event.target as HTMLElement
+      if (target.isContentEditable) return
+      if (target.tagName === 'TEXTAREA') return
+      if (target.tagName === 'BUTTON' || target.tagName === 'A') return
+      if (target.tagName === 'INPUT') {
+        const { type } = target as HTMLInputElement
+        if (type === 'checkbox' || type === 'radio') return
+      }
+
+      event.preventDefault()
+      handleNext()
+    },
+    [handleNext],
+  )
+
+  const StepComponent = useMemo(() => {
+    const step = REGISTRATION_STEPS[currentStepIndex]
+    switch (step.id) {
+      case 'workspace': {
+        return <WorkspaceStep values={values} errors={errors} onFieldChange={handleFieldChange} isLoading={isLoading} />
+      }
+      case 'admin': {
+        return <AdminStep values={values} errors={errors} onFieldChange={handleFieldChange} isLoading={isLoading} />
+      }
+      case 'review': {
+        return (
+          <ReviewStep
+            values={values}
+            errors={errors}
+            onToggleTerms={(accepted) => handleFieldChange('termsAccepted', accepted)}
+            isLoading={isLoading}
+            serverError={error}
+          />
+        )
+      }
+      default: {
+        return null
+      }
+    }
+  }, [currentStepIndex, error, errors, handleFieldChange, isLoading, values])
+
+  const isLastStep = currentStepIndex === REGISTRATION_STEPS.length - 1
+
+  return (
+    <div className="bg-background flex min-h-screen flex-col items-center justify-center px-4 py-10">
+      <LinearBorderContainer className="bg-background-tertiary h-[85vh] w-full max-w-5xl">
+        <div className="grid h-full lg:grid-cols-[280px_1fr]">
+          <div className="relative h-full">
+            <div className="via-text/20 absolute top-0 right-0 bottom-0 w-[0.5px] bg-linear-to-b from-transparent to-transparent" />
+            <RegistrationSidebar
+              currentStepIndex={currentStepIndex}
+              canNavigateTo={canNavigateTo}
+              onStepSelect={jumpToStep}
+            />
+          </div>
+
+          <main className="flex h-full w-[700px] flex-col">
+            <div className="shrink-0">
+              <RegistrationHeader currentStepIndex={currentStepIndex} />
+              <div className="via-text/20 h-[0.5px] bg-linear-to-r from-transparent to-transparent" />
+            </div>
+
+            <div className="relative flex h-0 flex-1">
+              <ScrollArea rootClassName="absolute! inset-0 h-full w-full">
+                <section ref={contentRef} className="p-12" onKeyDown={handleKeyDown}>
+                  {StepComponent}
+                </section>
+              </ScrollArea>
+            </div>
+
+            <div className="shrink-0">
+              <div className="via-text/20 h-[0.5px] bg-linear-to-r from-transparent to-transparent" />
+              <RegistrationFooter
+                disableBack={currentStepIndex === 0}
+                isSubmitting={isLoading}
+                isLastStep={isLastStep}
+                onBack={handleBack}
+                onNext={handleNext}
+              />
+            </div>
+          </main>
+        </div>
+      </LinearBorderContainer>
+
+      <p className="text-text-tertiary mt-6 text-sm">
+        Already have an account?{' '}
+        <Link to="/login" className="text-accent hover:underline">
+          Sign in
+        </Link>
+        .
+      </p>
+    </div>
+  )
+}
diff --git a/be/apps/dashboard/src/modules/auth/hooks/useLogin.ts b/be/apps/dashboard/src/modules/auth/hooks/useLogin.ts
index a33a5ce3..6b4af364 100644
--- a/be/apps/dashboard/src/modules/auth/hooks/useLogin.ts
+++ b/be/apps/dashboard/src/modules/auth/hooks/useLogin.ts
@@ -6,7 +6,7 @@ import { useNavigate } from 'react-router'
 import { useSetAuthUser } from '~/atoms/auth'
 import { AUTH_SESSION_QUERY_KEY, fetchSession } from '~/modules/auth/api/session'
 
-import { signIn } from '../auth-client'
+import { signInGlobal, signInTenant } from '../auth-client'
 
 export interface LoginRequest {
   email: string
@@ -22,15 +22,42 @@ export function useLogin() {
 
   const loginMutation = useMutation({
     mutationFn: async (data: LoginRequest) => {
-      // Use Better Auth endpoint via backend controller
-      // Backend forwards headers to Better Auth and returns the Response
-      // We don't need the response body here; cookies are set via Set-Cookie
-      await signIn.email({
+      const rememberMe = data.rememberMe ?? true
+      const fallbackStatuses = new Set([400, 401, 403, 404])
+
+      const attemptTenant = async () => {
+        try {
+          await signInTenant.email({
+            email: data.email,
+            password: data.password,
+            rememberMe,
+          })
+          return await queryClient.fetchQuery({
+            queryKey: AUTH_SESSION_QUERY_KEY,
+            queryFn: fetchSession,
+          })
+        } catch (error) {
+          if (error instanceof FetchError) {
+            const status = error.statusCode ?? error.response?.status ?? null
+            if (status && fallbackStatuses.has(status)) {
+              return null
+            }
+          }
+          throw error
+        }
+      }
+
+      const tenantSession = await attemptTenant()
+      if (tenantSession) {
+        return tenantSession
+      }
+
+      await signInGlobal.email({
         email: data.email,
         password: data.password,
-        rememberMe: data.rememberMe ?? true,
+        rememberMe,
       })
-      // After login, refetch session
+
       return await queryClient.fetchQuery({
         queryKey: AUTH_SESSION_QUERY_KEY,
         queryFn: fetchSession,
@@ -47,13 +74,14 @@ export function useLogin() {
     onError: (error: Error) => {
       if (error instanceof FetchError) {
         const status = error.statusCode ?? error.response?.status
+        const serverMessage = (error.data as any)?.message
         switch (status) {
           case 401: {
-            setErrorMessage('Invalid email or password')
+            setErrorMessage(serverMessage || 'Invalid email or password')
             break
           }
           case 403: {
-            setErrorMessage('Access denied')
+            setErrorMessage(serverMessage || 'Access denied')
             break
           }
           case 429: {
@@ -61,7 +89,7 @@ export function useLogin() {
             break
           }
           default: {
-            setErrorMessage((error.data as any)?.message || error.message || 'Login failed. Please try again')
+            setErrorMessage(serverMessage || error.message || 'Login failed. Please try again')
           }
         }
       } else {
diff --git a/be/apps/dashboard/src/modules/auth/hooks/useRegisterTenant.ts b/be/apps/dashboard/src/modules/auth/hooks/useRegisterTenant.ts
new file mode 100644
index 00000000..deed59ca
--- /dev/null
+++ b/be/apps/dashboard/src/modules/auth/hooks/useRegisterTenant.ts
@@ -0,0 +1,154 @@
+import { useMutation } from '@tanstack/react-query'
+import { FetchError } from 'ofetch'
+import { useState } from 'react'
+
+import type { RegisterTenantPayload } from '~/modules/auth/api/registerTenant'
+import { registerTenant } from '~/modules/auth/api/registerTenant'
+
+interface TenantRegistrationRequest {
+  tenantName: string
+  tenantSlug: string
+  accountName: string
+  email: string
+  password: string
+}
+
+const SECOND_LEVEL_PUBLIC_SUFFIXES = new Set(['ac', 'co', 'com', 'edu', 'gov', 'net', 'org'])
+
+function resolveBaseDomain(hostname: string): string {
+  const envValue = (import.meta.env as Record<string, unknown> | undefined)?.VITE_APP_TENANT_BASE_DOMAIN
+  if (typeof envValue === 'string' && envValue.trim().length > 0) {
+    return envValue.trim().replace(/^\./, '').toLowerCase()
+  }
+
+  if (!hostname) {
+    return ''
+  }
+
+  if (hostname === 'localhost' || hostname.endsWith('.localhost')) {
+    return 'localhost'
+  }
+
+  const parts = hostname.split('.').filter(Boolean)
+  if (parts.length <= 2) {
+    return hostname
+  }
+
+  const tld = parts.at(-1) ?? ''
+  const secondLevel = parts.at(-2) ?? ''
+
+  if (tld.length === 2 && SECOND_LEVEL_PUBLIC_SUFFIXES.has(secondLevel) && parts.length >= 3) {
+    return parts.slice(-3).join('.').toLowerCase()
+  }
+
+  return parts.slice(-2).join('.').toLowerCase()
+}
+
+function buildTenantLoginUrl(slug: string): string {
+  const normalizedSlug = slug.trim().toLowerCase()
+  if (!normalizedSlug) {
+    throw new Error('Registration succeeded but a workspace slug was not returned.')
+  }
+
+  const { protocol, hostname, port } = window.location
+  const baseDomain = resolveBaseDomain(hostname)
+
+  if (!baseDomain) {
+    throw new Error('Unable to resolve base domain for workspace login redirect.')
+  }
+
+  const shouldAppendPort = Boolean(
+    port && (baseDomain === 'localhost' || hostname === baseDomain || hostname.endsWith(`.${baseDomain}`)),
+  )
+
+  const portSegment = shouldAppendPort ? `:${port}` : ''
+  const scheme = protocol || 'https:'
+
+  return `${scheme}//${normalizedSlug}.${baseDomain}${portSegment}/login`
+}
+
+export function useRegisterTenant() {
+  const [errorMessage, setErrorMessage] = useState<string | null>(null)
+
+  const mutation = useMutation({
+    mutationFn: async (data: TenantRegistrationRequest) => {
+      const payload: RegisterTenantPayload = {
+        tenant: {
+          name: data.tenantName.trim(),
+          slug: data.tenantSlug.trim(),
+        },
+        account: {
+          name: data.accountName.trim() || data.email.trim(),
+          email: data.email.trim(),
+          password: data.password,
+        },
+      }
+
+      const response = await registerTenant(payload)
+
+      const headerSlug = response.headers.get('x-tenant-slug')?.trim().toLowerCase() ?? null
+      const submittedSlug = payload.tenant.slug?.trim().toLowerCase() ?? ''
+      const finalSlug = headerSlug && headerSlug.length > 0 ? headerSlug : submittedSlug
+
+      if (!finalSlug) {
+        throw new Error('Registration succeeded but the workspace slug could not be determined.')
+      }
+
+      return {
+        slug: finalSlug,
+      }
+    },
+    onSuccess: ({ slug }) => {
+      try {
+        const loginUrl = buildTenantLoginUrl(slug)
+        setErrorMessage(null)
+        window.location.replace(loginUrl)
+      } catch (redirectError) {
+        if (redirectError instanceof Error) {
+          setErrorMessage(redirectError.message)
+        } else {
+          setErrorMessage('Registration succeeded but redirect failed. Please use your workspace URL to sign in.')
+        }
+      }
+    },
+    onError: (error: Error) => {
+      if (error instanceof FetchError) {
+        const status = error.statusCode ?? error.response?.status
+        const serverMessage = (error.data as any)?.message
+
+        switch (status) {
+          case 400: {
+            setErrorMessage(serverMessage || 'Please verify your inputs and try again')
+            break
+          }
+          case 403: {
+            setErrorMessage(serverMessage || 'Registration is currently disabled')
+            break
+          }
+          case 409: {
+            setErrorMessage(serverMessage || 'An account or workspace with these details already exists')
+            break
+          }
+          case 429: {
+            setErrorMessage('Too many attempts. Please try again later')
+            break
+          }
+          default: {
+            setErrorMessage(serverMessage || error.message || 'Registration failed. Please try again')
+          }
+        }
+      } else {
+        setErrorMessage(error.message || 'An unexpected error occurred. Please try again')
+      }
+    },
+  })
+
+  const clearError = () => setErrorMessage(null)
+
+  return {
+    registerTenant: mutation.mutate,
+    isLoading: mutation.isPending,
+    error: errorMessage,
+    clearError,
+  }
+}
diff --git a/be/apps/dashboard/src/modules/auth/hooks/useRegistrationForm.ts b/be/apps/dashboard/src/modules/auth/hooks/useRegistrationForm.ts
new file mode 100644
index 00000000..e17cb64d
--- /dev/null
+++ b/be/apps/dashboard/src/modules/auth/hooks/useRegistrationForm.ts
@@ -0,0 +1,156 @@
+import { useState } from 'react'
+
+import { isLikelyEmail, slugify } from '~/modules/onboarding/utils'
+
+export interface TenantRegistrationFormState {
+  tenantName: string
+  tenantSlug: string
+  accountName: string
+  email: string
+  password: string
+  confirmPassword: string
+  termsAccepted: boolean
+}
+
+const REQUIRED_PASSWORD_LENGTH = 8
+const ALL_FIELDS: Array<keyof TenantRegistrationFormState> = [
+  'tenantName',
+  'tenantSlug',
+  'accountName',
+  'email',
+  'password',
+  'confirmPassword',
+  'termsAccepted',
+]
+
+export function useRegistrationForm(initial?: Partial<TenantRegistrationFormState>) {
+  const [values, setValues] = useState<TenantRegistrationFormState>({
+    tenantName: initial?.tenantName ?? '',
+    tenantSlug: initial?.tenantSlug ?? '',
+    accountName: initial?.accountName ?? '',
+    email: initial?.email ?? '',
+    password: initial?.password ?? '',
+    confirmPassword: initial?.confirmPassword ?? '',
+    termsAccepted: initial?.termsAccepted ?? false,
+  })
+  const [errors, setErrors] = useState<Partial<Record<keyof TenantRegistrationFormState, string>>>({})
+  const [slugManuallyEdited, setSlugManuallyEdited] = useState(false)
+
+  const updateValue = <K extends keyof TenantRegistrationFormState>(
+    field: K,
+    value: TenantRegistrationFormState[K],
+  ) => {
+    setValues((prev) => {
+      if (field === 'tenantName' && !slugManuallyEdited) {
+        return {
+          ...prev,
+          tenantName: value as string,
+          tenantSlug: slugify(value as string),
+        }
+      }
+
+      if (field === 'tenantSlug') {
+        setSlugManuallyEdited(true)
+      }
+
+      return { ...prev, [field]: value }
+    })
+    setErrors((prev) => {
+      const next = { ...prev }
+      delete next[field]
+      return next
+    })
+  }
+
+  const fieldError = (field: keyof TenantRegistrationFormState): string | undefined => {
+    switch (field) {
+      case 'tenantName': {
+        return values.tenantName.trim() ? undefined : 'Workspace name is required'
+      }
+      case 'tenantSlug': {
+        const slug = values.tenantSlug.trim()
+        if (!slug) return 'Slug is required'
+        if (!/^[a-z0-9-]+$/.test(slug)) return 'Use lowercase letters, numbers, and hyphen only'
+        return undefined
+      }
+      case 'email': {
+        const email = values.email.trim()
+        if (!email) return 'Email is required'
+        if (!isLikelyEmail(email)) return 'Enter a valid email address'
+        return undefined
+      }
+      case 'accountName': {
+        return values.accountName.trim() ? undefined : 'Administrator name is required'
+      }
+      case 'password': {
+        if (!values.password) return 'Password is required'
+        if (values.password.length < REQUIRED_PASSWORD_LENGTH) {
+          return `Password must be at least ${REQUIRED_PASSWORD_LENGTH} characters`
+        }
+        return undefined
+      }
+      case 'confirmPassword': {
+        if (!values.confirmPassword) return 'Confirm your password'
+        if (values.confirmPassword !== values.password) return 'Passwords do not match'
+        return undefined
+      }
+      case 'termsAccepted': {
+        return values.termsAccepted ? undefined : 'You must accept the terms to continue'
+      }
+    }
+
+    return undefined
+  }
+
+  const validate = (fields?: Array<keyof TenantRegistrationFormState>) => {
+    const fieldsToValidate = fields ?? ALL_FIELDS
+    const stepErrors: Partial<Record<keyof TenantRegistrationFormState, string>> = {}
+    let hasErrors = false
+
+    for (const field of fieldsToValidate) {
+      const error = fieldError(field)
+      if (error) {
+        stepErrors[field] = error
+        hasErrors = true
+      }
+    }
+
+    setErrors((prev) => {
+      const next = { ...prev }
+      for (const field of fieldsToValidate) {
+        const error = stepErrors[field]
+        if (error) {
+          next[field] = error
+        } else {
+          delete next[field]
+        }
+      }
+      return next
+    })
+
+    return !hasErrors
+  }
+
+  const reset = () => {
+    setValues({
+      tenantName: '',
+      tenantSlug: '',
+      accountName: '',
+      email: '',
+      password: '',
+      confirmPassword: '',
+      termsAccepted: false,
+    })
+    setErrors({})
+    setSlugManuallyEdited(false)
+  }
+
+  return {
+    values,
+    errors,
+    updateValue,
+    validate,
+    getFieldError: fieldError,
+    reset,
+  }
+}
diff --git a/be/apps/dashboard/src/modules/auth/types.ts b/be/apps/dashboard/src/modules/auth/types.ts
index ebfb1c1d..21f35753 100644
--- a/be/apps/dashboard/src/modules/auth/types.ts
+++ b/be/apps/dashboard/src/modules/auth/types.ts
@@ -1,4 +1,4 @@
-export type BetterAuthUserRole = 'user' | 'admin' | 'superadmin'
+export type BetterAuthUserRole = 'guest' | 'user' | 'admin' | 'superadmin'
 
 export interface BetterAuthUser {
   id: string
@@ -22,4 +22,5 @@ export interface BetterAuthSession {
 export interface AuthState {
   user: BetterAuthUser
   session: BetterAuthSession
+  source?: 'global' | 'tenant'
 }
diff --git a/be/apps/dashboard/src/modules/onboarding/api.ts b/be/apps/dashboard/src/modules/onboarding/api.ts
index bebe9957..c8b8ffbd 100644
--- a/be/apps/dashboard/src/modules/onboarding/api.ts
+++ b/be/apps/dashboard/src/modules/onboarding/api.ts
@@ -15,7 +15,6 @@ export type OnboardingInitPayload = {
   tenant: {
     name: string
     slug: string
-    domain?: string
   }
   settings?: Array<{
     key: OnboardingSettingKey
diff --git a/be/apps/dashboard/src/modules/onboarding/components/OnboardingWizard.tsx b/be/apps/dashboard/src/modules/onboarding/components/OnboardingWizard.tsx
index c48a92d6..6a4beeba 100644
--- a/be/apps/dashboard/src/modules/onboarding/components/OnboardingWizard.tsx
+++ b/be/apps/dashboard/src/modules/onboarding/components/OnboardingWizard.tsx
@@ -36,8 +36,6 @@ export const OnboardingWizard: FC = () => {
     errors,
     updateTenantName,
     updateTenantSlug,
-
-    updateTenantDomain,
     updateAdminField,
     toggleSetting,
     updateSettingValue,
@@ -122,13 +120,7 @@ export const OnboardingWizard: FC = () => {
   const stepContent: Record<typeof currentStep.id, ReactNode> = {
     welcome: <WelcomeStep />,
     tenant: (
-      <TenantStep
-        tenant={tenant}
-        errors={errors}
-        onNameChange={updateTenantName}
-        onSlugChange={updateTenantSlug}
-        onDomainChange={updateTenantDomain}
-      />
+      <TenantStep tenant={tenant} errors={errors} onNameChange={updateTenantName} onSlugChange={updateTenantSlug} />
     ),
     admin: <AdminStep admin={admin} errors={errors} onChange={updateAdminField} />,
     settings: (
diff --git a/be/apps/dashboard/src/modules/onboarding/components/steps/ReviewStep.tsx b/be/apps/dashboard/src/modules/onboarding/components/steps/ReviewStep.tsx
index b5a5b4e3..e8e4e1f3 100644
--- a/be/apps/dashboard/src/modules/onboarding/components/steps/ReviewStep.tsx
+++ b/be/apps/dashboard/src/modules/onboarding/components/steps/ReviewStep.tsx
@@ -39,10 +39,6 @@ export const ReviewStep: FC<ReviewStepProps> = ({
           <dt className="text-text font-semibold">Slug</dt>
           <dd className="mt-1">{tenant.slug || '—'}</dd>
         </div>
-        <div>
-          <dt className="text-text font-semibold">Domain</dt>
-          <dd className="mt-1">{tenant.domain || 'Not configured'}</dd>
-        </div>
       </dl>
     </div>
 
diff --git a/be/apps/dashboard/src/modules/onboarding/components/steps/TenantStep.tsx b/be/apps/dashboard/src/modules/onboarding/components/steps/TenantStep.tsx
index 80179dcc..f38efb73 100644
--- a/be/apps/dashboard/src/modules/onboarding/components/steps/TenantStep.tsx
+++ b/be/apps/dashboard/src/modules/onboarding/components/steps/TenantStep.tsx
@@ -8,10 +8,9 @@ type TenantStepProps = {
   errors: OnboardingErrors
   onNameChange: (value: string) => void
   onSlugChange: (value: string) => void
-  onDomainChange: (value: string) => void
 }
 
-export const TenantStep: FC<TenantStepProps> = ({ tenant, errors, onNameChange, onSlugChange, onDomainChange }) => (
+export const TenantStep: FC<TenantStepProps> = ({ tenant, errors, onNameChange, onSlugChange }) => (
   <form className="space-y-6" onSubmit={(event) => event.preventDefault()}>
     <div className="grid gap-5 md:grid-cols-2">
       <div className="space-y-2">
@@ -42,21 +41,5 @@ export const TenantStep: FC<TenantStepProps> = ({ tenant, errors, onNameChange,
         <FormError>{errors['tenant.slug']}</FormError>
       </div>
     </div>
-
-    <div className="space-y-2">
-      <Label htmlFor="tenant-domain">Custom domain (optional)</Label>
-      <Input
-        id="tenant-domain"
-        value={tenant.domain}
-        onInput={(event) => onDomainChange(event.currentTarget.value)}
-        placeholder="gallery.afilmory.art"
-        error={!!errors['tenant.domain']}
-        autoComplete="off"
-      />
-      <FormError>{errors['tenant.domain']}</FormError>
-      <p className="text-text-tertiary text-xs">
-        Domains enable automatic routing for tenant-specific dashboards. Configure DNS separately after initialization.
-      </p>
-    </div>
   </form>
 )
diff --git a/be/apps/dashboard/src/modules/onboarding/constants.ts b/be/apps/dashboard/src/modules/onboarding/constants.ts
index 9759f552..64512c88 100644
--- a/be/apps/dashboard/src/modules/onboarding/constants.ts
+++ b/be/apps/dashboard/src/modules/onboarding/constants.ts
@@ -139,7 +139,7 @@ export const ONBOARDING_STEPS: OnboardingStep[] = [
   {
     id: 'tenant',
     title: 'Tenant Profile',
-    description: 'Name your workspace and optional domain.',
+    description: 'Name your workspace and choose a slug.',
   },
   {
     id: 'admin',
diff --git a/be/apps/dashboard/src/modules/onboarding/hooks/useOnboardingWizard.ts b/be/apps/dashboard/src/modules/onboarding/hooks/useOnboardingWizard.ts
index 77d6ac38..359a3028 100644
--- a/be/apps/dashboard/src/modules/onboarding/hooks/useOnboardingWizard.ts
+++ b/be/apps/dashboard/src/modules/onboarding/hooks/useOnboardingWizard.ts
@@ -17,7 +17,6 @@ export function useOnboardingWizard() {
   const [tenant, setTenant] = useState<TenantFormState>({
     name: '',
     slug: '',
-    domain: '',
   })
   const [slugLocked, setSlugLocked] = useState(false)
   const [admin, setAdmin] = useState<AdminFormState>({
@@ -95,14 +94,6 @@ export function useOnboardingWizard() {
       setFieldError('tenant.slug', null)
     }
 
-    const domain = tenant.domain.trim()
-    if (domain && !/^[a-z0-9.-]+$/.test(domain)) {
-      setFieldError('tenant.domain', 'Use lowercase letters, numbers, dot, or hyphen')
-      valid = false
-    } else {
-      setFieldError('tenant.domain', null)
-    }
-
     return valid
   }
 
@@ -190,12 +181,10 @@ export function useOnboardingWizard() {
   }
 
   const submitInitialization = () => {
-    const trimmedDomain = tenant.domain.trim()
     const payload: OnboardingInitPayload = {
       tenant: {
         name: tenant.name.trim(),
         slug: tenant.slug.trim(),
-        ...(trimmedDomain ? { domain: trimmedDomain } : {}),
       },
       admin: {
         name: admin.name.trim(),
@@ -258,11 +247,6 @@ export function useOnboardingWizard() {
     setFieldError('tenant.slug', null)
   }
 
-  const updateTenantDomain = (value: string) => {
-    setTenant((prev) => ({ ...prev, domain: value }))
-    setFieldError('tenant.domain', null)
-  }
-
   const updateAdminField = (field: keyof AdminFormState, value: string) => {
     setAdmin((prev) => ({ ...prev, [field]: value }))
     setFieldError(`admin.${field}`, null)
@@ -316,8 +300,6 @@ export function useOnboardingWizard() {
     errors,
     updateTenantName,
     updateTenantSlug,
-
-    updateTenantDomain,
     updateAdminField,
     toggleSetting,
     updateSettingValue,
diff --git a/be/apps/dashboard/src/modules/onboarding/types.ts b/be/apps/dashboard/src/modules/onboarding/types.ts
index c3984a88..bd18cd10 100644
--- a/be/apps/dashboard/src/modules/onboarding/types.ts
+++ b/be/apps/dashboard/src/modules/onboarding/types.ts
@@ -3,7 +3,6 @@ import type { OnboardingSettingKey } from './constants'
 export type TenantFormState = {
   name: string
   slug: string
-  domain: string
 }
 
 export type AdminFormState = {
diff --git a/be/apps/dashboard/src/modules/photos/components/library/PhotoUploadConfirmModal.tsx b/be/apps/dashboard/src/modules/photos/components/library/PhotoUploadConfirmModal.tsx
index 433923df..de6958d6 100644
--- a/be/apps/dashboard/src/modules/photos/components/library/PhotoUploadConfirmModal.tsx
+++ b/be/apps/dashboard/src/modules/photos/components/library/PhotoUploadConfirmModal.tsx
@@ -4,7 +4,7 @@ import { clsxm, Spring } from '@afilmory/utils'
 import { m } from 'motion/react'
 import { useMemo } from 'react'
 
-const formatBytes = (bytes: number) => {
+function formatBytes(bytes: number) {
   if (!Number.isFinite(bytes) || bytes <= 0) return '未知大小'
   const units = ['B', 'KB', 'MB', 'GB', 'TB']
   const exponent = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), units.length - 1)
@@ -29,13 +29,13 @@ const IMAGE_EXTENSIONS = new Set([
   'dng',
 ])
 
-const getFileExtension = (name: string) => {
+function getFileExtension(name: string) {
   const normalized = name.toLowerCase()
   const lastDotIndex = normalized.lastIndexOf('.')
   return lastDotIndex === -1 ? '' : normalized.slice(lastDotIndex + 1)
 }
 
-const getBaseName = (name: string) => {
+function getBaseName(name: string) {
   const normalized = name.toLowerCase()
   const lastDotIndex = normalized.lastIndexOf('.')
   return lastDotIndex === -1 ? normalized : normalized.slice(0, lastDotIndex)
diff --git a/be/apps/dashboard/src/modules/super-admin/components/SuperAdminSettingsForm.tsx b/be/apps/dashboard/src/modules/super-admin/components/SuperAdminSettingsForm.tsx
index a264a259..d1b0e777 100644
--- a/be/apps/dashboard/src/modules/super-admin/components/SuperAdminSettingsForm.tsx
+++ b/be/apps/dashboard/src/modules/super-admin/components/SuperAdminSettingsForm.tsx
@@ -1,5 +1,5 @@
 import { Button } from '@afilmory/ui'
-import { Spring } from '@afilmory/utils'
+import { DEFAULT_BASE_DOMAIN, Spring } from '@afilmory/utils'
 import { m } from 'motion/react'
 import { startTransition, useCallback, useEffect, useMemo, useRef, useState } from 'react'
 
@@ -19,11 +19,24 @@ type FormState = Record<SuperAdminSettingField, SchemaFormValue>
 
 const BOOLEAN_FIELDS = new Set<SuperAdminSettingField>(['allowRegistration', 'localProviderEnabled'])
 
+function asString(value: SchemaFormValue): string {
+  if (value === undefined || value === null) {
+    return ''
+  }
+
+  if (typeof value === 'string') {
+    return value
+  }
+
+  return String(value)
+}
+
 function toFormState(settings: SuperAdminSettings): FormState {
   return {
     allowRegistration: settings.allowRegistration,
     localProviderEnabled: settings.localProviderEnabled,
     maxRegistrableUsers: settings.maxRegistrableUsers === null ? '' : String(settings.maxRegistrableUsers),
+    baseDomain: (settings.baseDomain ?? DEFAULT_BASE_DOMAIN) || DEFAULT_BASE_DOMAIN,
   }
 }
 
@@ -39,7 +52,8 @@ function areFormStatesEqual(left: FormState | null, right: FormState | null): bo
   return (
     left.allowRegistration === right.allowRegistration &&
     left.localProviderEnabled === right.localProviderEnabled &&
-    left.maxRegistrableUsers === right.maxRegistrableUsers
+    left.maxRegistrableUsers === right.maxRegistrableUsers &&
+    asString(left.baseDomain).trim() === asString(right.baseDomain).trim()
   )
 }
 
@@ -60,6 +74,7 @@ type PossiblySnakeCaseSettings = Partial<
     allow_registration: boolean
     local_provider_enabled: boolean
     max_registrable_users: number | null
+    base_domain: string
   }
 >
 
@@ -86,6 +101,7 @@ function normalizeServerSettings(input: PossiblySnakeCaseSettings | null): Super
       allowRegistration: input.allowRegistration ?? false,
       localProviderEnabled: input.localProviderEnabled ?? false,
       maxRegistrableUsers: coerceMaxUsers(input.maxRegistrableUsers),
+      baseDomain: ((input.baseDomain ?? DEFAULT_BASE_DOMAIN) || DEFAULT_BASE_DOMAIN).toString(),
     }
   }
 
@@ -94,6 +110,7 @@ function normalizeServerSettings(input: PossiblySnakeCaseSettings | null): Super
       allowRegistration: input.allow_registration ?? false,
       localProviderEnabled: input.local_provider_enabled ?? false,
       maxRegistrableUsers: coerceMaxUsers(input.max_registrable_users),
+      baseDomain: ((input.base_domain ?? DEFAULT_BASE_DOMAIN) || DEFAULT_BASE_DOMAIN).toString(),
     }
   }
 
@@ -212,6 +229,11 @@ export function SuperAdminSettingsForm() {
       }
     }
 
+    if (asString(formState.baseDomain).trim() !== asString(initialState.baseDomain).trim()) {
+      const value = asString(formState.baseDomain).trim()
+      payload.baseDomain = (value.length > 0 ? value : DEFAULT_BASE_DOMAIN).toLowerCase()
+    }
+
     return Object.keys(payload).length > 0 ? payload : null
   }
 
diff --git a/be/apps/dashboard/src/modules/super-admin/types.ts b/be/apps/dashboard/src/modules/super-admin/types.ts
index 22da054a..2e9e1df5 100644
--- a/be/apps/dashboard/src/modules/super-admin/types.ts
+++ b/be/apps/dashboard/src/modules/super-admin/types.ts
@@ -4,6 +4,7 @@ export interface SuperAdminSettings {
   allowRegistration: boolean
   localProviderEnabled: boolean
   maxRegistrableUsers: number | null
+  baseDomain: string
 }
 
 export type SuperAdminSettingField = keyof SuperAdminSettings
@@ -32,4 +33,5 @@ export type UpdateSuperAdminSettingsPayload = Partial<{
   allowRegistration: boolean
   localProviderEnabled: boolean
   maxRegistrableUsers: number | null
+  baseDomain: string
 }>
diff --git a/be/apps/dashboard/src/pages/(onboarding)/register.tsx b/be/apps/dashboard/src/pages/(onboarding)/register.tsx
new file mode 100644
index 00000000..ab6434bc
--- /dev/null
+++ b/be/apps/dashboard/src/pages/(onboarding)/register.tsx
@@ -0,0 +1,5 @@
+import { RegistrationWizard } from '~/modules/auth/components/RegistrationWizard'
+
+export function Component() {
+  return <RegistrationWizard />
+}
diff --git a/be/apps/dashboard/vite.config.ts b/be/apps/dashboard/vite.config.ts
index ef54597f..5510e2a1 100644
--- a/be/apps/dashboard/vite.config.ts
+++ b/be/apps/dashboard/vite.config.ts
@@ -49,7 +49,24 @@ export default defineConfig({
       '/api': {
         target: API_TARGET,
         changeOrigin: true,
+        xfwd: true,
         // keep path as-is so /api -> backend /api
+        configure: (proxy) => {
+          proxy.on('proxyReq', (proxyReq, req) => {
+            const originalHost = req.headers.host
+            if (originalHost) {
+              const normalizedHost = Array.isArray(originalHost) ? originalHost[0] : originalHost
+              // Preserve SPA host for tenant resolution regardless of changeOrigin behaviour
+              proxyReq.setHeader('host', normalizedHost)
+              proxyReq.setHeader('x-forwarded-host', normalizedHost)
+            }
+
+            const originHeader = req.headers.origin
+            if (originHeader) {
+              proxyReq.setHeader('origin', Array.isArray(originHeader) ? originHeader[0] : originHeader)
+            }
+          })
+        },
       },
     },
   },
diff --git a/be/eslint.config.ts b/be/eslint.config.ts
index 1c55e1aa..57248bd1 100644
--- a/be/eslint.config.ts
+++ b/be/eslint.config.ts
@@ -12,6 +12,7 @@ export default defineConfig(
       },
     },
     rules: {
+      'unicorn/no-abusive-eslint-disable': 0,
       'unicorn/no-useless-undefined': 0,
       '@typescript-eslint/no-unsafe-function-type': 0,
     },
diff --git a/be/packages/db/migrations/0004_sleepy_avengers.sql b/be/packages/db/migrations/0004_sleepy_avengers.sql
new file mode 100644
index 00000000..8787c637
--- /dev/null
+++ b/be/packages/db/migrations/0004_sleepy_avengers.sql
@@ -0,0 +1,56 @@
+CREATE TABLE "tenant_auth_account" (
+	"id" text PRIMARY KEY NOT NULL,
+	"tenant_id" text NOT NULL,
+	"account_id" text NOT NULL,
+	"provider_id" text NOT NULL,
+	"user_id" text NOT NULL,
+	"access_token" text,
+	"refresh_token" text,
+	"id_token" text,
+	"access_token_expires_at" timestamp,
+	"refresh_token_expires_at" timestamp,
+	"scope" text,
+	"password" text,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "tenant_auth_session" (
+	"id" text PRIMARY KEY NOT NULL,
+	"tenant_id" text NOT NULL,
+	"expires_at" timestamp NOT NULL,
+	"token" text NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL,
+	"ip_address" text,
+	"user_agent" text,
+	"user_id" text NOT NULL,
+	CONSTRAINT "tenant_auth_session_token_unique" UNIQUE("token")
+);
+--> statement-breakpoint
+CREATE TABLE "tenant_auth_user" (
+	"id" text PRIMARY KEY NOT NULL,
+	"tenant_id" text NOT NULL,
+	"name" text NOT NULL,
+	"email" text NOT NULL,
+	"email_verified" boolean DEFAULT false NOT NULL,
+	"image" text,
+	"role" text DEFAULT 'guest' NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL,
+	"two_factor_enabled" boolean DEFAULT false NOT NULL,
+	"username" text,
+	"display_username" text,
+	"banned" boolean DEFAULT false NOT NULL,
+	"ban_reason" text,
+	"ban_expires_at" timestamp,
+	CONSTRAINT "uq_tenant_auth_user_tenant_email" UNIQUE("tenant_id","email")
+);
+--> statement-breakpoint
+ALTER TABLE "tenant_auth_account" ADD CONSTRAINT "tenant_auth_account_tenant_id_tenant_id_fk" FOREIGN KEY ("tenant_id") REFERENCES "public"."tenant"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "tenant_auth_account" ADD CONSTRAINT "tenant_auth_account_user_id_tenant_auth_user_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."tenant_auth_user"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "tenant_auth_session" ADD CONSTRAINT "tenant_auth_session_tenant_id_tenant_id_fk" FOREIGN KEY ("tenant_id") REFERENCES "public"."tenant"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "tenant_auth_session" ADD CONSTRAINT "tenant_auth_session_user_id_tenant_auth_user_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."tenant_auth_user"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "tenant_auth_user" ADD CONSTRAINT "tenant_auth_user_tenant_id_tenant_id_fk" FOREIGN KEY ("tenant_id") REFERENCES "public"."tenant"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "idx_reactions_tenant_ref_key" ON "reactions" USING btree ("tenant_id","ref_key");--> statement-breakpoint
+ALTER TABLE "reactions" ADD CONSTRAINT "uq_reactions_tenant_ref_key" UNIQUE("tenant_id","ref_key");
\ No newline at end of file
diff --git a/be/packages/db/migrations/0005_remove_primary_tenant.sql b/be/packages/db/migrations/0005_remove_primary_tenant.sql
new file mode 100644
index 00000000..dfb27a80
--- /dev/null
+++ b/be/packages/db/migrations/0005_remove_primary_tenant.sql
@@ -0,0 +1 @@
+ALTER TABLE "tenant" DROP COLUMN IF EXISTS "is_primary";
\ No newline at end of file
diff --git a/be/packages/db/migrations/0006_remove_tenant_domains.sql b/be/packages/db/migrations/0006_remove_tenant_domains.sql
new file mode 100644
index 00000000..1577e3aa
--- /dev/null
+++ b/be/packages/db/migrations/0006_remove_tenant_domains.sql
@@ -0,0 +1,2 @@
+ALTER TABLE "tenant" DROP COLUMN IF EXISTS "primary_domain";
+DROP TABLE IF EXISTS "tenant_domain";
diff --git a/be/packages/db/migrations/meta/0004_snapshot.json b/be/packages/db/migrations/meta/0004_snapshot.json
new file mode 100644
index 00000000..4892579d
--- /dev/null
+++ b/be/packages/db/migrations/meta/0004_snapshot.json
@@ -0,0 +1,1199 @@
+{
+  "id": "c4c2ca27-8772-412f-b10f-5fd53410316d",
+  "prevId": "73c602e7-efc2-46a3-ab83-cecf071c2035",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.auth_account": {
+      "name": "auth_account",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "account_id": {
+          "name": "account_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "provider_id": {
+          "name": "provider_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "access_token": {
+          "name": "access_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token": {
+          "name": "refresh_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token_expires_at": {
+          "name": "refresh_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "scope": {
+          "name": "scope",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "password": {
+          "name": "password",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "auth_account_user_id_auth_user_id_fk": {
+          "name": "auth_account_user_id_auth_user_id_fk",
+          "tableFrom": "auth_account",
+          "tableTo": "auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_session": {
+      "name": "auth_session",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token": {
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+        },
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+          "notNull": true,
+          "default": "now()"
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+          "type": "timestamp",
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+          "notNull": true,
+          "default": "now()"
+        },
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+          "name": "ip_address",
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+          "notNull": false
+        },
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+          "name": "user_agent",
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+          "onUpdate": "no action"
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+          "tableTo": "auth_user",
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+          "columns": ["token"]
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+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+          "notNull": true
+        },
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+          "type": "boolean",
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+          "notNull": true,
+          "default": false
+        },
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+        },
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+          "type": "user_role",
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+          "notNull": true,
+          "default": "'user'"
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+        },
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+          "notNull": true,
+          "default": "now()"
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+          "notNull": true,
+          "default": "now()"
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+          "type": "boolean",
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+          "notNull": true,
+          "default": false
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+        },
+        "display_username": {
+          "name": "display_username",
+          "type": "text",
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+        },
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+          "type": "boolean",
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+          "notNull": true,
+          "default": false
+        },
+        "ban_reason": {
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+        "ban_expires_at": {
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+          "type": "timestamp",
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+        }
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+          "onUpdate": "no action"
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+          "columns": ["email"]
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+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.photo_asset": {
+      "name": "photo_asset",
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+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
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+        },
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+        },
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+          "type": "text",
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+        },
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+          "type": "text",
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+          "type": "bigint",
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+        },
+        "etag": {
+          "name": "etag",
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+        },
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+          "name": "last_modified",
+          "type": "timestamp",
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+        },
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+        },
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+          "default": "'v7'"
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+        },
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+          "type": "photo_sync_status",
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+          "notNull": true,
+          "default": "'pending'"
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+          "default": "'null'::jsonb"
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+          "default": "now()"
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+          "default": "now()"
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+          "columns": ["tenant_id", "photo_id"]
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+          "type": "text",
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+          "default": "now()"
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+          "method": "btree",
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+          "tableTo": "tenant",
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+      },
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+        },
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+        },
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+        },
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+          "notNull": true,
+          "default": "now()"
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+          "columnsTo": ["id"],
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+          "columns": ["tenant_id", "key"]
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+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+        },
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+          "default": false
+        },
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+        },
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+          "default": "now()"
+        },
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+          "default": "now()"
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+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+      "name": "tenant_auth_account",
+      "schema": "",
+      "columns": {
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+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
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+          "notNull": true
+        },
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+          "notNull": true
+        },
+        "provider_id": {
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+        },
+        "user_id": {
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+          "notNull": true
+        },
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+          "type": "text",
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+          "notNull": false
+        },
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+          "type": "text",
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+        },
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+          "type": "text",
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+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp",
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+          "notNull": false
+        },
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+          "name": "refresh_token_expires_at",
+          "type": "timestamp",
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+          "notNull": false
+        },
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+          "type": "text",
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+          "notNull": false
+        },
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+          "name": "password",
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+          "notNull": false
+        },
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+          "notNull": true,
+          "default": "now()"
+        },
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+          "default": "now()"
+        }
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+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
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+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
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+          "tableFrom": "tenant_auth_account",
+          "tableTo": "tenant_auth_user",
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+      "name": "tenant_auth_session",
+      "schema": "",
+      "columns": {
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+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
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+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp",
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+          "notNull": true
+        },
+        "token": {
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+          "notNull": true
+        },
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+          "type": "timestamp",
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+          "notNull": true,
+          "default": "now()"
+        },
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+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
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+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
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+          "tableFrom": "tenant_auth_session",
+          "tableTo": "tenant_auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
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+          "onUpdate": "no action"
+        }
+      },
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+      "uniqueConstraints": {
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+          "name": "tenant_auth_session_token_unique",
+          "nullsNotDistinct": false,
+          "columns": ["token"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_auth_user": {
+      "name": "tenant_auth_user",
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+      "columns": {
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+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "image": {
+          "name": "image",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "role": {
+          "name": "role",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'guest'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "two_factor_enabled": {
+          "name": "two_factor_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "username": {
+          "name": "username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "display_username": {
+          "name": "display_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "banned": {
+          "name": "banned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "ban_reason": {
+          "name": "ban_reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "ban_expires_at": {
+          "name": "ban_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_auth_user_tenant_id_tenant_id_fk": {
+          "name": "tenant_auth_user_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_auth_user",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_auth_user_tenant_email": {
+          "name": "uq_tenant_auth_user_tenant_email",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "email"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_domain": {
+      "name": "tenant_domain",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "domain": {
+          "name": "domain",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_primary": {
+          "name": "is_primary",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_domain_tenant_id_tenant_id_fk": {
+          "name": "tenant_domain_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_domain",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_domain_domain": {
+          "name": "uq_tenant_domain_domain",
+          "nullsNotDistinct": false,
+          "columns": ["domain"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant": {
+      "name": "tenant",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "slug": {
+          "name": "slug",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "status": {
+          "name": "status",
+          "type": "tenant_status",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'inactive'"
+        },
+        "primary_domain": {
+          "name": "primary_domain",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "is_primary": {
+          "name": "is_primary",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_slug": {
+          "name": "uq_tenant_slug",
+          "nullsNotDistinct": false,
+          "columns": ["slug"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.photo_sync_status": {
+      "name": "photo_sync_status",
+      "schema": "public",
+      "values": ["pending", "synced", "conflict"]
+    },
+    "public.tenant_status": {
+      "name": "tenant_status",
+      "schema": "public",
+      "values": ["active", "inactive", "suspended"]
+    },
+    "public.user_role": {
+      "name": "user_role",
+      "schema": "public",
+      "values": ["user", "admin", "superadmin"]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
diff --git a/be/packages/db/migrations/meta/0005_snapshot.json b/be/packages/db/migrations/meta/0005_snapshot.json
new file mode 100644
index 00000000..cbcf2773
--- /dev/null
+++ b/be/packages/db/migrations/meta/0005_snapshot.json
@@ -0,0 +1,1192 @@
+{
+  "id": "5d5a2288-9a09-4fe5-843d-6e9bf137c551",
+  "prevId": "c4c2ca27-8772-412f-b10f-5fd53410316d",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.auth_account": {
+      "name": "auth_account",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "account_id": {
+          "name": "account_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "provider_id": {
+          "name": "provider_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "access_token": {
+          "name": "access_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token": {
+          "name": "refresh_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token_expires_at": {
+          "name": "refresh_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "scope": {
+          "name": "scope",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "password": {
+          "name": "password",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "auth_account_user_id_auth_user_id_fk": {
+          "name": "auth_account_user_id_auth_user_id_fk",
+          "tableFrom": "auth_account",
+          "tableTo": "auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_session": {
+      "name": "auth_session",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token": {
+          "name": "token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "auth_session_tenant_id_tenant_id_fk": {
+          "name": "auth_session_tenant_id_tenant_id_fk",
+          "tableFrom": "auth_session",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        },
+        "auth_session_user_id_auth_user_id_fk": {
+          "name": "auth_session_user_id_auth_user_id_fk",
+          "tableFrom": "auth_session",
+          "tableTo": "auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "auth_session_token_unique": {
+          "name": "auth_session_token_unique",
+          "nullsNotDistinct": false,
+          "columns": ["token"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_user": {
+      "name": "auth_user",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "image": {
+          "name": "image",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "role": {
+          "name": "role",
+          "type": "user_role",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'user'"
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "two_factor_enabled": {
+          "name": "two_factor_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "username": {
+          "name": "username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "display_username": {
+          "name": "display_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "banned": {
+          "name": "banned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "ban_reason": {
+          "name": "ban_reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "ban_expires_at": {
+          "name": "ban_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "auth_user_tenant_id_tenant_id_fk": {
+          "name": "auth_user_tenant_id_tenant_id_fk",
+          "tableFrom": "auth_user",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "auth_user_email_unique": {
+          "name": "auth_user_email_unique",
+          "nullsNotDistinct": false,
+          "columns": ["email"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.photo_asset": {
+      "name": "photo_asset",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "photo_id": {
+          "name": "photo_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "storage_key": {
+          "name": "storage_key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "storage_provider": {
+          "name": "storage_provider",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "size": {
+          "name": "size",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "etag": {
+          "name": "etag",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "last_modified": {
+          "name": "last_modified",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "metadata_hash": {
+          "name": "metadata_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "manifest_version": {
+          "name": "manifest_version",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'v7'"
+        },
+        "manifest": {
+          "name": "manifest",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "sync_status": {
+          "name": "sync_status",
+          "type": "photo_sync_status",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'pending'"
+        },
+        "conflict_reason": {
+          "name": "conflict_reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "conflict_payload": {
+          "name": "conflict_payload",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'null'::jsonb"
+        },
+        "synced_at": {
+          "name": "synced_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "photo_asset_tenant_id_tenant_id_fk": {
+          "name": "photo_asset_tenant_id_tenant_id_fk",
+          "tableFrom": "photo_asset",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_photo_asset_tenant_storage_key": {
+          "name": "uq_photo_asset_tenant_storage_key",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "storage_key"]
+        },
+        "uq_photo_asset_tenant_photo_id": {
+          "name": "uq_photo_asset_tenant_photo_id",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "photo_id"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.reactions": {
+      "name": "reactions",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "ref_key": {
+          "name": "ref_key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "reaction": {
+          "name": "reaction",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {
+        "idx_reactions_tenant_ref_key": {
+          "name": "idx_reactions_tenant_ref_key",
+          "columns": [
+            {
+              "expression": "tenant_id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "ref_key",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "reactions_tenant_id_tenant_id_fk": {
+          "name": "reactions_tenant_id_tenant_id_fk",
+          "tableFrom": "reactions",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_reactions_tenant_ref_key": {
+          "name": "uq_reactions_tenant_ref_key",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "ref_key"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.settings": {
+      "name": "settings",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "key": {
+          "name": "key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "value": {
+          "name": "value",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_sensitive": {
+          "name": "is_sensitive",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "settings_tenant_id_tenant_id_fk": {
+          "name": "settings_tenant_id_tenant_id_fk",
+          "tableFrom": "settings",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_settings_tenant_key": {
+          "name": "uq_settings_tenant_key",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "key"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.system_setting": {
+      "name": "system_setting",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "key": {
+          "name": "key",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "value": {
+          "name": "value",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'null'::jsonb"
+        },
+        "is_sensitive": {
+          "name": "is_sensitive",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_system_setting_key": {
+          "name": "uq_system_setting_key",
+          "nullsNotDistinct": false,
+          "columns": ["key"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_auth_account": {
+      "name": "tenant_auth_account",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "account_id": {
+          "name": "account_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "provider_id": {
+          "name": "provider_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "access_token": {
+          "name": "access_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token": {
+          "name": "refresh_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token_expires_at": {
+          "name": "refresh_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "scope": {
+          "name": "scope",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "password": {
+          "name": "password",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_auth_account_tenant_id_tenant_id_fk": {
+          "name": "tenant_auth_account_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_auth_account",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "tenant_auth_account_user_id_tenant_auth_user_id_fk": {
+          "name": "tenant_auth_account_user_id_tenant_auth_user_id_fk",
+          "tableFrom": "tenant_auth_account",
+          "tableTo": "tenant_auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_auth_session": {
+      "name": "tenant_auth_session",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token": {
+          "name": "token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_auth_session_tenant_id_tenant_id_fk": {
+          "name": "tenant_auth_session_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_auth_session",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        },
+        "tenant_auth_session_user_id_tenant_auth_user_id_fk": {
+          "name": "tenant_auth_session_user_id_tenant_auth_user_id_fk",
+          "tableFrom": "tenant_auth_session",
+          "tableTo": "tenant_auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "tenant_auth_session_token_unique": {
+          "name": "tenant_auth_session_token_unique",
+          "nullsNotDistinct": false,
+          "columns": ["token"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_auth_user": {
+      "name": "tenant_auth_user",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "image": {
+          "name": "image",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "role": {
+          "name": "role",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'guest'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "two_factor_enabled": {
+          "name": "two_factor_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "username": {
+          "name": "username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "display_username": {
+          "name": "display_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "banned": {
+          "name": "banned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "ban_reason": {
+          "name": "ban_reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "ban_expires_at": {
+          "name": "ban_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_auth_user_tenant_id_tenant_id_fk": {
+          "name": "tenant_auth_user_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_auth_user",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_auth_user_tenant_email": {
+          "name": "uq_tenant_auth_user_tenant_email",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "email"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_domain": {
+      "name": "tenant_domain",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "domain": {
+          "name": "domain",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_primary": {
+          "name": "is_primary",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_domain_tenant_id_tenant_id_fk": {
+          "name": "tenant_domain_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_domain",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_domain_domain": {
+          "name": "uq_tenant_domain_domain",
+          "nullsNotDistinct": false,
+          "columns": ["domain"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant": {
+      "name": "tenant",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "slug": {
+          "name": "slug",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "status": {
+          "name": "status",
+          "type": "tenant_status",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'inactive'"
+        },
+        "primary_domain": {
+          "name": "primary_domain",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_slug": {
+          "name": "uq_tenant_slug",
+          "nullsNotDistinct": false,
+          "columns": ["slug"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.photo_sync_status": {
+      "name": "photo_sync_status",
+      "schema": "public",
+      "values": ["pending", "synced", "conflict"]
+    },
+    "public.tenant_status": {
+      "name": "tenant_status",
+      "schema": "public",
+      "values": ["active", "inactive", "suspended"]
+    },
+    "public.user_role": {
+      "name": "user_role",
+      "schema": "public",
+      "values": ["user", "admin", "superadmin"]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
diff --git a/be/packages/db/migrations/meta/0006_snapshot.json b/be/packages/db/migrations/meta/0006_snapshot.json
new file mode 100644
index 00000000..adc7292a
--- /dev/null
+++ b/be/packages/db/migrations/meta/0006_snapshot.json
@@ -0,0 +1,1118 @@
+{
+  "id": "4c9bc1e3-3d3f-422f-af8f-0fb4583a2f90",
+  "prevId": "5d5a2288-9a09-4fe5-843d-6e9bf137c551",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.auth_account": {
+      "name": "auth_account",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "account_id": {
+          "name": "account_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "provider_id": {
+          "name": "provider_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "access_token": {
+          "name": "access_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token": {
+          "name": "refresh_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "access_token_expires_at": {
+          "name": "access_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "refresh_token_expires_at": {
+          "name": "refresh_token_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "scope": {
+          "name": "scope",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "password": {
+          "name": "password",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "auth_account_user_id_auth_user_id_fk": {
+          "name": "auth_account_user_id_auth_user_id_fk",
+          "tableFrom": "auth_account",
+          "tableTo": "auth_user",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.auth_session": {
+      "name": "auth_session",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "token": {
+          "name": "token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+          "type": "boolean",
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+          "notNull": true,
+          "default": false
+        },
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+        },
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+          "notNull": true,
+          "default": "'user'"
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+          "default": "now()"
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+          "notNull": true,
+          "default": "now()"
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+          "notNull": true,
+          "default": false
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+        },
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+          "notNull": true,
+          "default": false
+        },
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+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.photo_asset": {
+      "name": "photo_asset",
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+        },
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+          "type": "timestamp",
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+        },
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+          "default": "'v7'"
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+        },
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+          "notNull": true,
+          "default": "'pending'"
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+          "default": "'null'::jsonb"
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+          "default": "now()"
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+          "columns": ["tenant_id", "photo_id"]
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+              "nulls": "last"
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+    },
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+          "default": "now()"
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+          "columns": ["tenant_id", "key"]
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+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+        },
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+        },
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+          "default": "now()"
+        },
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+      "policies": {},
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+      "isRLSEnabled": false
+    },
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+          "name": "id",
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+          "primaryKey": true,
+          "notNull": true
+        },
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+          "notNull": true
+        },
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+          "notNull": true
+        },
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+        },
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+        },
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+          "notNull": false
+        },
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+        },
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+        },
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+          "name": "access_token_expires_at",
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+        },
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+        },
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+        },
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+          "notNull": false
+        },
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+        },
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+          "default": "now()"
+        }
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+          "onUpdate": "no action"
+        },
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+          "tableTo": "tenant_auth_user",
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+      },
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+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
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+      "name": "tenant_auth_session",
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+          "name": "id",
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+          "primaryKey": true,
+          "notNull": true
+        },
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+          "notNull": true
+        },
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+          "name": "expires_at",
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+          "notNull": true
+        },
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+        },
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+          "default": "now()"
+        },
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+          "type": "timestamp",
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+          "notNull": true,
+          "default": "now()"
+        },
+        "ip_address": {
+          "name": "ip_address",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_agent": {
+          "name": "user_agent",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
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+          "notNull": true
+        }
+      },
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+          "columnsTo": ["id"],
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+          "onUpdate": "no action"
+        },
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+          "tableTo": "tenant_auth_user",
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+        }
+      },
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+          "name": "tenant_auth_session_token_unique",
+          "nullsNotDistinct": false,
+          "columns": ["token"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant_auth_user": {
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+      "columns": {
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+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tenant_id": {
+          "name": "tenant_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
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+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "image": {
+          "name": "image",
+          "type": "text",
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+          "notNull": false
+        },
+        "role": {
+          "name": "role",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'guest'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "two_factor_enabled": {
+          "name": "two_factor_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "username": {
+          "name": "username",
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+          "notNull": false
+        },
+        "display_username": {
+          "name": "display_username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "banned": {
+          "name": "banned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "ban_reason": {
+          "name": "ban_reason",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "ban_expires_at": {
+          "name": "ban_expires_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "tenant_auth_user_tenant_id_tenant_id_fk": {
+          "name": "tenant_auth_user_tenant_id_tenant_id_fk",
+          "tableFrom": "tenant_auth_user",
+          "tableTo": "tenant",
+          "columnsFrom": ["tenant_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_auth_user_tenant_email": {
+          "name": "uq_tenant_auth_user_tenant_email",
+          "nullsNotDistinct": false,
+          "columns": ["tenant_id", "email"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tenant": {
+      "name": "tenant",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "slug": {
+          "name": "slug",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "status": {
+          "name": "status",
+          "type": "tenant_status",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'inactive'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "uq_tenant_slug": {
+          "name": "uq_tenant_slug",
+          "nullsNotDistinct": false,
+          "columns": ["slug"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.photo_sync_status": {
+      "name": "photo_sync_status",
+      "schema": "public",
+      "values": ["pending", "synced", "conflict"]
+    },
+    "public.tenant_status": {
+      "name": "tenant_status",
+      "schema": "public",
+      "values": ["active", "inactive", "suspended"]
+    },
+    "public.user_role": {
+      "name": "user_role",
+      "schema": "public",
+      "values": ["user", "admin", "superadmin"]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
diff --git a/be/packages/db/migrations/meta/_journal.json b/be/packages/db/migrations/meta/_journal.json
index 3879106c..cc6506c3 100644
--- a/be/packages/db/migrations/meta/_journal.json
+++ b/be/packages/db/migrations/meta/_journal.json
@@ -29,6 +29,27 @@
       "when": 1761917402844,
       "tag": "0003_lovely_wendell_rand",
       "breakpoints": true
+    },
+    {
+      "idx": 4,
+      "version": "7",
+      "when": 1762176641407,
+      "tag": "0004_sleepy_avengers",
+      "breakpoints": true
+    },
+    {
+      "idx": 5,
+      "version": "7",
+      "when": 1762350000000,
+      "tag": "0005_remove_primary_tenant",
+      "breakpoints": true
+    },
+    {
+      "idx": 6,
+      "version": "7",
+      "when": 1762353600000,
+      "tag": "0006_remove_tenant_domains",
+      "breakpoints": true
     }
   ]
 }
diff --git a/be/packages/db/src/schema.ts b/be/packages/db/src/schema.ts
index 6bac6027..f8ec7fea 100644
--- a/be/packages/db/src/schema.ts
+++ b/be/packages/db/src/schema.ts
@@ -50,29 +50,12 @@ export const tenants = pgTable(
     slug: text('slug').notNull(),
     name: text('name').notNull(),
     status: tenantStatusEnum('status').notNull().default('inactive'),
-    primaryDomain: text('primary_domain'),
-    isPrimary: boolean('is_primary').notNull().default(false),
     createdAt: timestamp('created_at', { mode: 'string' }).defaultNow().notNull(),
     updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
   },
   (t) => [unique('uq_tenant_slug').on(t.slug)],
 )
 
-export const tenantDomains = pgTable(
-  'tenant_domain',
-  {
-    id: snowflakeId,
-    tenantId: text('tenant_id')
-      .notNull()
-      .references(() => tenants.id, { onDelete: 'cascade' }),
-    domain: text('domain').notNull(),
-    isPrimary: boolean('is_primary').notNull().default(false),
-    createdAt: timestamp('created_at', { mode: 'string' }).defaultNow().notNull(),
-    updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
-  },
-  (t) => [unique('uq_tenant_domain_domain').on(t.domain)],
-)
-
 // Custom users table (Better Auth: user)
 export const authUsers = pgTable('auth_user', {
   id: text('id').primaryKey(),
@@ -126,6 +109,67 @@ export const authAccounts = pgTable('auth_account', {
   updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
 })
 
+export const tenantAuthUsers = pgTable(
+  'tenant_auth_user',
+  {
+    id: text('id').primaryKey(),
+    tenantId: text('tenant_id')
+      .notNull()
+      .references(() => tenants.id, { onDelete: 'cascade' }),
+    name: text('name').notNull(),
+    email: text('email').notNull(),
+    emailVerified: boolean('email_verified').default(false).notNull(),
+    image: text('image'),
+    role: text('role').default('guest').notNull(),
+    createdAt: timestamp('created_at', { mode: 'string' }).defaultNow().notNull(),
+    updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
+    twoFactorEnabled: boolean('two_factor_enabled').default(false).notNull(),
+    username: text('username'),
+    displayUsername: text('display_username'),
+    banned: boolean('banned').default(false).notNull(),
+    banReason: text('ban_reason'),
+    banExpires: timestamp('ban_expires_at', { mode: 'string' }),
+  },
+  (t) => [unique('uq_tenant_auth_user_tenant_email').on(t.tenantId, t.email)],
+)
+
+export const tenantAuthSessions = pgTable('tenant_auth_session', {
+  id: text('id').primaryKey(),
+  tenantId: text('tenant_id')
+    .notNull()
+    .references(() => tenants.id, { onDelete: 'cascade' }),
+  expiresAt: timestamp('expires_at', { mode: 'string' }).notNull(),
+  token: text('token').notNull().unique(),
+  createdAt: timestamp('created_at', { mode: 'string' }).defaultNow().notNull(),
+  updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
+  ipAddress: text('ip_address'),
+  userAgent: text('user_agent'),
+  userId: text('user_id')
+    .notNull()
+    .references(() => tenantAuthUsers.id, { onDelete: 'cascade' }),
+})
+
+export const tenantAuthAccounts = pgTable('tenant_auth_account', {
+  id: text('id').primaryKey(),
+  tenantId: text('tenant_id')
+    .notNull()
+    .references(() => tenants.id, { onDelete: 'cascade' }),
+  accountId: text('account_id').notNull(),
+  providerId: text('provider_id').notNull(),
+  userId: text('user_id')
+    .notNull()
+    .references(() => tenantAuthUsers.id, { onDelete: 'cascade' }),
+  accessToken: text('access_token'),
+  refreshToken: text('refresh_token'),
+  idToken: text('id_token'),
+  accessTokenExpiresAt: timestamp('access_token_expires_at', { mode: 'string' }),
+  refreshTokenExpiresAt: timestamp('refresh_token_expires_at', { mode: 'string' }),
+  scope: text('scope'),
+  password: text('password'),
+  createdAt: timestamp('created_at', { mode: 'string' }).defaultNow().notNull(),
+  updatedAt: timestamp('updated_at', { mode: 'string' }).defaultNow().notNull(),
+})
+
 export const settings = pgTable(
   'settings',
   {
@@ -206,10 +250,12 @@ export const photoAssets = pgTable(
 
 export const dbSchema = {
   tenants,
-  tenantDomains,
   authUsers,
   authSessions,
   authAccounts,
+  tenantAuthUsers,
+  tenantAuthSessions,
+  tenantAuthAccounts,
   settings,
   systemSettings,
   reactions,
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 5e727c9b..a196aec2 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -41,6 +41,7 @@ const hyobanConfig = await defineConfig(
       },
     },
     rules: {
+      'unicorn/no-abusive-eslint-disable': 0,
       '@typescript-eslint/triple-slash-reference': 0,
       'unicorn/prefer-math-trunc': 'off',
       'unicorn/no-static-only-class': 'off',
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index c3b8c06d..99098e5c 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -3,4 +3,5 @@ export * from './cn'
 export * from './semaphore'
 export * from './spring'
 export * from './storage-provider'
+export * from './tenant'
 export * from './u8array'
diff --git a/packages/utils/src/tenant.ts b/packages/utils/src/tenant.ts
new file mode 100644
index 00000000..dffeac75
--- /dev/null
+++ b/packages/utils/src/tenant.ts
@@ -0,0 +1,12 @@
+const RESERVED_SLUGS = ['admin', 'docs', 'support', 'status', 'api', 'assets', 'static', 'www'] as const
+
+export const RESERVED_TENANT_SLUGS = RESERVED_SLUGS
+
+export type ReservedTenantSlug = (typeof RESERVED_TENANT_SLUGS)[number]
+
+export function isTenantSlugReserved(slug: string): boolean {
+  const normalized = slug.trim().toLowerCase()
+  return RESERVED_TENANT_SLUGS.includes(normalized as ReservedTenantSlug)
+}
+
+export const DEFAULT_BASE_DOMAIN = 'afilmory.art'