refactor(snapshot): store unified patches in file diffs (#21244)

Co-authored-by: Adam <2363879+adamdotdevin@users.noreply.github.com>

packages/app/src/context/global-sync/event-reducer.ts

@@ -1,7 +1,6 @@
 import { Binary } from "@opencode-ai/util/binary"
 import { produce, reconcile, type SetStoreFunction, type Store } from "solid-js/store"
 import type {
-  FileDiff,
   Message,
   Part,
   PermissionRequest,
@@ -9,6 +8,7 @@ import type {
   QuestionRequest,
   Session,
   SessionStatus,
+  SnapshotFileDiff,
   Todo,
 } from "@opencode-ai/sdk/v2/client"
 import type { State, VcsCache } from "./types"
@@ -161,7 +161,7 @@ export function applyDirectoryEvent(input: {
       break
     }
     case "session.diff": {
-      const props = event.properties as { sessionID: string; diff: FileDiff[] }
+      const props = event.properties as { sessionID: string; diff: SnapshotFileDiff[] }
       input.setStore("session_diff", props.sessionID, reconcile(props.diff, { key: "file" }))
       break
     }

packages/app/src/context/global-sync/session-cache.test.ts

@@ -1,11 +1,11 @@
 import { describe, expect, test } from "bun:test"
 import type {
-  FileDiff,
   Message,
   Part,
   PermissionRequest,
   QuestionRequest,
   SessionStatus,
+  SnapshotFileDiff,
   Todo,
 } from "@opencode-ai/sdk/v2/client"
 import { dropSessionCaches, pickSessionCacheEvictions } from "./session-cache"
@@ -33,7 +33,7 @@ describe("app session cache", () => {
   test("dropSessionCaches clears orphaned parts without message rows", () => {
     const store: {
       session_status: Record<string, SessionStatus | undefined>
-      session_diff: Record<string, FileDiff[] | undefined>
+      session_diff: Record<string, SnapshotFileDiff[] | undefined>
       todo: Record<string, Todo[] | undefined>
       message: Record<string, Message[] | undefined>
       part: Record<string, Part[] | undefined>
@@ -64,7 +64,7 @@ describe("app session cache", () => {
     const m = msg("msg_1", "ses_1")
     const store: {
       session_status: Record<string, SessionStatus | undefined>
-      session_diff: Record<string, FileDiff[] | undefined>
+      session_diff: Record<string, SnapshotFileDiff[] | undefined>
       todo: Record<string, Todo[] | undefined>
       message: Record<string, Message[] | undefined>
       part: Record<string, Part[] | undefined>

packages/app/src/context/global-sync/session-cache.ts

@@ -1,10 +1,10 @@
 import type {
-  FileDiff,
   Message,
   Part,
   PermissionRequest,
   QuestionRequest,
   SessionStatus,
+  SnapshotFileDiff,
   Todo,
 } from "@opencode-ai/sdk/v2/client"
 
@@ -12,7 +12,7 @@ export const SESSION_CACHE_LIMIT = 40
 
 type SessionCache = {
   session_status: Record<string, SessionStatus | undefined>
-  session_diff: Record<string, FileDiff[] | undefined>
+  session_diff: Record<string, SnapshotFileDiff[] | undefined>
   todo: Record<string, Todo[] | undefined>
   message: Record<string, Message[] | undefined>
   part: Record<string, Part[] | undefined>

packages/app/src/context/global-sync/types.ts

@@ -2,7 +2,6 @@ import type {
   Agent,
   Command,
   Config,
-  FileDiff,
   LspStatus,
   McpStatus,
   Message,
@@ -14,6 +13,7 @@ import type {
   QuestionRequest,
   Session,
   SessionStatus,
+  SnapshotFileDiff,
   Todo,
   VcsInfo,
 } from "@opencode-ai/sdk/v2/client"
@@ -48,7 +48,7 @@ export type State = {
     [sessionID: string]: SessionStatus
   }
   session_diff: {
-    [sessionID: string]: FileDiff[]
+    [sessionID: string]: SnapshotFileDiff[]
   }
   todo: {
     [sessionID: string]: Todo[]