fix(app): startup efficiency (#18854)

packages/app/src/context/language.tsx

@@ -1,42 +1,10 @@
 import * as i18n from "@solid-primitives/i18n"
-import { createEffect, createMemo } from "solid-js"
+import { createEffect, createMemo, createResource } from "solid-js"
 import { createStore } from "solid-js/store"
 import { createSimpleContext } from "@opencode-ai/ui/context"
 import { Persist, persisted } from "@/utils/persist"
 import { dict as en } from "@/i18n/en"
-import { dict as zh } from "@/i18n/zh"
-import { dict as zht } from "@/i18n/zht"
-import { dict as ko } from "@/i18n/ko"
-import { dict as de } from "@/i18n/de"
-import { dict as es } from "@/i18n/es"
-import { dict as fr } from "@/i18n/fr"
-import { dict as da } from "@/i18n/da"
-import { dict as ja } from "@/i18n/ja"
-import { dict as pl } from "@/i18n/pl"
-import { dict as ru } from "@/i18n/ru"
-import { dict as ar } from "@/i18n/ar"
-import { dict as no } from "@/i18n/no"
-import { dict as br } from "@/i18n/br"
-import { dict as th } from "@/i18n/th"
-import { dict as bs } from "@/i18n/bs"
-import { dict as tr } from "@/i18n/tr"
 import { dict as uiEn } from "@opencode-ai/ui/i18n/en"
-import { dict as uiZh } from "@opencode-ai/ui/i18n/zh"
-import { dict as uiZht } from "@opencode-ai/ui/i18n/zht"
-import { dict as uiKo } from "@opencode-ai/ui/i18n/ko"
-import { dict as uiDe } from "@opencode-ai/ui/i18n/de"
-import { dict as uiEs } from "@opencode-ai/ui/i18n/es"
-import { dict as uiFr } from "@opencode-ai/ui/i18n/fr"
-import { dict as uiDa } from "@opencode-ai/ui/i18n/da"
-import { dict as uiJa } from "@opencode-ai/ui/i18n/ja"
-import { dict as uiPl } from "@opencode-ai/ui/i18n/pl"
-import { dict as uiRu } from "@opencode-ai/ui/i18n/ru"
-import { dict as uiAr } from "@opencode-ai/ui/i18n/ar"
-import { dict as uiNo } from "@opencode-ai/ui/i18n/no"
-import { dict as uiBr } from "@opencode-ai/ui/i18n/br"
-import { dict as uiTh } from "@opencode-ai/ui/i18n/th"
-import { dict as uiBs } from "@opencode-ai/ui/i18n/bs"
-import { dict as uiTr } from "@opencode-ai/ui/i18n/tr"
 
 export type Locale =
   | "en"
@@ -59,6 +27,7 @@ export type Locale =
 
 type RawDictionary = typeof en & typeof uiEn
 type Dictionary = i18n.Flatten<RawDictionary>
+type Source = { dict: Record<string, string> }
 
 function cookie(locale: Locale) {
   return `oc_locale=${encodeURIComponent(locale)}; Path=/; Max-Age=31536000; SameSite=Lax`
@@ -125,24 +94,43 @@ const LABEL_KEY: Record<Locale, keyof Dictionary> = {
 }
 
 const base = i18n.flatten({ ...en, ...uiEn })
-const DICT: Record<Locale, Dictionary> = {
-  en: base,
-  zh: { ...base, ...i18n.flatten({ ...zh, ...uiZh }) },
-  zht: { ...base, ...i18n.flatten({ ...zht, ...uiZht }) },
-  ko: { ...base, ...i18n.flatten({ ...ko, ...uiKo }) },
-  de: { ...base, ...i18n.flatten({ ...de, ...uiDe }) },
-  es: { ...base, ...i18n.flatten({ ...es, ...uiEs }) },
-  fr: { ...base, ...i18n.flatten({ ...fr, ...uiFr }) },
-  da: { ...base, ...i18n.flatten({ ...da, ...uiDa }) },
-  ja: { ...base, ...i18n.flatten({ ...ja, ...uiJa }) },
-  pl: { ...base, ...i18n.flatten({ ...pl, ...uiPl }) },
-  ru: { ...base, ...i18n.flatten({ ...ru, ...uiRu }) },
-  ar: { ...base, ...i18n.flatten({ ...ar, ...uiAr }) },
-  no: { ...base, ...i18n.flatten({ ...no, ...uiNo }) },
-  br: { ...base, ...i18n.flatten({ ...br, ...uiBr }) },
-  th: { ...base, ...i18n.flatten({ ...th, ...uiTh }) },
-  bs: { ...base, ...i18n.flatten({ ...bs, ...uiBs }) },
-  tr: { ...base, ...i18n.flatten({ ...tr, ...uiTr }) },
+const dicts = new Map<Locale, Dictionary>([["en", base]])
+
+const merge = (app: Promise<Source>, ui: Promise<Source>) =>
+  Promise.all([app, ui]).then(([a, b]) => ({ ...base, ...i18n.flatten({ ...a.dict, ...b.dict }) }) as Dictionary)
+
+const loaders: Record<Exclude<Locale, "en">, () => Promise<Dictionary>> = {
+  zh: () => merge(import("@/i18n/zh"), import("@opencode-ai/ui/i18n/zh")),
+  zht: () => merge(import("@/i18n/zht"), import("@opencode-ai/ui/i18n/zht")),
+  ko: () => merge(import("@/i18n/ko"), import("@opencode-ai/ui/i18n/ko")),
+  de: () => merge(import("@/i18n/de"), import("@opencode-ai/ui/i18n/de")),
+  es: () => merge(import("@/i18n/es"), import("@opencode-ai/ui/i18n/es")),
+  fr: () => merge(import("@/i18n/fr"), import("@opencode-ai/ui/i18n/fr")),
+  da: () => merge(import("@/i18n/da"), import("@opencode-ai/ui/i18n/da")),
+  ja: () => merge(import("@/i18n/ja"), import("@opencode-ai/ui/i18n/ja")),
+  pl: () => merge(import("@/i18n/pl"), import("@opencode-ai/ui/i18n/pl")),
+  ru: () => merge(import("@/i18n/ru"), import("@opencode-ai/ui/i18n/ru")),
+  ar: () => merge(import("@/i18n/ar"), import("@opencode-ai/ui/i18n/ar")),
+  no: () => merge(import("@/i18n/no"), import("@opencode-ai/ui/i18n/no")),
+  br: () => merge(import("@/i18n/br"), import("@opencode-ai/ui/i18n/br")),
+  th: () => merge(import("@/i18n/th"), import("@opencode-ai/ui/i18n/th")),
+  bs: () => merge(import("@/i18n/bs"), import("@opencode-ai/ui/i18n/bs")),
+  tr: () => merge(import("@/i18n/tr"), import("@opencode-ai/ui/i18n/tr")),
+}
+
+function loadDict(locale: Locale) {
+  const hit = dicts.get(locale)
+  if (hit) return Promise.resolve(hit)
+  if (locale === "en") return Promise.resolve(base)
+  const load = loaders[locale]
+  return load().then((next: Dictionary) => {
+    dicts.set(locale, next)
+    return next
+  })
+}
+
+export function loadLocaleDict(locale: Locale) {
+  return loadDict(locale).then(() => undefined)
 }
 
 const localeMatchers: Array<{ locale: Locale; match: (language: string) => boolean }> = [
@@ -168,27 +156,6 @@ const localeMatchers: Array<{ locale: Locale; match: (language: string) => boole
   { locale: "tr", match: (language) => language.startsWith("tr") },
 ]
 
-type ParityKey = "command.session.previous.unseen" | "command.session.next.unseen"
-const PARITY_CHECK: Record<Exclude<Locale, "en">, Record<ParityKey, string>> = {
-  zh,
-  zht,
-  ko,
-  de,
-  es,
-  fr,
-  da,
-  ja,
-  pl,
-  ru,
-  ar,
-  no,
-  br,
-  th,
-  bs,
-  tr,
-}
-void PARITY_CHECK
-
 function detectLocale(): Locale {
   if (typeof navigator !== "object") return "en"
 
@@ -203,27 +170,48 @@ function detectLocale(): Locale {
   return "en"
 }
 
-function normalizeLocale(value: string): Locale {
+export function normalizeLocale(value: string): Locale {
   return LOCALES.includes(value as Locale) ? (value as Locale) : "en"
 }
 
+function readStoredLocale() {
+  if (typeof localStorage !== "object") return
+  try {
+    const raw = localStorage.getItem("opencode.global.dat:language")
+    if (!raw) return
+    const next = JSON.parse(raw) as { locale?: string }
+    if (typeof next?.locale !== "string") return
+    return normalizeLocale(next.locale)
+  } catch {
+    return
+  }
+}
+
+const warm = readStoredLocale() ?? detectLocale()
+if (warm !== "en") void loadDict(warm)
+
 export const { use: useLanguage, provider: LanguageProvider } = createSimpleContext({
   name: "Language",
-  init: () => {
+  init: (props: { locale?: Locale }) => {
+    const initial = props.locale ?? readStoredLocale() ?? detectLocale()
     const [store, setStore, _, ready] = persisted(
       Persist.global("language", ["language.v1"]),
       createStore({
-        locale: detectLocale() as Locale,
+        locale: initial,
       }),
     )
 
     const locale = createMemo<Locale>(() => normalizeLocale(store.locale))
-    console.log("locale", locale())
     const intl = createMemo(() => INTL[locale()])
 
-    const dict = createMemo<Dictionary>(() => DICT[locale()])
+    const [dict] = createResource(locale, loadDict, {
+      initialValue: dicts.get(initial) ?? base,
+    })
 
-    const t = i18n.translator(dict, i18n.resolveTemplate)
+    const t = i18n.translator(() => dict() ?? base, i18n.resolveTemplate) as (
+      key: keyof Dictionary,
+      params?: Record<string, string | number | boolean>,
+    ) => string
 
     const label = (value: Locale) => t(LABEL_KEY[value])