feat(i18n): add shared i18n package as single source of truth

- Create packages/i18n with source ARB files
- Add build script to generate web JSON and mobile ARB files
- Remove apps/web/public/locales (replaced by apps/web/messages)
- Remove .github/workflows/ci.yml
- Migrate biome config to v2.3.11

Author: gracefullight

.github/workflows/ci.yml

@@ -5,6 +5,31 @@
     "description": "The app title"
   },
   "loading": "Loading...",
+  "@loading": {
+    "description": "Loading indicator text"
+  },
   "error": "An error occurred",
-  "retry": "Retry"
+  "@error": {
+    "description": "Generic error message"
+  },
+  "retry": "Retry",
+  "@retry": {
+    "description": "Retry button text"
+  },
+  "save": "Save",
+  "@save": {
+    "description": "Save button text"
+  },
+  "cancel": "Cancel",
+  "@cancel": {
+    "description": "Cancel button text"
+  },
+  "confirm": "Confirm",
+  "@confirm": {
+    "description": "Confirm button text"
+  },
+  "delete": "Delete",
+  "@delete": {
+    "description": "Delete button text"
+  }
 }

apps/mobile/lib/l10n/app_en.arb

@@ -3,5 +3,9 @@
   "appTitle": "フルスタックスターター",
   "loading": "読み込み中...",
   "error": "エラーが発生しました",
-  "retry": "再試行"
+  "retry": "再試行",
+  "save": "保存",
+  "cancel": "キャンセル",
+  "confirm": "確認",
+  "delete": "削除"
 }

apps/mobile/lib/l10n/app_ja.arb

@@ -3,5 +3,9 @@
   "appTitle": "풀스택 스타터",
   "loading": "로딩 중...",
   "error": "오류가 발생했습니다",
-  "retry": "재시도"
+  "retry": "재시도",
+  "save": "저장",
+  "cancel": "취소",
+  "confirm": "확인",
+  "delete": "삭제"
 }

apps/mobile/lib/l10n/app_ko.arb

@@ -3,6 +3,7 @@
   "common": {
     "loading": "Loading...",
     "error": "An error occurred",
+    "retry": "Retry",
     "save": "Save",
     "cancel": "Cancel",
     "confirm": "Confirm",

apps/web/public/locales/en/common.json apps/web/messages/en.jsonapps/web/public/locales/en/common.json renamed to apps/web/messages/en.json

@@ -1,8 +1,9 @@
 {
-  "title": "Fullstack Starter",
+  "title": "フルスタックスターター",
   "common": {
     "loading": "読み込み中...",
     "error": "エラーが発生しました",
+    "retry": "再試行",
     "save": "保存",
     "cancel": "キャンセル",
     "confirm": "確認",

apps/web/public/locales/ja/common.json apps/web/messages/ja.jsonapps/web/public/locales/ja/common.json renamed to apps/web/messages/ja.json

@@ -1,8 +1,9 @@
 {
-  "title": "Fullstack Starter",
+  "title": "풀스택 스타터",
   "common": {
     "loading": "로딩 중...",
     "error": "오류가 발생했습니다",
+    "retry": "재시도",
     "save": "저장",
     "cancel": "취소",
     "confirm": "확인",

apps/web/public/locales/ko/common.json apps/web/messages/ko.jsonapps/web/public/locales/ko/common.json renamed to apps/web/messages/ko.json

@@ -1,20 +1,21 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.0.0/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.3.11/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
     "useIgnoreFile": true
   },
   "files": {
     "ignoreUnknown": true,
-    "ignore": [
-      "node_modules",
-      ".next",
-      "dist",
-      "build",
-      "coverage",
-      "*.gen.ts",
-      "apps/web/src/lib/api/**"
+    "includes": [
+      "**",
+      "!**/node_modules",
+      "!**/.next",
+      "!**/dist",
+      "!**/build",
+      "!**/coverage",
+      "!**/*.gen.ts",
+      "!**/apps/web/src/lib/api/**"
     ]
   },
   "formatter": {

biome.json

@@ -9,7 +9,8 @@
     "dev:web": "mise run dev:web",
     "dev:worker": "mise run dev:worker",
     "lint": "biome check .",
-    "format": "biome check --write ."
+    "format": "biome check --write .",
+    "i18n:build": "pnpm --filter @workspace/i18n build"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.3.11",