per-locale bundle & inline locale (#16369)

* feat: split entry file by locale name

* chore: とりあえず transform hook で雑に分割

* chore: とりあえず transform 結果をいい感じに

* chore: concurrent buildで高速化

* chore: vite ではローケルのないものをビルドして後処理でどうにかするように

* chore: 後処理のためにi18n.jを単体になるように切り出す

* chore: use typescript

* chore: remove unref(i18n) in vite build process

* chore: inline variable

* fix: build error

* fix: i18n.ts.something.replaceAll() become error

* chore: ignore export specifier from error

* chore: support i18n.tsx as object

* chore: process literal for all files

* chore: split config and locale

* chore: inline locale name

* chore: remove updating locale in boot common

* chore: use top-level await to load locales

* chore: inline locale

* chore: remove loading locale from boot.js

* chore: remove loading locale from boot.js

* コメント追加

* fix test; fetchに失敗する

* import削除ログをdebugレベルに

* fix: watch pug

* chore: use hash for entry files

* chore: remove es-module-lexer from dependencies

* chore: move to frontend-builder

* chore: use inline locale in embed

* chore: refetch json on hot reload

* feat: store localization related to boot.js in backend in bootloaderLocales localstorage

* 応急処置を戻す

* fix spex

* fix `Using i18n identifier "e" directly. Skipping inlining.` warning

* refactor: use scriptsDir parameter

* chore: remove i18n from depmap

* chore: make build crash if errors

* error -> warn few conditions

* use inline object

* update localstorage keys

* remove accessing locale localstorage

* fix: failed to process i18n.tsx.aaa({x:i18n.bbb})

1 files changed, 25 insertions, 0 deletions

diff --git a/packages/frontend-builder/package.json b/packages/frontend-builder/package.json
new file mode 100644
index 0000000000..5fdd25b32d
--- /dev/null
+++ b/packages/frontend-builder/package.json
@@ -0,0 +1,25 @@
+{
+	"name": "frontend-builder",
+	"type": "module",
+	"scripts": {
+		"eslint": "eslint './**/*.{js,jsx,ts,tsx}'",
+		"typecheck": "tsc --noEmit",
+		"lint": "pnpm typecheck && pnpm eslint"
+	},
+	"exports": {
+		"./*": "./js/*"
+	},
+	"devDependencies": {
+		"@types/estree": "1.0.8",
+		"@types/node": "22.17.0",
+		"@typescript-eslint/eslint-plugin": "8.38.0",
+		"@typescript-eslint/parser": "8.38.0",
+		"rollup": "4.46.2",
+		"typescript": "5.9.2"
+	},
+	"dependencies": {
+		"estree-walker": "3.0.3",
+		"magic-string": "0.30.17",
+		"vite": "7.0.6"
+	}
+}