feat: convert editor package to TypeScript

package.json

@@ -3,18 +3,28 @@
   "version": "0.1.0",
   "description": "Schema-driven, layer-based poster and image editor core for Web and mini apps",
   "type": "module",
-  "main": "./src/index.js",
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "exports": {
-    ".": "./src/index.js",
-    "./renderer": "./src/renderer.js",
+    ".": { "types": "./dist/index.d.ts", "import": "./dist/index.js", "require": "./dist/index.cjs" },
+    "./renderer": { "types": "./dist/renderer.d.ts", "import": "./dist/renderer.js", "require": "./dist/renderer.cjs" },
     "./schema": "./schema/poster-document.schema.json",
-    "./xhs": "./xhs/index.cjs"
+    "./xhs": { "types": "./dist/xhs.d.ts", "import": "./dist/xhs.js", "require": "./dist/xhs.cjs" },
+    "./xhs-legacy": "./xhs/index.cjs"
   },
-  "files": ["src", "schema", "xhs"],
+  "files": ["dist", "schema", "xhs"],
   "scripts": {
-    "test": "node --test",
-    "check": "node --check src/index.js && node --check src/renderer.js && node --check xhs/index.cjs"
+    "build": "tsup src/index.ts src/renderer.ts src/xhs.ts --format esm,cjs --dts --sourcemap --clean",
+    "test": "npm run build && node --test test/*.test.mjs",
+    "check": "tsc --noEmit && node --check xhs/index.cjs",
+    "prepack": "npm run check && npm test && npm run build"
+  },
+  "engines": { "node": ">=20.9" },
+  "devDependencies": {
+    "@types/node": "^24.7.0",
+    "tsup": "^8.5.0",
+    "typescript": "^5.9.3"
   },
-  "engines": { "node": ">=20" },
   "license": "UNLICENSED"
 }