Merge main, fix 19 pre-existing test failures, add interactive playgrounds for all features, bundle TypeScript locally

.github/workflows/pages.yml

@@ -33,6 +33,9 @@ jobs:
       - name: Build library for browser
         run: bun build ./src/index.ts --outdir ./playground/dist --target browser --minify
 
+      - name: Bundle TypeScript compiler for offline playground
+        run: cp node_modules/typescript/lib/typescript.js ./playground/dist/typescript.js
+
       - name: Setup Pages
         uses: actions/configure-pages@v5
         with:

biome.json

@@ -7,7 +7,7 @@
   },
   "files": {
     "ignoreUnknown": false,
-    "ignore": ["dist/**", "node_modules/**", "*.d.ts", "playground/**/*.js"]
+    "ignore": ["dist/**", "node_modules/**", "*.d.ts", "playground/**/*.js", "playground/serve.ts"]
   },
   "formatter": {
     "enabled": true,

docs/playground.md

@@ -24,7 +24,8 @@ compiler from CDN and transpiles user code to JavaScript before execution.
 Users can write type annotations, interfaces, and generics — the compiler
 strips them automatically.
 
-- TypeScript compiler: loaded from `https://cdn.jsdelivr.net/npm/typescript@5/lib/typescript.js`
+- TypeScript compiler: bundled locally (`playground/dist/typescript.js`) with
+  CDN fallback (`https://cdn.jsdelivr.net/npm/typescript@5/lib/typescript.js`).
 - No WASM required — the compiler runs natively in JavaScript.
 
 ### 3. Live tsb Library Access
@@ -112,6 +113,7 @@ playground/
 
 ```bash
 bun build ./src/index.ts --outdir ./playground/dist --target browser --minify
+cp node_modules/typescript/lib/typescript.js ./playground/dist/typescript.js
 ```
 
 The CI pipeline (`pages.yml`) runs this automatically during deployment.