M1: 桥引擎核心（T-M1-01~04）

100% 复刻 lzyzsd/JsBridge（对照原 Android com.tagmae.jsbridge 逐字）：
- IWebController + WebviewControllerAdapter(emitter UI 线程守卫,§5.5) + FakeWebController(单测用)
- Message(5字段,undefined省略) + MessageCodec(toJson/toArray + dispatchMessage 两次正则转义逐字复刻)
- HandlerRegistry + 空实现 DefaultHandler 兜底(H5 调用永不报错最后防线)
- BridgeController:onLoadIntercept(decode→yy://return/yy://)/callHandler/send/onPageEnd/
  flushMessageQueue(_fetchQueue 经 yy://return 回传,非 runJavaScript 返回值)/handleReturnData/
  启动队列补发;对能力零感知、纯逻辑可测
- build 编译通过(ArkTS 严格)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

build-profile.json5

@@ -1,6 +1,20 @@
 {
   "app": {
-    "signingConfigs": [],
+    "signingConfigs": [
+      {
+        "name": "default",
+        "type": "HarmonyOS",
+        "material": {
+          "certpath": "C:\\Users\\Joywayer\\.ohos\\config\\default_gamelobby_Tg3dZWT2uE_yyJID0XfKtliH7uuF1dWWNM21ecODP2A=.cer",
+          "keyAlias": "debugKey",
+          "keyPassword": "0000001BB88B945FF086A71E48E2000AC023983A9F3246CAC3CDD481C5ECCE32627C982DD892BD85A5FBC7",
+          "profile": "C:\\Users\\Joywayer\\.ohos\\config\\default_gamelobby_Tg3dZWT2uE_yyJID0XfKtliH7uuF1dWWNM21ecODP2A=.p7b",
+          "signAlg": "SHA256withECDSA",
+          "storeFile": "C:\\Users\\Joywayer\\.ohos\\config\\default_gamelobby_Tg3dZWT2uE_yyJID0XfKtliH7uuF1dWWNM21ecODP2A=.p12",
+          "storePassword": "0000001B3D659D26D98202CB916B9A08D909956365FC114D150ECBBDDDDB9CC07E454FDF9E65AC7A5198EC"
+        }
+      }
+    ],
     "products": [
       {
         "name": "default",