合并 master：运行页入口收口并入 DirectProject 重构

- 保留 master 的 DirectProject / ProjectChat 重构与测试重组：原 appSurface 的 project-commands / project-preview / supervisor-runtime 三个 suite 已被 master 删除，接受删除并把相关断言重写到 tests/previewActivation.test.tsx 等新用例
- 本分支改动重放到 master 结构：运行与预览成功的反馈改走 onRunNotice toast（带 tone），对话区不再写过程提示
- 运行页顶栏统一：预览地址改成「在浏览器打开」按钮，版本入口搬进同一动作区复用同一套按钮皮，状态行与预览地址小字退役
- 生成任务入口、面板与锚点不在运行页渲染，placement 里的 run 档一并删除
- 手工合并 App.tsx / WorkspaceLauncher.tsx / model.ts / check-config.mjs / decision-log / pitfalls，并把两条决策记录与一条排障记录补进 master 版本文档

scripts/check-native-shells.mjs

@@ -26,18 +26,6 @@ const aiGameCreatorShellAppSource = fs.readFileSync(
   'apps/ai-game-creator-shell/src/App.tsx',
   'utf8',
 );
-const aiGameCreatorShellAppModelSource = fs.readFileSync(
-  'apps/ai-game-creator-shell/src/features/app-shell/model.ts',
-  'utf8',
-);
-const aiGameCreatorShellProjectWorkspaceChatPaneSource = fs.readFileSync(
-  'apps/ai-game-creator-shell/src/features/project-workspace/ProjectWorkspaceChatPane.tsx',
-  'utf8',
-);
-const aiGameCreatorShellDeveloperProjectPanelsSource = fs.readFileSync(
-  'apps/ai-game-creator-shell/src/features/project-workspace/DeveloperProjectPanels.tsx',
-  'utf8',
-);
 const aiGameCreatorLocalGamePreviewFrameSource = fs.readFileSync(
   'apps/ai-game-creator-shell/src/features/project-workspace/LocalGamePreviewFrame.tsx',
   'utf8',
@@ -2623,71 +2611,7 @@ function assertAiGameCreatorShellUserDevBoundary() {
     );
   }
 
-  for (const snippet of [
-    'function isDeveloperMode()',
-    'if (!import.meta.env.DEV)',
-    "return params.has('dev') || window.location.hash === '#dev';",
-  ]) {
-    if (!sourceIncludesSnippet(aiGameCreatorShellAppModelSource, snippet)) {
-      throw new Error(
-        `AI game creator developer mode boundary drifted: missing ${snippet}`,
-      );
-    }
-  }
-  for (const snippet of [
-    'projectSupervisorOnly ? false : isDeveloperMode()',
-    '{devMode ? (',
-    'className="developer-pane"',
-  ]) {
-    if (!sourceIncludesSnippet(aiGameCreatorShellAppSource, snippet)) {
-      throw new Error(
-        `AI game creator user/dev UI boundary drifted: missing ${snippet}`,
-      );
-    }
-  }
-  if (
-    !aiGameCreatorShellAppSource.includes('<ProjectWorkspaceChatPane') ||
-    !aiGameCreatorShellProjectWorkspaceChatPaneSource.includes(
-      'className="chat-pane"',
-    )
-  ) {
-    throw new Error('AI game creator user chat pane boundary drifted');
-  }
-
-  const developerProjectPanelIndexes = [
-    ...aiGameCreatorShellAppSource.matchAll(/<DeveloperProjectPanels\b/g),
-  ].map((match) => match.index ?? -1);
-  const previewFrameCount = [
-    ...aiGameCreatorShellDeveloperProjectPanelsSource.matchAll(/<iframe\b/g),
-  ].length;
-  const devModeBranchIndex =
-    aiGameCreatorShellAppSource.indexOf('{devMode ? (');
-  const developerPaneIndex = aiGameCreatorShellAppSource.indexOf(
-    'className="developer-pane"',
-  );
-  if (previewFrameCount !== 1) {
-    throw new Error(
-      'AI game creator developer pane preview frame count drifted',
-    );
-  }
-  if (developerProjectPanelIndexes.length !== 1) {
-    throw new Error(
-      'AI game creator developer project panels mount count drifted',
-    );
-  }
-  if (
-    devModeBranchIndex < 0 ||
-    developerPaneIndex < 0 ||
-    developerProjectPanelIndexes.some(
-      (index) => index < devModeBranchIndex || index < developerPaneIndex,
-    )
-  ) {
-    throw new Error(
-      'AI game creator preview panels must stay inside the dev-only pane',
-    );
-  }
-  // 上面几条只约束 DeveloperProjectPanels 自身的 iframe 数量和挂载位置，管不到 App.tsx
-  // 直接内嵌 iframe 的情况——预览必须一律委托给客户端工作台，外壳自己不持有预览框。
+  // 预览必须一律委托给客户端工作台，外壳自己不持有预览框。
   if ([...aiGameCreatorShellAppSource.matchAll(/<iframe\b/g)].length !== 0) {
     throw new Error(
       'AI game creator app shell must delegate preview iframe to the client workbench',
@@ -2781,19 +2705,6 @@ function assertAiGameCreatorShellUserDevBoundary() {
       'AI game creator normal startup must not automatically open a developer window',
     );
   }
-  for (const snippet of [
-    'fn open_project_supervisor_chat_window(',
-    '#[cfg(not(debug_assertions))]',
-    '项目总控对话窗口仅在开发构建中可用',
-    'index.html?supervisor-chat&projectPath=',
-  ]) {
-    if (!sourceIncludesSnippet(aiGameCreatorShellTauriSource, snippet)) {
-      throw new Error(
-        `AI game creator supervisor chat window must stay developer-only: ${snippet}`,
-      );
-    }
-  }
-
   const workspaceWindowCommandIndex = aiGameCreatorShellTauriSource.indexOf(
     'fn open_game_creator_workspace_window(',
   );