收紧窗口标题载荷边界

将 app.setTitle 标题长度和控制字符规则提升到共享 HostBridge 契约

让 H5 facade 和 Tauri 壳按共享窗口标题边界归一化载荷

增加标题边界测试和三端壳总门禁反查

同步宿主壳协议文档和共享决策记录

src/services/host-bridge/hostBridge.test.ts

@@ -1025,6 +1025,12 @@ describe('hostBridge', () => {
     await expect(setHostAppTitle({ title: ' 拼图 - 陶泥儿 ' })).resolves.toBe(
       true,
     );
+    await expect(
+      setHostAppTitle({ title: 'a'.repeat(90) }),
+    ).resolves.toBe(true);
+    await expect(setHostAppTitle({ title: '拼图\n陶泥儿' })).resolves.toBe(
+      false,
+    );
     await expect(setHostAppBadgeCount({ count: 7 })).resolves.toBe(true);
     await expect(getHostNetworkStatus()).resolves.toEqual({
       isConnected: true,
@@ -1167,6 +1173,14 @@ describe('hostBridge', () => {
         },
       }),
     });
+    expect(invoke).toHaveBeenCalledWith('host_bridge_request', {
+      request: expect.objectContaining({
+        method: 'app.setTitle',
+        payload: {
+          title: 'a'.repeat(80),
+        },
+      }),
+    });
     expect(invoke).toHaveBeenCalledWith('host_bridge_request', {
       request: expect.objectContaining({
         method: 'app.setBadgeCount',

src/services/host-bridge/hostBridge.ts

@@ -26,6 +26,7 @@ import type {
 } from '../../../packages/shared/src/contracts/hostBridge';
 import {
   HOST_BRIDGE_AUDIO_MIME_TYPES,
+  HOST_BRIDGE_APP_TITLE_MAX_LENGTH,
   HOST_BRIDGE_DOCUMENT_MIME_TYPES,
   HOST_BRIDGE_IMAGE_MIME_TYPES,
   HOST_BRIDGE_NATIVE_APP_QUERY,
@@ -37,6 +38,7 @@ import {
   HOST_BRIDGE_WECHAT_MINI_PROGRAM_SOURCE_QUERY,
   isHostBridgeCapability,
   normalizeHostBridgeBadgeCount,
+  normalizeHostBridgeAppTitle,
   normalizeHostBridgeClipboardText,
   normalizeHostBridgeColorScheme,
   normalizeHostBridgeConnectionType,
@@ -1145,15 +1147,13 @@ export async function showHostLocalNotification(
 }
 
 export async function setHostAppTitle({ title }: HostAppTitleRequest) {
-  const normalizedTitle = title.trim();
+  const normalizedTitle = normalizeHostBridgeAppTitle(title);
   if (!normalizedTitle || !canUseNativeHostCapability('app.setTitle')) {
     return false;
   }
 
   try {
-    return await requestNativeHostBoolean('app.setTitle', {
-      title: normalizedTitle,
-    });
+    return await requestNativeHostBoolean('app.setTitle', normalizedTitle);
   } catch {
     return false;
   }