新增 Expo 与 Tauri 原生宿主壳

新增 HostBridge 原生宿主契约和 H5 native_app transport

新增 Expo React Native 移动壳并收紧 WebView 外链边界

新增 Tauri 桌面壳并用 capability 收口受控命令

更新宿主壳方案、文档索引和共享记忆

apps/mobile-shell/src/mobileHostBridge.ts

@@ -0,0 +1,213 @@
+import * as Clipboard from 'expo-clipboard';
+import * as Haptics from 'expo-haptics';
+import * as Linking from 'expo-linking';
+import { Platform, Share } from 'react-native';
+
+import {
+  type ClipboardWriteTextPayload,
+  type HapticsImpactPayload,
+  HOST_BRIDGE_PROTOCOL,
+  HOST_BRIDGE_VERSION,
+  type HostBridgeCapability,
+  type HostBridgeError,
+  type HostBridgeMethod,
+  type HostBridgeRequest,
+  type HostBridgeResponse,
+  type OpenExternalUrlPayload,
+  type ShareOpenPayload,
+} from '../../../packages/shared/src/contracts/hostBridge';
+
+export const MOBILE_HOST_CAPABILITIES: HostBridgeCapability[] = [
+  'host.getRuntime',
+  'share.open',
+  'share.setTarget',
+  'app.openExternalUrl',
+  'clipboard.writeText',
+  'haptics.impact',
+];
+
+let currentShareTarget: unknown = null;
+
+function unsupported(method: HostBridgeMethod): HostBridgeError {
+  return {
+    code: 'unsupported_method',
+    message: `${method} unsupported in mobile shell`,
+  };
+}
+
+function invalidRequest(message: string): HostBridgeError {
+  return {
+    code: 'invalid_request',
+    message,
+  };
+}
+
+function isHostBridgeRequest(value: unknown): value is HostBridgeRequest {
+  if (!value || typeof value !== 'object') {
+    return false;
+  }
+
+  const candidate = value as Partial<HostBridgeRequest>;
+  return (
+    candidate.bridge === HOST_BRIDGE_PROTOCOL &&
+    candidate.version === HOST_BRIDGE_VERSION &&
+    typeof candidate.id === 'string' &&
+    typeof candidate.method === 'string'
+  );
+}
+
+function parseRequest(raw: string) {
+  try {
+    return JSON.parse(raw) as unknown;
+  } catch {
+    return null;
+  }
+}
+
+function ok<Result>(
+  request: HostBridgeRequest,
+  result?: Result,
+): HostBridgeResponse<Result> {
+  return {
+    bridge: HOST_BRIDGE_PROTOCOL,
+    version: HOST_BRIDGE_VERSION,
+    id: request.id,
+    ok: true,
+    result,
+  };
+}
+
+function failure(
+  request: Pick<HostBridgeRequest, 'id'>,
+  error: HostBridgeError,
+): HostBridgeResponse {
+  return {
+    bridge: HOST_BRIDGE_PROTOCOL,
+    version: HOST_BRIDGE_VERSION,
+    id: request.id,
+    ok: false,
+    error,
+  };
+}
+
+async function openExternalUrl(payload: unknown) {
+  const url = (payload as OpenExternalUrlPayload | undefined)?.url;
+  if (!url) {
+    throw invalidRequest('url is required');
+  }
+
+  await Linking.openURL(url);
+  return true;
+}
+
+async function writeClipboard(payload: unknown) {
+  const text = (payload as ClipboardWriteTextPayload | undefined)?.text;
+  if (typeof text !== 'string') {
+    throw invalidRequest('text is required');
+  }
+
+  await Clipboard.setStringAsync(text);
+  return true;
+}
+
+async function runHaptics(payload: unknown) {
+  const style = (payload as HapticsImpactPayload | undefined)?.style;
+  const impactStyle =
+    style === 'heavy'
+      ? Haptics.ImpactFeedbackStyle.Heavy
+      : style === 'medium'
+        ? Haptics.ImpactFeedbackStyle.Medium
+        : Haptics.ImpactFeedbackStyle.Light;
+
+  await Haptics.impactAsync(impactStyle);
+  return true;
+}
+
+async function openShare(payload: unknown) {
+  const sharePayload =
+    payload && typeof payload === 'object'
+      ? (payload as ShareOpenPayload)
+      : currentShareTarget && typeof currentShareTarget === 'object'
+        ? (currentShareTarget as ShareOpenPayload)
+        : undefined;
+  const url = sharePayload?.url;
+  const message = [sharePayload?.message, url].filter(Boolean).join('\n');
+
+  await Share.share({
+    title: sharePayload?.title,
+    message: message || url || sharePayload?.title || '',
+    url,
+  });
+  return true;
+}
+
+async function handleRequest(request: HostBridgeRequest) {
+  switch (request.method) {
+    case 'host.getRuntime':
+      return ok(request, {
+        shell: 'expo_mobile',
+        platform: Platform.OS === 'ios' ? 'ios' : 'android',
+        hostVersion: '0.1.0',
+        bridgeVersion: HOST_BRIDGE_VERSION,
+        capabilities: MOBILE_HOST_CAPABILITIES,
+      });
+    case 'app.openExternalUrl':
+      return ok(request, await openExternalUrl(request.payload));
+    case 'clipboard.writeText':
+      return ok(request, await writeClipboard(request.payload));
+    case 'haptics.impact':
+      return ok(request, await runHaptics(request.payload));
+    case 'share.open':
+      return ok(request, await openShare(request.payload));
+    case 'share.setTarget':
+      currentShareTarget =
+        request.payload && typeof request.payload === 'object'
+          ? (request.payload as { target?: unknown }).target
+          : null;
+      return ok(request, true);
+    case 'auth.requestLogin':
+    case 'payment.request':
+    case 'navigation.openNativePage':
+      return failure(request, unsupported(request.method));
+    default:
+      return failure(request, unsupported(request.method));
+  }
+}
+
+function normalizeError(error: unknown): HostBridgeError {
+  if (
+    error &&
+    typeof error === 'object' &&
+    'code' in error &&
+    'message' in error
+  ) {
+    return error as HostBridgeError;
+  }
+
+  return {
+    code: 'host_error',
+    message: error instanceof Error ? error.message : String(error),
+  };
+}
+
+export async function handleMobileHostBridgeMessage(
+  rawMessage: string,
+  sendResponse: (response: HostBridgeResponse) => void,
+) {
+  const parsed = parseRequest(rawMessage);
+  if (!isHostBridgeRequest(parsed)) {
+    sendResponse(
+      failure(
+        { id: 'invalid' },
+        invalidRequest('invalid host bridge request'),
+      ),
+    );
+    return;
+  }
+
+  try {
+    sendResponse(await handleRequest(parsed));
+  } catch (error) {
+    sendResponse(failure(parsed, normalizeError(error)));
+  }
+}