接入宿主壳原生剪贴板复制路径

H5 复制服务在 native_app 中优先调用 clipboard.writeText

保留浏览器 Clipboard API 与 legacy selection copy 回退路径

补充 HostBridge 剪贴板测试和宿主壳能力文档

src/services/host-bridge/hostBridge.ts

@@ -61,6 +61,10 @@ export type HostShareGridRequest = {
 
 export type HostFileExportTextRequest = FileExportTextPayload;
 
+export type HostClipboardWriteTextRequest = {
+  text: string;
+};
+
 function isUnsupportedHostBridgeError(error: unknown) {
   return (
     error instanceof Error &&
@@ -449,6 +453,20 @@ export async function getNativeAppHostRuntime() {
   );
 }
 
+export async function writeHostClipboardText({
+  text,
+}: HostClipboardWriteTextRequest) {
+  if (getHostRuntime().kind !== 'native_app') {
+    return false;
+  }
+
+  try {
+    return await requestNativeHostBoolean('clipboard.writeText', { text });
+  } catch {
+    return false;
+  }
+}
+
 export async function exportHostTextFile(
   params: HostFileExportTextRequest,
 ) {