feat: Add App Center plugin functionality

web/src/apps/PluginHost/index.tsx

@@ -0,0 +1,57 @@
+import React, { useRef, useState } from 'react';
+import type { AppComponentProps } from '../types';
+import { vfsApi } from '../../api/vfs';
+import { loadPluginFromUrl, ensureManifest, type RegisteredPlugin } from '../../plugins/runtime';
+import type { PluginItem } from '../../api/plugins';
+import { useAsyncSafeEffect } from '../../hooks/useAsyncSafeEffect';
+
+export interface PluginAppHostProps extends AppComponentProps {
+  plugin: PluginItem;
+}
+
+export const PluginAppHost: React.FC<PluginAppHostProps> = ({ plugin, filePath, entry, onRequestClose }) => {
+  const containerRef = useRef<HTMLDivElement>(null);
+  const [error, setError] = useState<string | null>(null);
+  const onCloseRef = useRef(onRequestClose);
+  onCloseRef.current = onRequestClose;
+
+  const pluginRef = useRef<RegisteredPlugin | null>(null);
+
+  useAsyncSafeEffect(
+    async ({ isDisposed }) => {
+      try {
+        const p = await loadPluginFromUrl(plugin.url);
+        if (isDisposed()) return;
+        pluginRef.current = p;
+        await ensureManifest(plugin.id, p);
+        if (isDisposed()) return;
+        const token = await vfsApi.getTempLinkToken(filePath);
+        if (isDisposed()) return;
+        const downloadUrl = vfsApi.getTempPublicUrl(token.token);
+        if (isDisposed() || !containerRef.current) return;
+        await p.mount(containerRef.current, {
+          filePath,
+          entry,
+          urls: { downloadUrl },
+          host: { close: () => onCloseRef.current() },
+        });
+      } catch (e: any) {
+        if (!isDisposed()) setError(e?.message || '插件运行失败');
+      }
+    },
+    [plugin.id, plugin.url, filePath],
+    () => {
+      try {
+        if (pluginRef.current?.unmount && containerRef.current) {
+          pluginRef.current.unmount(containerRef.current);
+        }
+      } catch {}
+    },
+  );
+
+  if (error) {
+    return <div style={{ padding: 12, color: 'red' }}>插件错误: {error}</div>;
+  }
+
+  return <div ref={containerRef} style={{ width: '100%', height: '100%', overflow: 'auto' }} />;
+};