Add local plugin import functionality

Implemented backend API and frontend UI for importing local plugin zip files. The backend now supports file uploads via a new /Plugin/Import endpoint using multer, and the frontend provides a button to upload and import plugins directly from the dashboard.

Prompt to register plugin manager if not loaded

Renames plugin_develop.ts to plugin-develop.ts for consistency. Updates the plugin import handler to prompt the user to register the plugin manager if it is not loaded, improving user experience and error handling.

packages/napcat-webui-backend/src/router/Plugin.ts

@@ -1,4 +1,8 @@
 import { Router } from 'express';
+import multer from 'multer';
+import path from 'path';
+import fs from 'fs';
+import os from 'os';
 import {
   GetPluginListHandler,
   SetPluginStatusHandler,
@@ -7,7 +11,8 @@ import {
   SetPluginConfigHandler,
   RegisterPluginManagerHandler,
   PluginConfigSSEHandler,
-  PluginConfigChangeHandler
+  PluginConfigChangeHandler,
+  ImportLocalPluginHandler
 } from '@/napcat-webui-backend/src/api/Plugin';
 import {
   GetPluginStoreListHandler,
@@ -16,6 +21,39 @@ import {
   InstallPluginFromStoreSSEHandler
 } from '@/napcat-webui-backend/src/api/PluginStore';
 
+// 配置 multer 用于文件上传
+const uploadDir = path.join(os.tmpdir(), 'napcat-plugin-uploads');
+if (!fs.existsSync(uploadDir)) {
+  fs.mkdirSync(uploadDir, { recursive: true });
+}
+
+const storage = multer.diskStorage({
+  destination: (_req, _file, cb) => {
+    cb(null, uploadDir);
+  },
+  filename: (_req, file, cb) => {
+    const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1E9);
+    cb(null, uniqueSuffix + '-' + file.originalname);
+  }
+});
+
+const upload = multer({
+  storage,
+  limits: {
+    fileSize: 50 * 1024 * 1024, // 50MB 限制
+  },
+  fileFilter: (_req, file, cb) => {
+    // 只允许 .zip 文件
+    if (file.mimetype === 'application/zip' ||
+      file.mimetype === 'application/x-zip-compressed' ||
+      file.originalname.endsWith('.zip')) {
+      cb(null, true);
+    } else {
+      cb(new Error('Only .zip files are allowed'));
+    }
+  }
+});
+
 const router: Router = Router();
 
 router.get('/List', GetPluginListHandler);
@@ -26,6 +64,7 @@ router.post('/Config', SetPluginConfigHandler);
 router.get('/Config/SSE', PluginConfigSSEHandler);
 router.post('/Config/Change', PluginConfigChangeHandler);
 router.post('/RegisterManager', RegisterPluginManagerHandler);
+router.post('/Import', upload.single('plugin'), ImportLocalPluginHandler);
 
 // 插件商店相关路由
 router.get('/Store/List', GetPluginStoreListHandler);