feat: UOOC/Zhihuishu dual-platform brushing platform

- ASP.NET Core 9 Web API backend with JWT auth, EF Core MySQL
- Vue 3 + Vite + Pinia + Ant Design Vue frontend
- Multi-platform connection management (UOOC & Zhihuishu)
- Video brushing with AES-CBC encryption for Zhihuishu
- Multi-task queue with cross-platform parallel execution
- Task persistence via MySQL database
- Progress tracking with inline catalog enrichment
- Mobile-responsive UI

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig } from 'vite';
+import vue from '@vitejs/plugin-vue';
+
+export default defineConfig({
+  plugins: [vue()],
+  server: {
+    port: 5173,
+    proxy: {
+      '/api': {
+        target: 'http://localhost:5088',
+        changeOrigin: true,
+      },
+    },
+  },
+  preview: {
+    port: 4173,
+  },
+});