fix(build): add @/ path alias to Vite config and fix tsconfig composite setting

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -2,3 +2,5 @@ __pycache__/
 *.pyc
 *.pyo
 .venv/
+node_modules/
+dist/

frontend/tsconfig.node.json

@@ -5,7 +5,7 @@
     "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
     "strict": true,
-    "noEmit": true,
+    "composite": true,
     "skipLibCheck": true
   },
   "include": ["vite.config.ts"]

frontend/vite.config.ts

@@ -1,8 +1,14 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
+import { fileURLToPath, URL } from 'node:url'
 
 export default defineConfig({
   plugins: [vue()],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url)),
+    },
+  },
   server: {
     proxy: {
       '/api': {