refactor: replace Vite runtime with lightweight Node.js server

Use native http module to serve built static files and proxy API
requests. No Vite dependency at runtime — only needed for building.
This fixes SFC compilation errors on global install.

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

package.json

@@ -13,32 +13,24 @@
   },
   "files": [
     "bin/",
-    "index.html",
-    "public/",
-    "assets/",
-    "src/",
-    "vite.config.ts",
-    "tsconfig.json",
-    "tsconfig.app.json",
-    "tsconfig.node.json",
-    "package.json"
+    "dist/"
   ],
   "dependencies": {
-    "@vitejs/plugin-vue": "^6.0.5",
     "highlight.js": "^11.11.1",
     "markdown-it": "^14.1.1",
     "naive-ui": "^2.44.1",
     "pinia": "^3.0.4",
-    "sass": "^1.99.0",
-    "vite": "^8.0.4",
     "vue": "^3.5.32",
     "vue-router": "^4.6.4"
   },
   "devDependencies": {
     "@types/markdown-it": "^14.1.2",
     "@types/node": "^24.12.2",
+    "@vitejs/plugin-vue": "^6.0.5",
     "@vue/tsconfig": "^0.9.1",
+    "sass": "^1.99.0",
     "typescript": "~6.0.2",
+    "vite": "^8.0.4",
     "vue-tsc": "^3.2.6"
   }
 }