feat: scaffold Vue 3 + TypeScript + Vite frontend admin panel

Set up web/ directory with complete frontend scaffolding:
- Vue 3 + TypeScript + Vite with Tailwind CSS v4
- Vue Router with auth guard (redirects to /login when unauthenticated)
- Pinia stores: auth, cookies, devices, settings
- Axios HTTP client with token interceptor
- Views: Login, Dashboard, Cookies, Devices, Settings
- Vite dev server proxy to relay API on port 8100
- Headless UI and Heroicons dependencies

Co-Authored-By: Paperclip <noreply@paperclip.ing>

web/vite.config.ts

@@ -0,0 +1,30 @@
+import { defineConfig } from "vite";
+import vue from "@vitejs/plugin-vue";
+import tailwindcss from "@tailwindcss/vite";
+import { resolve } from "node:path";
+
+export default defineConfig({
+  plugins: [vue(), tailwindcss()],
+  resolve: {
+    alias: {
+      "@": resolve(__dirname, "src"),
+    },
+  },
+  server: {
+    port: 5173,
+    proxy: {
+      "/api": {
+        target: "http://localhost:8100",
+        changeOrigin: true,
+      },
+      "/ws": {
+        target: "ws://localhost:8100",
+        ws: true,
+      },
+      "/health": {
+        target: "http://localhost:8100",
+        changeOrigin: true,
+      },
+    },
+  },
+});