Enhance frontend UI and functionality

- Added page transition effects in app.vue for smoother navigation.
- Updated nuxt.config.ts to include custom font styles and page transitions.
- Improved loading indicators in MapPageWrapper.vue and login.vue for better user experience.
- Enhanced MapView.vue with a collapsible control panel and improved styling.
- Introduced new icons for various components to enhance visual consistency.
- Updated Tailwind CSS configuration to extend font families and improve theme management.
- Refined layout styles in default.vue and admin pages for better responsiveness and aesthetics.
- Implemented error handling and loading states across various forms for improved user feedback.

frontend-nuxt/vite/vite-uri-guard.ts

@@ -0,0 +1,31 @@
+import type { Plugin } from 'vite'
+
+/**
+ * Dev-only: reject requests with malformed URIs before Vite's static/transform
+ * middleware runs decodeURI(), which would throw and crash the server.
+ * See: https://github.com/vitejs/vite/issues/6482
+ */
+export function viteUriGuard(): Plugin {
+  return {
+    name: 'vite-uri-guard',
+    apply: 'serve',
+    configureServer(server) {
+      const guard = (req: any, res: any, next: () => void) => {
+        const raw = req.url ?? req.originalUrl ?? ''
+        try {
+          decodeURI(raw)
+          const path = raw.includes('?') ? raw.slice(0, raw.indexOf('?')) : raw
+          if (path) decodeURI(path)
+        } catch {
+          res.statusCode = 400
+          res.setHeader('Content-Type', 'text/plain')
+          res.end('Bad Request: malformed URI')
+          return
+        }
+        next()
+      }
+      // Prepend so we run before Vite's static/transform middleware (which calls decodeURI)
+      server.middlewares.stack.unshift({ route: '', handle: guard })
+    },
+  }
+}