fix: collection name mismatch, login/register navigation, and connection config

- Fix teamSessions → team_sessions to match PocketBase collection name
- Replace <a @click> with <router-link> in Login and Register views
- Update PocketBase default URL and vite proxy target
- Comment out docker-compose user directive for permission fix

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -13,7 +13,7 @@ export default defineConfig({
     port: Number(process.env.VITE_PORT) || 5173,
     proxy: {
       '/api': {
-        target: process.env.VITE_PB_URL || 'http://192.168.1.14:8711',
+        target: process.env.VITE_PB_URL || 'http://localhost:8090',
         changeOrigin: true,
         rewrite: (path) => path.replace(/^\/api/, '')
       }