🎨 chore(web): apply ESLint and Prettier auto-fixes (baseline)

- Ran: bun run eslint:fix && bun run lint:fix
- Inserted AGPL license header via eslint-plugin-header
- Enforced no-multiple-empty-lines and other lint rules
- Formatted code using Prettier v3 (@so1ve/prettier-config)
- No functional changes; formatting-only baseline across JS/JSX files

web/vite.config.js

@@ -42,8 +42,8 @@ export default defineConfig({
     },
     react(),
     vitePluginSemi({
-      cssLayer: true
-    })
+      cssLayer: true,
+    }),
   ],
   optimizeDeps: {
     force: true,