frontend: list all profiles on Home, pin dev host, widen profiles card

- Home now shows every profile with its picture, an inline Active badge,
  and a working Select button (was only the active profile).
- Remove the Relays card from Home (status lives on the Relays screen) and
  its unused connection-check logic/test.
- Pin Vite dev server to 127.0.0.1 so Electron and the dev server agree on
  the address (fixes white-box window in dev mode).
- Make the profiles card full-width to match the publication card below.
- Badge now accepts className.

frontend/vite.config.ts

@@ -6,6 +6,7 @@ import type { UserConfig } from 'vite';
 export default defineConfig({
   plugins: [react()],
   server: {
+    host: '127.0.0.1',
     port: 5173,
     strictPort: true,
   },