refactor: improve import order and code formatting

- Reordered and grouped imports consistently in backend and frontend files for better readability.
- Applied indentation and formatting fixes across frontend components, services, and backend modules.
- Adjusted multiline method calls and type definitions for improved clarity.

backend/src/realtime/events.gateway.ts

@@ -60,7 +60,7 @@ export class EventsGateway
 
 			const payload = await this.jwtService.verifyJwt(session.accessToken);
 			client.data.user = payload;
-			
+
 			// Rejoindre une room personnelle pour les notifications
 			client.join(`user:${payload.sub}`);