feat: add user search functionality

- Implemented `GET /users/search` endpoint in the backend to enable user search by username or display name.
- Added `search` method in `UsersService` and `UsersRepository`.
- Updated frontend `UserService` to support the new search API.

backend/src/users/repositories/users.repository.ts

@@ -1,5 +1,5 @@
 import { Injectable } from "@nestjs/common";
-import { and, eq, lte, sql } from "drizzle-orm";
+import { and, count, eq, ilike, or, sql } from "drizzle-orm";
 import { DatabaseService } from "../../database/database.service";
 import { contents, favorites, users } from "../../database/schemas";
 
@@ -97,6 +97,21 @@ export class UsersRepository {
 		return result[0] || null;
 	}
 
+	async search(query: string) {
+		return this.databaseService.db
+			.select({
+				uuid: users.uuid,
+				username: users.username,
+				displayName: users.displayName,
+				avatarUrl: users.avatarUrl,
+			})
+			.from(users)
+			.where(
+				or(ilike(users.username, `%${query}%`), ilike(users.displayName, `%${query}%`)),
+			)
+			.limit(10);
+	}
+
 	async findOne(uuid: string) {
 		const result = await this.databaseService.db
 			.select()

backend/src/users/users.controller.ts

@@ -54,6 +54,12 @@ export class UsersController {
 		return this.usersService.findPublicProfile(username);
 	}
 
+	@Get("search")
+	@UseGuards(AuthGuard)
+	search(@Query("q") query: string) {
+		return this.usersService.search(query);
+	}
+
 	// Gestion de son propre compte
 	@Get("me")
 	@UseGuards(AuthGuard)

backend/src/users/users.service.ts

@@ -106,6 +106,16 @@ export class UsersService {
 		};
 	}
 
+	async search(query: string) {
+		const users = await this.usersRepository.search(query);
+		return users.map((user) => ({
+			...user,
+			avatarUrl: user.avatarUrl
+				? this.s3Service.getPublicUrl(user.avatarUrl)
+				: null,
+		}));
+	}
+
 	async findOne(uuid: string) {
 		const user = await this.usersRepository.findOne(uuid);
 		if (!user) return null;

frontend/src/services/user.service.ts

@@ -12,6 +12,13 @@ export const UserService = {
 		return data;
 	},
 
+	async search(query: string): Promise<User[]> {
+		const { data } = await api.get<User[]>("/users/search", {
+			params: { q: query },
+		});
+		return data;
+	},
+
 	async updateMe(update: Partial<User>): Promise<User> {
 		const { data } = await api.patch<User>("/users/me", update);
 		return data;