feat(admin): edit any user's full profile (PATCH/POST /v1/users/{id} admin + UI modal)

Identity: admin-only PATCH /v1/users/{id} (reuses UpdateMeAsync) + POST {id}/avatar.
Admin Users panel: «پروفایل» modal to view/edit name/slogan/about/company/website/
country/national-code/birthdate/gender/avatar for any user. Verified admin→other-user edit.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/identity/FlatRender.IdentitySvc/Controllers/UsersController.cs

@@ -49,6 +49,21 @@ public class UsersController(IUserService userService) : ControllerBase
         [FromQuery] int pageSize = 20)
         => Ok(await userService.SearchAsync(q, tenantId, page, pageSize));
 
+    [HttpPatch("{userId:guid}")]
+    [Authorize(Roles = "Admin")]
+    [ProducesResponseType(typeof(UserResponse), 200)]
+    [ProducesResponseType(404)]
+    public async Task<IActionResult> UpdateUser(Guid userId, [FromBody] UpdateUserRequest request)
+        => Ok(await userService.UpdateMeAsync(userId, request));
+
+    [HttpPost("{userId:guid}/avatar")]
+    [Authorize(Roles = "Admin")]
+    public async Task<IActionResult> SetUserAvatar(Guid userId, [FromBody] SetAvatarRequest request)
+    {
+        await userService.UpdateAvatarAsync(userId, request.AvatarId, request.AvatarUrl);
+        return Ok();
+    }
+
     [HttpPost("{userId:guid}/ban")]
     [Authorize(Roles = "Admin")]
     [ProducesResponseType(204)]