fix: avatar/logo display diagnostics and upload error handling

Add error logging to silent catch blocks in avatar/logo URL generation,
show user avatar on admin member detail page, and surface specific error
messages for upload failures (CORS/network issues) instead of generic errors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server/routers/user.ts

@@ -5,7 +5,7 @@ import { UserRole } from '@prisma/client'
 import { router, protectedProcedure, adminProcedure, superAdminProcedure, publicProcedure } from '../trpc'
 import { sendInvitationEmail, sendMagicLinkEmail } from '@/lib/email'
 import { hashPassword, validatePassword } from '@/lib/password'
-import { attachAvatarUrls } from '@/server/utils/avatar-url'
+import { attachAvatarUrls, getUserAvatarUrl } from '@/server/utils/avatar-url'
 import { logAudit } from '@/server/utils/audit'
 import { generateInviteToken, getInviteExpiryHours, getInviteExpiryMs } from '@/server/utils/invite'
 
@@ -353,7 +353,8 @@ export const userRouter = router({
           },
         },
       })
-      return user
+      const avatarUrl = await getUserAvatarUrl(user.profileImageKey, user.profileImageProvider)
+      return { ...user, avatarUrl }
     }),
 
   /**