Add user tag editing and improve member error display

- Display actual error message in member detail page instead of generic Member not found
- Add debug logging to user.get query to help diagnose issues
- Add expertise tags editing for users in profile settings page
- Update user.updateProfile mutation to accept expertiseTags

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(admin)/admin/members/[id]/page.tsx

@@ -50,7 +50,7 @@ export default function MemberDetailPage() {
   const router = useRouter()
   const userId = params.id as string
 
-  const { data: user, isLoading, refetch } = trpc.user.get.useQuery({ id: userId })
+  const { data: user, isLoading, error, refetch } = trpc.user.get.useQuery({ id: userId })
   const updateUser = trpc.user.update.useMutation()
   const sendInvitation = trpc.user.sendInvitation.useMutation()
 
@@ -121,14 +121,19 @@ export default function MemberDetailPage() {
     )
   }
 
-  if (!user) {
+  if (error || !user) {
     return (
       <div className="space-y-6">
         <Alert variant="destructive">
           <AlertCircle className="h-4 w-4" />
-          <AlertTitle>Member not found</AlertTitle>
+          <AlertTitle>Error Loading Member</AlertTitle>
           <AlertDescription>
-            The member you&apos;re looking for does not exist.
+            {error?.message || 'The member you\'re looking for does not exist.'}
+            {process.env.NODE_ENV === 'development' && (
+              <div className="mt-2 text-xs opacity-75">
+                User ID: {userId}
+              </div>
+            )}
           </AlertDescription>
         </Alert>
         <Button asChild>