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/server/routers/user.ts

@@ -78,10 +78,11 @@ export const userRouter = router({
         bio: z.string().max(1000).optional(),
         phoneNumber: z.string().max(20).optional().nullable(),
         notificationPreference: z.enum(['EMAIL', 'WHATSAPP', 'BOTH', 'NONE']).optional(),
+        expertiseTags: z.array(z.string()).max(15).optional(),
       })
     )
     .mutation(async ({ ctx, input }) => {
-      const { bio, ...directFields } = input
+      const { bio, expertiseTags, ...directFields } = input
 
       // If bio is provided, merge it into metadataJson
       let metadataJson: Prisma.InputJsonValue | undefined
@@ -99,6 +100,7 @@ export const userRouter = router({
         data: {
           ...directFields,
           ...(metadataJson !== undefined && { metadataJson }),
+          ...(expertiseTags !== undefined && { expertiseTags }),
         },
       })
     }),
@@ -241,14 +243,22 @@ export const userRouter = router({
   get: adminProcedure
     .input(z.object({ id: z.string() }))
     .query(async ({ ctx, input }) => {
-      return ctx.prisma.user.findUniqueOrThrow({
-        where: { id: input.id },
-        include: {
-          _count: {
-            select: { assignments: true, mentorAssignments: true },
+      console.log('[user.get] Fetching user:', input.id)
+      try {
+        const user = await ctx.prisma.user.findUniqueOrThrow({
+          where: { id: input.id },
+          include: {
+            _count: {
+              select: { assignments: true, mentorAssignments: true },
+            },
           },
-        },
-      })
+        })
+        console.log('[user.get] Found user:', user.email)
+        return user
+      } catch (error) {
+        console.error('[user.get] Error fetching user:', input.id, error)
+        throw error
+      }
     }),
 
   /**