Add unified expertise tag system and round entry notifications

- ExpertiseSelect now fetches tags from database with category grouping
- Tags set by admin during invitation are locked and cannot be removed
- Onboarding merges user-selected tags with admin-preset tags
- MENTOR role now goes through onboarding flow
- Added migration for Round.entryNotificationType column
- Added seed script with ~90 comprehensive expertise tags

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

src/app/(auth)/onboarding/page.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useState, useMemo } from 'react'
+import { useState, useMemo, useEffect } from 'react'
 import { useRouter } from 'next/navigation'
 import { trpc } from '@/lib/trpc/client'
 import { Button } from '@/components/ui/button'
@@ -39,15 +39,44 @@ type Step = 'name' | 'phone' | 'tags' | 'preferences' | 'complete'
 export default function OnboardingPage() {
   const router = useRouter()
   const [step, setStep] = useState<Step>('name')
+  const [initialized, setInitialized] = useState(false)
 
   // Form state
   const [name, setName] = useState('')
   const [phoneNumber, setPhoneNumber] = useState('')
   const [expertiseTags, setExpertiseTags] = useState<string[]>([])
+  const [lockedTags, setLockedTags] = useState<string[]>([])
   const [notificationPreference, setNotificationPreference] = useState<
     'EMAIL' | 'WHATSAPP' | 'BOTH' | 'NONE'
   >('EMAIL')
 
+  // Fetch current user data to get admin-preset tags
+  const { data: userData, isLoading: userLoading } = trpc.user.me.useQuery()
+
+  // Initialize form with user data
+  useEffect(() => {
+    if (userData && !initialized) {
+      // Pre-fill name if available
+      if (userData.name) {
+        setName(userData.name)
+      }
+      // Pre-fill phone if available
+      if (userData.phoneNumber) {
+        setPhoneNumber(userData.phoneNumber)
+      }
+      // Set admin-preset tags as both locked and selected
+      if (userData.expertiseTags && userData.expertiseTags.length > 0) {
+        setLockedTags(userData.expertiseTags)
+        setExpertiseTags(userData.expertiseTags)
+      }
+      // Pre-fill notification preference if available
+      if (userData.notificationPreference) {
+        setNotificationPreference(userData.notificationPreference)
+      }
+      setInitialized(true)
+    }
+  }, [userData, initialized])
+
   // Fetch feature flags
   const { data: featureFlags } = trpc.settings.getFeatureFlags.useQuery()
   const whatsappEnabled = featureFlags?.whatsappEnabled ?? false
@@ -95,15 +124,36 @@ export default function OnboardingPage() {
       setStep('complete')
       toast.success('Welcome to MOPC!')
 
-      // Redirect after a short delay
+      // Redirect after a short delay based on user role
       setTimeout(() => {
-        router.push('/jury')
+        const role = userData?.role
+        if (role === 'MENTOR') {
+          router.push('/mentor')
+        } else if (role === 'OBSERVER') {
+          router.push('/observer')
+        } else {
+          router.push('/jury')
+        }
       }, 2000)
     } catch (error) {
       toast.error(error instanceof Error ? error.message : 'Failed to complete onboarding')
     }
   }
 
+  // Show loading while fetching user data
+  if (userLoading || !initialized) {
+    return (
+      <div className="absolute inset-0 -m-4 flex items-center justify-center p-4 md:p-8 bg-gradient-to-br from-[#053d57] to-[#557f8c]">
+        <Card className="w-full max-w-lg shadow-2xl">
+          <CardContent className="flex flex-col items-center justify-center py-12">
+            <Loader2 className="h-8 w-8 animate-spin text-primary mb-4" />
+            <p className="text-muted-foreground">Loading your profile...</p>
+          </CardContent>
+        </Card>
+      </div>
+    )
+  }
+
   return (
     <div className="absolute inset-0 -m-4 flex items-center justify-center p-4 md:p-8 bg-gradient-to-br from-[#053d57] to-[#557f8c]">
       <Card className="w-full max-w-lg max-h-[85vh] overflow-y-auto shadow-2xl">
@@ -219,6 +269,7 @@ export default function OnboardingPage() {
                 value={expertiseTags}
                 onChange={setExpertiseTags}
                 maxTags={5}
+                lockedTags={lockedTags}
               />
 
               <div className="flex gap-2">