Add AI Tags button to admin projects page

Adds a new "AI Tags" button that opens a dialog to batch-generate
expertise tags using AI for all untagged projects in a selected round.

The feature uses the existing tag.batchTagProjects endpoint which:
- Only processes projects without existing tags
- Preserves any manually added tags
- Logs AI usage for cost tracking

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

src/app/(admin)/admin/projects/page.tsx

@@ -52,7 +52,16 @@ import {
   Search,
   Trash2,
   Loader2,
+  Sparkles,
 } from 'lucide-react'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select'
+import { Label } from '@/components/ui/label'
 import { truncate } from '@/lib/utils'
 import { ProjectLogo } from '@/components/shared/project-logo'
 import { Pagination } from '@/components/shared/pagination'
@@ -230,6 +239,30 @@ export default function ProjectsPage() {
 
   const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
   const [projectToDelete, setProjectToDelete] = useState<{ id: string; title: string } | null>(null)
+  const [aiTagDialogOpen, setAiTagDialogOpen] = useState(false)
+  const [selectedRoundForTagging, setSelectedRoundForTagging] = useState<string>('')
+
+  // Fetch rounds for the AI tagging dialog
+  const { data: programs } = trpc.program.list.useQuery()
+  const { data: allRounds } = trpc.round.list.useQuery(
+    { programId: programs?.[0]?.id ?? '' },
+    { enabled: !!programs?.[0]?.id }
+  )
+
+  // AI batch tagging mutation
+  const batchTagProjects = trpc.tag.batchTagProjects.useMutation({
+    onSuccess: (result) => {
+      toast.success(
+        `AI Tagging complete: ${result.processed} tagged, ${result.skipped} skipped, ${result.failed} failed`
+      )
+      setAiTagDialogOpen(false)
+      setSelectedRoundForTagging('')
+      utils.project.list.invalidate()
+    },
+    onError: (error) => {
+      toast.error(error.message || 'Failed to generate AI tags')
+    },
+  })
 
   const deleteProject = trpc.project.delete.useMutation({
     onSuccess: () => {
@@ -259,6 +292,10 @@ export default function ProjectsPage() {
           </p>
         </div>
         <div className="flex gap-2">
+          <Button variant="outline" onClick={() => setAiTagDialogOpen(true)}>
+            <Sparkles className="mr-2 h-4 w-4" />
+            AI Tags
+          </Button>
           <Button variant="outline" asChild>
             <Link href="/admin/projects/import">
               <FileUp className="mr-2 h-4 w-4" />
@@ -547,6 +584,63 @@ export default function ProjectsPage() {
           </AlertDialogFooter>
         </AlertDialogContent>
       </AlertDialog>
+
+      {/* AI Tagging Dialog */}
+      <AlertDialog open={aiTagDialogOpen} onOpenChange={setAiTagDialogOpen}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle className="flex items-center gap-2">
+              <Sparkles className="h-5 w-5" />
+              Generate AI Tags
+            </AlertDialogTitle>
+            <AlertDialogDescription>
+              Use AI to automatically generate expertise tags for all projects in a round
+              that don&apos;t have tags yet. This helps with jury matching and filtering.
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="space-y-2">
+              <Label htmlFor="round-select">Select Round</Label>
+              <Select
+                value={selectedRoundForTagging}
+                onValueChange={setSelectedRoundForTagging}
+              >
+                <SelectTrigger id="round-select">
+                  <SelectValue placeholder="Choose a round..." />
+                </SelectTrigger>
+                <SelectContent>
+                  {filterOptions?.rounds?.map((round) => (
+                    <SelectItem key={round.id} value={round.id}>
+                      {round.name} ({round.program?.name})
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+            <p className="text-sm text-muted-foreground">
+              Only projects without existing tags will be processed. Existing tags are preserved.
+            </p>
+          </div>
+          <AlertDialogFooter>
+            <AlertDialogCancel>Cancel</AlertDialogCancel>
+            <AlertDialogAction
+              onClick={() => {
+                if (selectedRoundForTagging) {
+                  batchTagProjects.mutate({ roundId: selectedRoundForTagging })
+                }
+              }}
+              disabled={!selectedRoundForTagging || batchTagProjects.isPending}
+            >
+              {batchTagProjects.isPending ? (
+                <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+              ) : (
+                <Sparkles className="mr-2 h-4 w-4" />
+              )}
+              {batchTagProjects.isPending ? 'Processing...' : 'Generate Tags'}
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
     </div>
   )
 }