Warn when jurors lack profile data in AI assignment preview

Shows warning with juror names when they have no expertise tags or bio,
so admin can ask them to onboard before committing assignments.

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

src/server/routers/roundAssignment.ts

@@ -190,9 +190,21 @@ export const roundAssignmentRouter = router({
 
       const assignedProjectIds = new Set(assignments.map((a) => a.projectId))
 
+      // Warn about jurors without profile data
+      const warnings: string[] = result.error ? [result.error] : []
+      const incompleteJurors = jurors.filter(
+        (j) => (!j.expertiseTags || j.expertiseTags.length === 0) && !j.bio
+      )
+      if (incompleteJurors.length > 0) {
+        const names = incompleteJurors.map((j) => j.name || 'Unknown').join(', ')
+        warnings.push(
+          `${incompleteJurors.length} juror(s) have no expertise tags or bio (${names}). Their assignments are based on workload balance only — consider asking them to complete their profile first.`
+        )
+      }
+
       return {
         assignments,
-        warnings: result.error ? [result.error] : [],
+        warnings,
         stats: {
           totalProjects: projects.length,
           totalJurors: jurors.length,