Redesign assignment preview with detailed editable juror-project view

Replace bare summary stats with full interactive assignment preview:
- Assignments grouped by juror with collapsible cards
- Per-assignment detail: match score, tags, reasoning, policy warnings
- Remove individual assignments with hover X button
- Inline add projects per juror + global juror/project picker
- No cap enforcement on manual adds (admin override)
- Track manual additions and removals with badge indicators
- Include user details in round.getById jury group members query

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

src/server/routers/round.ts

@@ -99,7 +99,13 @@ export const roundRouter = router({
         where: { id: input.id },
         include: {
           juryGroup: {
-            include: { members: true },
+            include: {
+              members: {
+                include: {
+                  user: { select: { id: true, name: true, email: true } },
+                },
+              },
+            },
           },
           submissionWindow: {
             include: { fileRequirements: true },