Add special awards management features and fix voting/assignment issues

Special Awards:
- Add delete button with confirmation dialog to award detail page
- Add voting window dates (start/end) to award edit page
- Add manual project eligibility management (add/remove projects)
- Show eligibility method (Auto/Manual) in eligibility table
- Auto-set votingStartAt when opening voting if date is in future

Assignment Suggestions:
- Replace toggle with proper tabs UI (Algorithm vs AI Powered)
- Persist AI suggestions when navigating away (stored in database)
- Show suggestion counts on tab badges
- Independent refresh/start buttons per tab

Round Voting:
- Auto-update votingStartAt to now when activating round if date is in future
- Fixes issue where round was opened but voting dates were in future

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

src/server/routers/specialAward.ts

@@ -195,12 +195,28 @@ export const specialAwardRouter = router({
     .mutation(async ({ ctx, input }) => {
       const current = await ctx.prisma.specialAward.findUniqueOrThrow({
         where: { id: input.id },
-        select: { status: true },
+        select: { status: true, votingStartAt: true, votingEndAt: true },
       })
 
+      const now = new Date()
+
+      // When opening voting, auto-set votingStartAt to now if it's in the future or not set
+      let votingStartAtUpdated = false
+      const updateData: Parameters<typeof ctx.prisma.specialAward.update>[0]['data'] = {
+        status: input.status,
+      }
+
+      if (input.status === 'VOTING_OPEN' && current.status !== 'VOTING_OPEN') {
+        // If no voting start date, or if it's in the future, set it to now
+        if (!current.votingStartAt || current.votingStartAt > now) {
+          updateData.votingStartAt = now
+          votingStartAtUpdated = true
+        }
+      }
+
       const award = await ctx.prisma.specialAward.update({
         where: { id: input.id },
-        data: { status: input.status },
+        data: updateData,
       })
 
       await logAudit({
@@ -211,6 +227,11 @@ export const specialAwardRouter = router({
         detailsJson: {
           previousStatus: current.status,
           newStatus: input.status,
+          ...(votingStartAtUpdated && {
+            votingStartAtUpdated: true,
+            previousVotingStartAt: current.votingStartAt,
+            newVotingStartAt: now,
+          }),
         },
       })