Decouple projects from rounds with RoundProject join table

Projects now exist at the program level instead of being locked to a
single round. A new RoundProject join table enables many-to-many
relationships with per-round status tracking. Rounds have sortOrder
for configurable progression paths.

- Add RoundProject model, programId on Project, sortOrder on Round
- Migration preserves existing data (roundId -> RoundProject entries)
- Update all routers to query through RoundProject join
- Add assign/remove/advance/reorder round endpoints
- Add Assign, Advance, Remove Projects dialogs on round detail page
- Add round reorder controls (up/down arrows) on rounds list
- Show all rounds on project detail page

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

src/app/(public)/my-submission/[id]/submission-detail-client.tsx

@@ -132,7 +132,7 @@ export function SubmissionDetailClient() {
             </Badge>
           </div>
           <p className="text-muted-foreground">
-            {project.round.program.year} Edition - {project.round.name}
+            {project.roundProjects?.[0]?.round?.program?.year ? `${project.roundProjects[0].round.program.year} Edition` : ''}{project.roundProjects?.[0]?.round?.name ? ` - ${project.roundProjects[0].round.name}` : ''}
           </p>
         </div>
       </div>

src/app/(public)/my-submission/my-submission-client.tsx

@@ -131,18 +131,24 @@ export function MySubmissionClient() {
         </Card>
       ) : (
         <div className="space-y-4">
-          {submissions.map((project) => (
+          {submissions.map((project) => {
+            const latestRoundProject = project.roundProjects?.[0]
+            const projectStatus = latestRoundProject?.status ?? 'SUBMITTED'
+            const roundName = latestRoundProject?.round?.name
+            const programYear = latestRoundProject?.round?.program?.year
+
+            return (
             <Card key={project.id}>
               <CardHeader className="pb-3">
                 <div className="flex items-start justify-between">
                   <div>
                     <CardTitle className="text-lg">{project.title}</CardTitle>
                     <CardDescription>
-                      {project.round.program.year} Edition - {project.round.name}
+                      {programYear ? `${programYear} Edition` : ''}{roundName ? ` - ${roundName}` : ''}
                     </CardDescription>
                   </div>
-                  <Badge variant={statusColors[project.status] || 'secondary'}>
-                    {project.status.replace('_', ' ')}
+                  <Badge variant={statusColors[projectStatus] || 'secondary'}>
+                    {projectStatus.replace('_', ' ')}
                   </Badge>
                 </div>
               </CardHeader>
@@ -197,22 +203,22 @@ export function MySubmissionClient() {
                           status: 'UNDER_REVIEW',
                           label: 'Under Review',
                           date: null,
-                          completed: ['UNDER_REVIEW', 'SEMIFINALIST', 'FINALIST', 'WINNER'].includes(project.status),
+                          completed: ['UNDER_REVIEW', 'SEMIFINALIST', 'FINALIST', 'WINNER'].includes(projectStatus),
                         },
                         {
                           status: 'SEMIFINALIST',
                           label: 'Semi-finalist',
                           date: null,
-                          completed: ['SEMIFINALIST', 'FINALIST', 'WINNER'].includes(project.status),
+                          completed: ['SEMIFINALIST', 'FINALIST', 'WINNER'].includes(projectStatus),
                         },
                         {
                           status: 'FINALIST',
                           label: 'Finalist',
                           date: null,
-                          completed: ['FINALIST', 'WINNER'].includes(project.status),
+                          completed: ['FINALIST', 'WINNER'].includes(projectStatus),
                         },
                       ]}
-                      currentStatus={project.status}
+                      currentStatus={projectStatus}
                       className="mt-4"
                     />
                   </div>
@@ -229,7 +235,8 @@ export function MySubmissionClient() {
                 </div>
               </CardContent>
             </Card>
-          ))}
+            )
+          })}
         </div>
       )}
     </div>