fix: group project files by round in admin project detail

- Sort files by round sortOrder first (via requirement.round.sortOrder)
- Admin project detail now uses grouped file view with round headers
- Files without a round requirement appear under "General" group

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

src/app/(admin)/admin/projects/[id]/page.tsx

@@ -816,16 +816,18 @@ function ProjectDetailContent({ projectId }: { projectId: string }) {
             />
           </div>
 
-          {/* All Files list */}
+          {/* All Files list — grouped by round */}
           {files && files.length > 0 && (
             <>
               <Separator />
               <FileViewer
                 projectId={projectId}
-                files={files.map((f) => ({
+                groupedFiles={(() => {
+                  const groups = new Map<string, { roundId: string | null; roundName: string; sortOrder: number; files: typeof mappedFiles }>()
+                  const mappedFiles = files.map((f) => ({
                     id: f.id,
                     fileName: f.fileName,
-                  fileType: f.fileType,
+                    fileType: f.fileType as 'EXEC_SUMMARY' | 'PRESENTATION' | 'VIDEO' | 'OTHER' | 'BUSINESS_PLAN' | 'VIDEO_PITCH' | 'SUPPORTING_DOC',
                     mimeType: f.mimeType,
                     size: f.size,
                     bucket: f.bucket,
@@ -842,7 +844,20 @@ function ProjectDetailContent({ projectId }: { projectId: string }) {
                       description: f.requirement.description,
                       isRequired: f.requirement.isRequired,
                     } : null,
-                }))}
+                  }))
+                  for (const f of files) {
+                    const roundId = f.requirement?.roundId ?? null
+                    const roundName = f.requirement?.round?.name ?? 'General'
+                    const sortOrder = f.requirement?.round?.sortOrder ?? -1
+                    const key = roundId ?? '_general'
+                    if (!groups.has(key)) {
+                      groups.set(key, { roundId, roundName, sortOrder, files: [] })
+                    }
+                    const mapped = mappedFiles.find((m) => m.id === f.id)!
+                    groups.get(key)!.files.push(mapped)
+                  }
+                  return Array.from(groups.values())
+                })()}
               />
             </>
           )}

src/server/routers/file.ts

@@ -358,7 +358,11 @@ export const fileRouter = router({
             },
           },
         },
-        orderBy: [{ fileType: 'asc' }, { createdAt: 'asc' }],
+        orderBy: [
+          { requirement: { round: { sortOrder: 'asc' } } },
+          { fileType: 'asc' },
+          { createdAt: 'asc' },
+        ],
       })
     }),