Paginate the admin review queue (and flagged list)

The «صف بررسی» loaded every New/Flagged RawListing at once — endless scroll once a crawl fills
it. Page both at 20/row with «قبلی/بعدی» controls (independent q & f query params); the header
now shows the true totals, not the page size.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/JobsMedical.Web/Pages/Admin/Index.cshtml.cs

@@ -26,6 +26,13 @@ public class IndexModel : PageModel
 
     public List<RawListing> Queue { get; private set; } = new();
     public List<RawListing> Flagged { get; private set; } = new();
+    public const int PageSize = 20;
+    public int QueuePage { get; private set; } = 1;
+    public int QueueTotal { get; private set; }
+    public int FlaggedPage { get; private set; } = 1;
+    public int FlaggedTotal { get; private set; }
+    public int QueuePages => Math.Max(1, (int)Math.Ceiling(QueueTotal / (double)PageSize));
+    public int FlaggedPages => Math.Max(1, (int)Math.Ceiling(FlaggedTotal / (double)PageSize));
     public IReadOnlyList<string> SourceNames { get; private set; } = new List<string>();
     public int PublishedShifts { get; private set; }
     public int PublishedJobs { get; private set; }
@@ -36,7 +43,7 @@ public class IndexModel : PageModel
 
     [TempData] public string? IngestMessage { get; set; }
 
-    public async Task OnGetAsync() => await LoadAsync();
+    public async Task OnGetAsync(int q = 1, int f = 1) => await LoadAsync(q, f);
 
     public async Task<IActionResult> OnPostAddAsync()
     {
@@ -166,14 +173,21 @@ public class IndexModel : PageModel
         return RedirectToPage();
     }
 
-    private async Task LoadAsync()
+    private async Task LoadAsync(int q = 1, int f = 1)
     {
+        QueueTotal = await _db.RawListings.CountAsync(r => r.Status == RawListingStatus.New);
+        QueuePage = Math.Clamp(q, 1, QueuePages);
         Queue = await _db.RawListings
             .Where(r => r.Status == RawListingStatus.New)
-            .OrderByDescending(r => r.Confidence).ThenByDescending(r => r.FetchedAt).ToListAsync();
+            .OrderByDescending(r => r.Confidence).ThenByDescending(r => r.FetchedAt)
+            .Skip((QueuePage - 1) * PageSize).Take(PageSize).ToListAsync();
+
+        FlaggedTotal = await _db.RawListings.CountAsync(r => r.Status == RawListingStatus.Flagged);
+        FlaggedPage = Math.Clamp(f, 1, FlaggedPages);
         Flagged = await _db.RawListings
             .Where(r => r.Status == RawListingStatus.Flagged)
-            .OrderByDescending(r => r.FetchedAt).ToListAsync();
+            .OrderByDescending(r => r.FetchedAt)
+            .Skip((FlaggedPage - 1) * PageSize).Take(PageSize).ToListAsync();
         SourceNames = _ingest.SourceNames;
         PublishedShifts = await _db.Shifts.CountAsync(s => s.Source != ShiftSource.Direct);
         PublishedJobs = await _db.JobOpenings.CountAsync();