Add pagination to the Jobs / Shifts / Talent list pages

The list pages loaded EVERY matching listing into one page (/Jobs was a ~2.6MB page with 1000+
cards) — no pagination at all. Add server-side paging (24/page, DB Skip/Take; near-me still sorts
all by distance then paginates in memory). The header count now shows the true total, and a shared
_Pager partial renders prev/next + a windowed page list that preserves all active filters in the URL.

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

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

@@ -17,6 +17,11 @@ public class IndexModel : PageModel
     [BindProperty(SupportsGet = true)] public int? RoleId { get; set; }
     [BindProperty(SupportsGet = true)] public Gender? GenderFilter { get; set; }
     [BindProperty(SupportsGet = true)] public string? Q { get; set; }   // deep search
+    [BindProperty(SupportsGet = true)] public int Page { get; set; } = 1;
+    private const int PageSize = 24;
+    public int TotalCount { get; private set; }
+    public int TotalPages { get; private set; }
+    public int CurrentPage { get; private set; }
 
     public List<TalentListing> Results { get; private set; } = new();
     public List<City> Cities { get; private set; } = new();
@@ -60,7 +65,11 @@ public class IndexModel : PageModel
                     EF.Functions.ILike(t.City.Name, like));
             }
 
-        Results = await q.OrderByDescending(t => t.CreatedAt).ToListAsync();
+        TotalCount = await q.CountAsync();
+        TotalPages = Math.Max(1, (int)Math.Ceiling(TotalCount / (double)PageSize));
+        CurrentPage = Math.Clamp(Page, 1, TotalPages);
+        Results = await q.OrderByDescending(t => t.CreatedAt)
+                         .Skip((CurrentPage - 1) * PageSize).Take(PageSize).ToListAsync();
 
         var role = Roles.FirstOrDefault(r => r.Id == RoleId)?.Name;
         var city = Cities.FirstOrDefault(c => c.Id == CityId)?.Name;