Add gender requirement (آقا/خانم/فرقی نمی‌کند) + employee (کارجو) panel

- Gender enum + GenderRequirement on Shift/JobOpening + Gender on UserPreferences (migration)
- Employer PostShift/PostJob + admin Review have a gender select; parser detects آقا/خانم/مرد/زن
- Gender badge on cards + detail; gender filter on Shifts/Jobs; gender in preferences
- Recommendations exclude listings whose gender requirement conflicts with the person's gender
- Two panels: new /Me employee (کارجو) panel (recommendations + saved + applied + prefs) alongside /Employer; nav routes by role; /Account/Profile → /Me

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

src/JobsMedical.Web/Pages/Preferences/Index.cshtml

@@ -35,6 +35,15 @@
             </select>
         </div>
 
+        <div class="filter-group">
+            <label>جنسیت شما</label>
+            <select name="Gender">
+                <option value="0" selected="@(Model.Gender == JobsMedical.Web.Models.Gender.Any)">نمی‌خواهم بگویم</option>
+                <option value="1" selected="@(Model.Gender == JobsMedical.Web.Models.Gender.Male)">آقا</option>
+                <option value="2" selected="@(Model.Gender == JobsMedical.Web.Models.Gender.Female)">خانم</option>
+            </select>
+            <p class="muted" style="font-size:12px; margin:4px 0 0;">برای حذف آگهی‌هایی که با جنسیت شما هم‌خوان نیستند.</p>
+        </div>
         <div class="filter-group">
             <label>نوع شیفت ترجیحی</label>
             <select name="PreferredShiftType">

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

@@ -25,6 +25,7 @@ public class IndexModel : PageModel
     [BindProperty] public int? CityId { get; set; }
     [BindProperty] public ShiftType? PreferredShiftType { get; set; }
     [BindProperty] public long? MinPay { get; set; }
+    [BindProperty] public Gender Gender { get; set; }
 
     public bool Saved { get; private set; }
 
@@ -38,12 +39,13 @@ public class IndexModel : PageModel
             CityId = prefs.CityId;
             PreferredShiftType = prefs.PreferredShiftType;
             MinPay = prefs.MinPay;
+            Gender = prefs.Gender;
         }
     }
 
     public async Task<IActionResult> OnPostAsync()
     {
-        await _interest.SavePreferencesAsync(RoleId, CityId, PreferredShiftType, MinPay);
+        await _interest.SavePreferencesAsync(RoleId, CityId, PreferredShiftType, MinPay, Gender);
         // Back to home so the personalized feed is the immediate payoff.
         TempData["prefsSaved"] = true;
         return RedirectToPage("/Index");