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/Shared/_ShiftCard.cshtml

@@ -18,6 +18,10 @@
         {
             <span class="badge badge-type">@Model.Role.Name</span>
         }
+        @if (Model.GenderRequirement != Gender.Any)
+        {
+            <span class="badge badge-gender">@JalaliDate.GenderLabel(Model.GenderRequirement)</span>
+        }
         <span>📍 @Model.Facility?.City?.Name@(Model.Facility?.District is not null ? "، " + Model.Facility.District.Name : "")</span>
         @if (Model.Facility?.IsVerified == true)
         {