Fix FK violation when publishing a crawled listing without a facility

OnPostPublishAsync inserted a Shift/Job with FacilityId=0 when no
facility was selected (e.g. the dropdown is empty because no facilities
exist yet), throwing FK_Shifts_Facilities_FacilityId and surfacing the
production error page.

- Resolve-or-create the facility before insert: use the picked one, else
  create an unverified Facility from a typed name (reusing same-named).
- Guard the role too; on missing facility/role redirect back with a
  Persian error message instead of 500.
- Review form: add "new facility name" input + "— none —" option +
  error alert; add .alert-error style.

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

src/JobsMedical.Web/Pages/Admin/Review.cshtml

@@ -10,6 +10,10 @@
 </div>
 
 <div class="container section">
+    @if (Model.Error is not null)
+    {
+        <div class="alert alert-error" style="margin-bottom:16px;">⚠ @Model.Error</div>
+    }
     <div class="detail-grid">
         <div>
             <div class="card card-pad">
@@ -47,11 +51,14 @@
                 <div class="filter-group">
                     <label>مرکز درمانی</label>
                     <select name="FacilityId">
+                        <option value="0">— انتخاب نشده —</option>
                         @foreach (var f in Model.Facilities)
                         {
                             <option value="@f.Id">@f.Name — @f.City?.Name</option>
                         }
                     </select>
+                    <input type="text" name="NewFacilityName" placeholder="یا نام مرکز جدید را وارد کن…" style="margin-top:6px;" />
+                    <p class="muted" style="font-size:11px; margin:4px 0 0;">اگر مرکز در فهرست نیست، نامش را اینجا بنویس تا به‌صورت «تأییدنشده» ساخته شود.</p>
                 </div>
                 <div class="filter-group">
                     <label>نقش</label>

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

@@ -27,9 +27,12 @@ public class ReviewModel : PageModel
     public List<Facility> Facilities { get; private set; } = new();
     public List<Role> Roles { get; private set; } = new();
 
+    [TempData] public string? Error { get; set; }
+
     // The editable form (prefilled from the parser, admin can override everything).
     [BindProperty] public ListingKind Kind { get; set; }
     [BindProperty] public int FacilityId { get; set; }
+    [BindProperty] public string? NewFacilityName { get; set; }   // create a facility on the fly if none picked
     [BindProperty] public int RoleId { get; set; }
     [BindProperty] public string? Description { get; set; }
     // Shift fields
@@ -77,6 +80,21 @@ public class ReviewModel : PageModel
         Raw = await _db.RawListings.FirstOrDefaultAsync(r => r.Id == id);
         if (Raw is null) return NotFound();
 
+        // Resolve the facility: prefer the picked one; otherwise create from the typed name.
+        // This prevents FK_Shifts_Facilities_FacilityId violations when no facility is selected
+        // (e.g. the dropdown is empty because no facilities exist yet).
+        var facilityId = await ResolveFacilityIdAsync();
+        if (facilityId is null)
+        {
+            Error = "یک مرکز درمانی معتبر انتخاب کن، یا در کادر «نام مرکز جدید» نام مرکز را وارد کن تا ساخته شود.";
+            return RedirectToPage(new { id });
+        }
+        if (!await _db.Roles.AnyAsync(r => r.Id == RoleId))
+        {
+            Error = "یک نقش معتبر انتخاب کن.";
+            return RedirectToPage(new { id });
+        }
+
         Shift? createdShift = null;
         JobOpening? createdJob = null;
         if (Kind == ListingKind.Shift)
@@ -84,7 +102,7 @@ public class ReviewModel : PageModel
             var role = await _db.Roles.FindAsync(RoleId);
             var shift = new Shift
             {
-                FacilityId = FacilityId,
+                FacilityId = facilityId.Value,
                 RoleId = RoleId,
                 Date = ShiftDate,
                 StartTime = StartTime,
@@ -111,7 +129,7 @@ public class ReviewModel : PageModel
         {
             var job = new JobOpening
             {
-                FacilityId = FacilityId,
+                FacilityId = facilityId.Value,
                 RoleId = RoleId,
                 Title = string.IsNullOrWhiteSpace(Title) ? "موقعیت استخدامی" : Title.Trim(),
                 EmploymentType = EmploymentType,
@@ -150,6 +168,41 @@ public class ReviewModel : PageModel
         _ => (new TimeOnly(8, 0), new TimeOnly(8, 0)),
     };
 
+    /// <summary>
+    /// Returns a valid existing FacilityId, creating a new unverified facility from
+    /// <see cref="NewFacilityName"/> when nothing valid is selected. Returns null when
+    /// neither a valid facility is picked nor a name is provided.
+    /// </summary>
+    private async Task<int?> ResolveFacilityIdAsync()
+    {
+        if (FacilityId > 0 && await _db.Facilities.AnyAsync(f => f.Id == FacilityId))
+            return FacilityId;
+
+        if (string.IsNullOrWhiteSpace(NewFacilityName))
+            return null;
+
+        // Reuse a same-named facility if one already exists, else create it.
+        var name = NewFacilityName.Trim();
+        var existing = await _db.Facilities.FirstOrDefaultAsync(f => f.Name == name);
+        if (existing is not null) return existing.Id;
+
+        var cityId = await _db.Cities.OrderByDescending(c => c.IsActive)
+            .Select(c => (int?)c.Id).FirstOrDefaultAsync();
+        if (cityId is null) return null;   // no cities seeded — cannot create a facility
+
+        var facility = new Facility
+        {
+            Name = name,
+            CityId = cityId.Value,
+            Type = FacilityType.Hospital,
+            Verification = VerificationStatus.Unverified,
+            IsVerified = false,
+        };
+        _db.Facilities.Add(facility);
+        await _db.SaveChangesAsync();
+        return facility.Id;
+    }
+
     private async Task LoadListsAsync()
     {
         Facilities = await _db.Facilities.Include(f => f.City).OrderBy(f => f.Name).ToListAsync();

src/JobsMedical.Web/wwwroot/css/site.css

@@ -399,6 +399,7 @@ label { font-size: 13px; }
 .legal li { margin-bottom: 6px; }
 .alert { padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; font-weight: 600; }
 .alert-success { background: var(--primary-soft); color: var(--primary-dark); }
+.alert-error { background: #fdecea; color: #b3261e; border: 1px solid #f5c2c0; }
 
 /* notification bell badge */
 .bell-badge { position:absolute; top:-6px; inset-inline-start:-8px; background:var(--accent); color:#fff;