[Map] Render real Neshan map on shift/job detail pages

The detail pages showed a 'map coming later' placeholder. Add a read-only Neshan web map (Leaflet SDK) showing the facility marker when NeshanMapKey is set, plus a 'مسیریابی در نشان' directions link; falls back to coordinates when no key. New _NeshanMap shared partial loads the SDK and inits #facmap. Shift/Job Details models now expose MapKey via SettingsService. Coordinates are emitted with InvariantCulture so the decimal point/digits don't break JS. The facility registration picker already used Neshan; this reuses the same key.

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

src/JobsMedical.Web/Pages/Jobs/Details.cshtml.cs

@@ -11,14 +11,18 @@ public class DetailsModel : PageModel
 {
     private readonly AppDbContext _db;
     private readonly InterestService _interest;
+    private readonly JobsMedical.Web.Services.Scraping.SettingsService _settings;
 
-    public DetailsModel(AppDbContext db, InterestService interest)
+    public DetailsModel(AppDbContext db, InterestService interest,
+        JobsMedical.Web.Services.Scraping.SettingsService settings)
     {
         _db = db;
         _interest = interest;
+        _settings = settings;
     }
 
     public JobOpening? Job { get; private set; }
+    public string? MapKey { get; private set; }
     public bool ShowContact { get; private set; }
     public bool Saved { get; private set; }
     public bool Reported { get; private set; }
@@ -27,6 +31,7 @@ public class DetailsModel : PageModel
     {
         await LoadAsync(id);
         if (Job is null) return NotFound();
+        MapKey = (await _settings.GetAsync()).NeshanMapKey;
         Reported = Request.Query["reported"] == "1";
         await _interest.LogJobAsync(InterestEventType.View, id);
         return Page();