[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/Shifts/Details.cshtml

@@ -143,11 +143,20 @@
                 <h3 style="margin-top:0;">موقعیت مکانی</h3>
                 @if (f.Lat is not null && f.Lng is not null)
                 {
-                    <div style="background:var(--primary-soft); border-radius:10px; height:170px; display:grid; place-items:center; color:var(--primary-dark); text-align:center; padding:10px;">
-                        🗺️<br />نقشه نشان/بلد<br />
-                        <small class="muted">@f.Lat، @f.Lng</small>
-                    </div>
-                    <p class="muted" style="font-size:12px; margin-bottom:0;">نقشه تعاملی در فاز بعد اضافه می‌شود (Neshan/Balad).</p>
+                    var latS = f.Lat.Value.ToString(System.Globalization.CultureInfo.InvariantCulture);
+                    var lngS = f.Lng.Value.ToString(System.Globalization.CultureInfo.InvariantCulture);
+                    @if (!string.IsNullOrEmpty(Model.MapKey))
+                    {
+                        <div id="facmap" data-lat="@latS" data-lng="@lngS" style="height:200px; border-radius:10px; overflow:hidden; border:1px solid var(--line);"></div>
+                    }
+                    else
+                    {
+                        <div style="background:var(--primary-soft); border-radius:10px; height:140px; display:grid; place-items:center; color:var(--primary-dark); text-align:center; padding:10px;">
+                            🗺️<br /><small class="muted" dir="ltr">@latS، @lngS</small>
+                        </div>
+                    }
+                    <a class="btn btn-outline btn-block" style="margin-top:8px;" target="_blank" rel="noopener"
+                       href="https://neshan.org/maps/@(latS),@(lngS),16z">مسیریابی در نشان</a>
                 }
                 else
                 {
@@ -157,3 +166,8 @@
         </aside>
     </div>
 </div>
+
+@if (!string.IsNullOrEmpty(Model.MapKey) && Model.Shift?.Facility?.Lat is not null)
+{
+    <partial name="_NeshanMap" model="Model.MapKey" />
+}