[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/Shared/_NeshanMap.cshtml

@@ -0,0 +1,21 @@
+@model string
+@*
+    Read-only Neshan map. Render once per page AFTER an element <div id="facmap"
+    data-lat="…" data-lng="…"> exists. Pass the Neshan web key as the model.
+    The SDK is a synchronous script, so the init below runs once L is defined.
+*@
+<link rel="stylesheet" href="https://static.neshan.org/sdk/leaflet/1.4.0/neshan-sdk/v1.0.8/index.css" />
+<script src="https://static.neshan.org/sdk/leaflet/1.4.0/neshan-sdk/v1.0.8/index.js"></script>
+<script>
+    (function () {
+        var el = document.getElementById('facmap');
+        if (!el || !window.L) return;
+        var lat = parseFloat(el.dataset.lat), lng = parseFloat(el.dataset.lng);
+        if (isNaN(lat) || isNaN(lng)) return;
+        var map = new L.Map('facmap', {
+            key: '@Model', maptype: 'neshan', poi: true, traffic: false,
+            center: [lat, lng], zoom: 15
+        });
+        L.marker([lat, lng]).addTo(map);
+    })();
+</script>