SEO polish: facility structured data + trim homepage description

- Add SeoJsonLd.MedicalOrganization (Hospital/MedicalClinic schema with address, geo coords, and
  aggregateRating) and emit it on facility detail pages — only for real named facilities (not the
  «نامشخص» placeholder) — so Google can show a rich place result. Facility pages previously had no
  JSON-LD at all.
- Trim the homepage meta description from 193 to ~135 chars so Google doesn''t truncate it.

(Shift-detail canonical was a non-issue: the layout correctly omits canonical only on noindex pages,
which is what the audited past shift was.)

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

src/JobsMedical.Web/Pages/Facilities/Details.cshtml

@@ -149,3 +149,12 @@
 {
     <partial name="_NeshanMap" model="Model.MapKey" />
 }
+
+@* Place/clinic structured data — only for a real named facility (not the «نامشخص» placeholder). *@
+@if (JobsMedical.Web.Services.SeoJsonLd.HasRealEmployer(f))
+{
+    var bu = $"{ViewContext.HttpContext.Request.Scheme}://{ViewContext.HttpContext.Request.Host}";
+    @Html.Raw("<script type=\"application/ld+json\">"
+        + JobsMedical.Web.Services.SeoJsonLd.MedicalOrganization(f, bu, Model.AvgRating, Model.RatingCount)
+        + "</script>")
+}

src/JobsMedical.Web/Pages/Index.cshtml

@@ -2,7 +2,7 @@
 @model IndexModel
 @{
     ViewData["Title"] = null; // use default site title for the home page (best for SEO)
-    ViewData["Description"] = "همکادر؛ سریع‌ترین راه برای کادر درمان (پزشک، پرستار، ماما، تکنسین) جهت یافتن شیفت و موقعیت استخدامی در بیمارستان‌ها و کلینیک‌های تهران. به‌جای گشتن در کانال‌های تلگرام و بله، همه فرصت‌ها یک‌جا.";
+    ViewData["Description"] = "یافتن شیفت و موقعیت استخدامی کادر درمان (پزشک، پرستار، ماما، تکنسین) در بیمارستان‌ها و کلینیک‌های تهران — همهٔ فرصت‌ها یک‌جا در همکادر.";
 }
 
 <section class="hero">

src/JobsMedical.Web/Services/SeoJsonLd.cs

@@ -100,6 +100,26 @@ public static class SeoJsonLd
         return Fix(JsonSerializer.Serialize(obj, Opts));
     }
 
+    /// <summary>schema.org structured data for a facility page — a Hospital/MedicalClinic with its
+    /// address, map coordinates, and aggregate review rating, so Google can show a rich place result.</summary>
+    public static string MedicalOrganization(Facility f, string baseUrl, double avgRating = 0, int ratingCount = 0)
+    {
+        var schemaType = f.Type == FacilityType.Hospital ? "Hospital" : "MedicalClinic";
+        var obj = new Dictionary<string, object?>
+        {
+            ["@context"] = "https://schema.org",
+            ["@type"] = schemaType,
+            ["name"] = f.Name,
+            ["url"] = $"{baseUrl}/Facilities/Details/{f.Id}",
+            ["address"] = new { type = "PostalAddress", addressLocality = f.City?.Name, addressCountry = "IR", streetAddress = f.Address },
+        };
+        if (f.Lat is double la && f.Lng is double lo)
+            obj["geo"] = new { type = "GeoCoordinates", latitude = la, longitude = lo };
+        if (ratingCount > 0)
+            obj["aggregateRating"] = new { type = "AggregateRating", ratingValue = Math.Round(avgRating, 1), reviewCount = ratingCount };
+        return Fix(JsonSerializer.Serialize(obj, Opts));
+    }
+
     public static string Organization(string baseUrl) => Fix(JsonSerializer.Serialize(new Dictionary<string, object?>
     {
         ["@context"] = "https://schema.org",