Unify recommendations across shifts AND jobs

Recommendations only scored open shifts, but almost all roles — doctors especially — exist as
استخدام (jobs), not dated shifts, and the only shifts are a handful of nurse shifts. So a visitor
who prefers «پزشک» got nurse-shift recommendations (scored by city/freshness) because there were
no doctor shifts to surface.

Now the engine scores BOTH shifts and job openings: role/city/facility/pay/freshness apply to
each, behavioral affinities are derived from shift AND job interest events, and the merged top-N
is returned. Recommendation can now carry a Shift or a JobOpening; the card renders either
(job → /Jobs/Details with employment type + salary; shift → unchanged with hour-bar). Cold start
interleaves the freshest of both.

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

src/JobsMedical.Web/Pages/Shared/_RecommendationCard.cshtml

@@ -1,32 +1,60 @@
 @model JobsMedical.Web.Services.Recommendation
 @{
-    var s = Model.Shift;
-    var (badgeClass, typeLabel) = s.ShiftType switch
+    var isJob = Model.IsJob;
+    var role = isJob ? Model.Job!.Role?.Name : Model.Shift!.Role?.Name;
+    var fac = isJob ? Model.Job!.Facility : Model.Shift!.Facility;
+    var gender = isJob ? Model.Job!.GenderRequirement : Model.Shift!.GenderRequirement;
+    var url = isJob ? $"/Jobs/Details/{Model.Job!.Id}" : $"/Shifts/Details/{Model.Shift!.Id}";
+    string empLabel(JobsMedical.Web.Models.EmploymentType t) => t switch
     {
-        ShiftType.Day => ("badge-day", "صبح"),
-        ShiftType.Evening => ("badge-evening", "عصر"),
-        ShiftType.Night => ("badge-night", "شب"),
-        _ => ("badge-oncall", "آنکال"),
+        JobsMedical.Web.Models.EmploymentType.PartTime => "پاره‌وقت",
+        JobsMedical.Web.Models.EmploymentType.Contract => "قراردادی",
+        JobsMedical.Web.Models.EmploymentType.Plan => "طرح",
+        _ => "تمام‌وقت",
     };
 }
-<a class="card card-pad shift-card" asp-page="/Shifts/Details" asp-route-id="@s.Id">
+<a class="card card-pad shift-card" href="@url">
     <div class="row" style="justify-content: space-between;">
-        <span class="facility">@(s.Role?.Name ?? "شیفت")</span>
-        <span class="badge @badgeClass">@typeLabel</span>
+        <span class="facility">@(role ?? (isJob ? "استخدام" : "شیفت"))</span>
+        @if (isJob)
+        {
+            <span class="badge badge-job">استخدام</span>
+        }
+        else
+        {
+            var s = Model.Shift!;
+            var (badgeClass, typeLabel) = s.ShiftType switch
+            {
+                ShiftType.Day => ("badge-day", "صبح"),
+                ShiftType.Evening => ("badge-evening", "عصر"),
+                ShiftType.Night => ("badge-night", "شب"),
+                _ => ("badge-oncall", "آنکال"),
+            };
+            <span class="badge @badgeClass">@typeLabel</span>
+        }
     </div>
     <div class="row">
-        @if (s.GenderRequirement != Gender.Any)
+        @if (gender != Gender.Any)
         {
-            <span class="badge badge-gender">@JalaliDate.GenderLabel(s.GenderRequirement)</span>
+            <span class="badge badge-gender">@JalaliDate.GenderLabel(gender)</span>
         }
-        @if (JobsMedical.Web.Services.SeoJsonLd.HasRealEmployer(s.Facility))
+        @if (JobsMedical.Web.Services.SeoJsonLd.HasRealEmployer(fac))
         {
-            <span>🏥 @s.Facility?.Name</span>
+            <span>🏥 @fac?.Name</span>
         }
-        <span>📍 @s.Facility?.City?.Name</span>
+        <span>📍 @fac?.City?.Name</span>
     </div>
-    <div class="row">📅 @JalaliDate.WeekDayName(s.Date)، @JalaliDate.ToLongDate(s.Date) — 🕐 @JalaliDate.Time(s.StartTime)</div>
-    <partial name="_HourBar" model="s" />
+
+    @if (isJob)
+    {
+        <div class="row">💼 @empLabel(Model.Job!.EmploymentType)</div>
+    }
+    else
+    {
+        var s = Model.Shift!;
+        <div class="row">📅 @JalaliDate.WeekDayName(s.Date)، @JalaliDate.ToLongDate(s.Date) — 🕐 @JalaliDate.Time(s.StartTime)</div>
+        <partial name="_HourBar" model="s" />
+    }
 
     @* The "why" — what makes a pattern engine trustworthy: every pick is explained. *@
     <div class="rec-reasons">
@@ -37,7 +65,17 @@
     </div>
 
     <div class="foot">
-        <span class="pay">@JalaliDate.PayLabel(s.PayType, s.PayAmount, s.SharePercent)</span>
+        <span class="pay">
+            @if (isJob)
+            {
+                @(Model.Job!.SalaryMin is long m ? JalaliDate.ToPersianDigits(m.ToString("#,0")) + " تومان" : "توافقی")
+            }
+            else
+            {
+                var s = Model.Shift!;
+                @JalaliDate.PayLabel(s.PayType, s.PayAmount, s.SharePercent)
+            }
+        </span>
         <span class="btn btn-outline" style="padding: 6px 14px;">جزئیات</span>
     </div>
 </a>