Redesign header menu: separate account dropdown from dashboard nav

The profile dropdown was doing three jobs at once (account actions, the
job-seeker panel menu, and the admin panel menu) and a stray inline @if
for the notification badge leaked into the markup as literal text.

- Profile dropdown is now account-only: identity card (avatar + name +
  phone), one role-aware dashboard entry, edit profile, logout. This
  removes the leaked @if and de-clutters the menu.
- Dashboard menu is centralized in _PanelNav and auto-rendered by the
  layout on every logged-in panel page (/Admin, /Me, /Employer,
  /Preferences) instead of being duplicated in the dropdown and pages.
- Drop the now-duplicate manual <partial name="_PanelNav" /> from
  Overview, Ingested, Me/Index, Employer/Index.
- CSS: identity-card (.pd-id) styles + mobile tweaks.

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

src/JobsMedical.Web/Pages/Admin/Ingested.cshtml

@@ -8,8 +8,6 @@
         $"<a class=\"ing-pill {(Model.Status == key || (Model.Status is null && key == "all") ? "active" : "")}\" href=\"?status={key}\">{label} ({P(count)})</a>";
 }
 
-<partial name="_PanelNav" />
-
 <div class="page-head">
     <div class="container">
         <h1>نتایج جمع‌آوری</h1>

src/JobsMedical.Web/Pages/Admin/Overview.cshtml

@@ -5,8 +5,6 @@
     string P(int n) => JalaliDate.ToPersianDigits(n.ToString());
 }
 
-<partial name="_PanelNav" />
-
 <div class="page-head">
     <div class="container">
         <h1>داشبورد مدیریت</h1>