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/Me/Index.cshtml

@@ -16,8 +16,6 @@
     };
 }
 
-<partial name="_PanelNav" />
-
 <div class="page-head">
     <div class="container">
         <h1>پنل کارجو</h1>