Fix Docker apply crash and add safe profile test flow

Remove invalid _mirror_manager from daemon.json that prevented Docker from starting. Add 2-minute test apply with auto-rollback, final apply confirmation, emergency-restore CLI/UI, and post-restart Docker health checks.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/templates/settings/index.html

@@ -29,7 +29,12 @@
     <h5>Rollback و تست</h5>
     <div class="row g-3 mb-4">
         <div class="col-md-4">
-            <label class="form-label">پنجره rollback پیش‌فرض (دقیقه)</label>
+            <label class="form-label">پنجره تست موقت (دقیقه)</label>
+            <input type="number" name="test_rollback_minutes" class="form-control" value="{{ settings.get('test_rollback_minutes', '2') }}" min="1" max="30">
+            <div class="form-text">پس از «تست موقت» — rollback خودکار اگر تأیید نشود</div>
+        </div>
+        <div class="col-md-4">
+            <label class="form-label">پنجره rollback قدیمی (دقیقه)</label>
             <input type="number" name="rollback_minutes" class="form-control" value="{{ settings.get('rollback_minutes', '15') }}" min="5" max="60">
         </div>
         <div class="col-md-4">