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>

.env.example

@@ -12,6 +12,7 @@ DATA_DIR=/app/data
 
 # ─── رفتار ───
 ROLLBACK_MINUTES=15
+TEST_ROLLBACK_MINUTES=2
 AUTO_TEST_INTERVAL_MINUTES=30
 FLASK_ENV=production