fix: merge duplicate symbols, expand Zoroastrian citations, add reading deletion to sessions, and deduplicate Word of the Day

lib/screens/cross_system_comparison_screen.dart

@@ -152,6 +152,35 @@ class _CrossSystemComparisonScreenState extends State<CrossSystemComparisonScree
     );
   }
 
+  void _confirmDeleteReading(SyncreticReading reading) {
+    showDialog(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        backgroundColor: const Color(0xFF151829),
+        title: const Text('Удалить расклад?', style: TextStyle(color: Color(0xFFFFF9C4), fontSize: 16, fontWeight: FontWeight.bold)),
+        content: Text('Удалить «${reading.systemName} (${reading.layoutTitle})» из текущей сессии дня?', style: const TextStyle(color: Color(0xFFECEFF1), fontSize: 13)),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx),
+            child: const Text('Отмена', style: TextStyle(color: Color(0xFF8C93B8))),
+          ),
+          ElevatedButton(
+            style: ElevatedButton.styleFrom(backgroundColor: const Color(0xFFEF5350), foregroundColor: Colors.white),
+            onPressed: () async {
+              Navigator.pop(ctx);
+              await _repo.removeReadingFromSyncreticSession(reading.id);
+              setState(() {
+                _session = _repo.currentSyncreticSession;
+              });
+              HapticFeedback.mediumImpact();
+            },
+            child: const Text('Удалить'),
+          ),
+        ],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     final readings = _session.readings;
@@ -332,6 +361,11 @@ class _CrossSystemComparisonScreenState extends State<CrossSystemComparisonScree
                   ],
                 ),
               ),
+              IconButton(
+                icon: const Icon(Icons.close_rounded, size: 20, color: Color(0xFFEF5350)),
+                tooltip: 'Удалить из сессии',
+                onPressed: () => _confirmDeleteReading(reading),
+              ),
             ],
           ),
           const SizedBox(height: 12),