feat: Per-chat and per-story blocking modes — "Block all" (exclude list) or "Block selected" (include list) with independent storage, per-entry

keep-deleted override, and adaptive UI
feat: Quick list buttons in chats and stories — add/remove directly from DM threads and story viewer
fix: KVO observer crash from multiple registrations in story audio toggle
fix: Seen auto-bypass race condition when overlapping events (boolean → counter)
fix: Confirm reel refresh not working after first pull
fix: Startup class scan replaced with direct class lookup
imp: All menu/button text adapts to active blocking mode
imp: Mark-seen triggers at the correct point per mode
imp: Migrated unexclude_inbox_button to chat_quick_list_button
imp: Menu changes in settings now reload table for dynamic titles

src/Settings/SCIExcludedChatsViewController.m

@@ -154,7 +154,9 @@
         }];
     }
     self.filtered = all;
-    self.title = [NSString stringWithFormat:@"Chats (%lu)", (unsigned long)self.filtered.count];
+    BOOL bs = [SCIExcludedThreads isBlockSelectedMode];
+    NSString *label = bs ? @"Included chats" : @"Excluded chats";
+    self.title = [NSString stringWithFormat:@"%@ (%lu)", label, (unsigned long)self.filtered.count];
     [self.tableView reloadData];
 }