dialog refactor comment, dialog crate finished for now

client/src/dialog/logic.rs

@@ -1,5 +1,19 @@
 // src/dialog/logic.rs
 
+// TODO(dialog-refactor):
+// Currently this module (`handle_dialog_event`) contains page-specific logic
+// (e.g. Login, Register, Admin, SaveTable). This couples the dialog crate
+// to application pages and business logic.
+//
+// Refactor plan:
+// 1. Keep dialog generic: only handle navigation (next/prev/select) and return
+//    a `DialogResult` (Dismissed | Selected { purpose, index }).
+// 2. Move all page-specific actions (e.g. login::back_to_main, register::back_to_login,
+//    handle_delete_selected_columns, buffer_state.update_history) into the
+//    respective page or event handler (e.g. modes/handlers/event.rs).
+// 3. Dialog crate should only provide state, rendering, and generic navigation.
+//    Pages decide what to do when a dialog button is pressed.
+
 use crossterm::event::{Event, KeyCode};
 use crate::config::binds::config::Config;
 use crate::ui::handlers::context::DialogPurpose;