feat(mma): Implement track-scoped history and optimized sub-agent toolsets

gui_2.py

@@ -754,6 +754,12 @@ class App:
             self.active_track = None
             self.active_tickets = []
 
+        # Load track-scoped history if track is active
+        if self.active_track:
+            track_history = project_manager.load_track_history(self.active_track.id, self.ui_files_base_dir)
+            if track_history:
+                self.disc_entries = _parse_history_entries(track_history, self.disc_roles)
+
     def _save_active_project(self):
         if self.active_project_path:
             try:
@@ -790,6 +796,10 @@ class App:
 
     def _flush_disc_entries_to_project(self):
         history_strings = [project_manager.entry_to_str(e) for e in self.disc_entries]
+        if self.active_track:
+            project_manager.save_track_history(self.active_track.id, history_strings, self.ui_files_base_dir)
+            return
+
         disc_sec = self.project.setdefault("discussion", {})
         discussions = disc_sec.setdefault("discussions", {})
         disc_data = discussions.setdefault(self.active_discussion, project_manager.default_discussion())
@@ -1398,7 +1408,8 @@ class App:
         self._save_active_project()
         self._flush_to_config()
         save_config(self.config)
-        flat = project_manager.flat_config(self.project, self.active_discussion)
+        track_id = self.active_track.id if self.active_track else None
+        flat = project_manager.flat_config(self.project, self.active_discussion, track_id=track_id)
         full_md, path, file_items = aggregate.run(flat)
         # Build stable markdown (no history) for Gemini caching
         screenshot_base_dir = Path(flat.get("screenshots", {}).get("base_dir", "."))