feat: add loadout selection dialog when starting session

- Modified on_start_session to show LoadoutSelectionDialog first
- Added _on_loadout_selected_for_session callback
- User can now select a loadout or skip before session starts
- Selected loadout info is logged and stored for session

ui/main_window.py

@@ -1165,8 +1165,29 @@ class MainWindow(QMainWindow):
                 self.log_error("EventQueue", f"Error processing event: {e}")
     
     def on_start_session(self):
-        """Handle start session button."""
+        """Handle start session button - shows loadout selection first."""
         if self.current_project and self.session_state == SessionState.IDLE:
+            # Show loadout selection dialog
+            from ui.loadout_selection_dialog import LoadoutSelectionDialog
+            dialog = LoadoutSelectionDialog(self)
+            dialog.loadout_selected.connect(self._on_loadout_selected_for_session)
+            dialog.rejected.connect(lambda: self.log_info("Session", "Session start cancelled - no loadout selected"))
+            dialog.exec()
+
+    def _on_loadout_selected_for_session(self, loadout_id: int, loadout_name: str):
+        """Handle loadout selection and start session."""
+        if loadout_id > 0:
+            self.log_info("Session", f"Starting session with loadout: {loadout_name} (ID: {loadout_id})")
+            # Store the selected loadout ID for use in start_session
+            self._session_loadout_id = loadout_id
+            self._session_loadout_name = loadout_name
+        else:
+            self.log_info("Session", "Starting session without loadout")
+            self._session_loadout_id = None
+            self._session_loadout_name = None
+        
+        # Now start the session
+        if self.current_project:
             self.start_session(self.current_project.id)
     
     def on_stop_session(self):