feat(gui): add Session Insights panel with token history tracking

src/gui_2.py

@@ -333,6 +333,7 @@ class App:
       self._render_token_budget_panel()
      self._render_cache_panel()
      self._render_tool_analytics_panel()
+     self._render_session_insights_panel()
      if imgui.collapsing_header("System Prompts"):
       self._render_system_prompts_panel()
 
@@ -1509,6 +1510,19 @@ class App:
      imgui.text("0%")
    imgui.end_table()
 
+ def _render_session_insights_panel(self) -> None:
+  if not imgui.collapsing_header("Session Insights"):
+   return
+  insights = self.controller.get_session_insights()
+  imgui.text(f"Total Tokens: {insights.get('total_tokens', 0):,}")
+  imgui.text(f"API Calls: {insights.get('call_count', 0)}")
+  imgui.text(f"Burn Rate: {insights.get('burn_rate', 0):.0f} tokens/min")
+  imgui.text(f"Session Cost: ${insights.get('session_cost', 0):.4f}")
+  completed = insights.get('completed_tickets', 0)
+  efficiency = insights.get('efficiency', 0)
+  imgui.text(f"Completed: {completed}")
+  imgui.text(f"Tokens/Ticket: {efficiency:.0f}" if efficiency > 0 else "Tokens/Ticket: N/A")
+
  def _render_message_panel(self) -> None:
  # LIVE indicator
   is_live = self.ai_status in ["running powershell...", "fetching url...", "searching web...", "powershell done, awaiting AI..."]