feat(gui): Implement Session Hub and context injection visibility

src/app_controller.py

@@ -243,6 +243,8 @@ class AppController:
   self.ai_status: str = 'idle'
   self.ai_response: str = ''
   self.last_md: str = ''
+  self.last_aggregate_markdown: str = ''
+  self.last_resolved_system_prompt: str = ''
   self.last_md_path: Optional[Path] = None
   self.last_file_items: List[Any] = []
   self.send_thread: Optional[threading.Thread] = None
@@ -2516,6 +2518,11 @@ class AppController:
   # Build discussion history text separately
   history = flat.get("discussion", {}).get("history", [])
   discussion_text = aggregate.build_discussion_text(history)
+  
+  csp = filter(bool, [self.ui_global_system_prompt.strip(), self.ui_project_system_prompt.strip()])
+  self.last_resolved_system_prompt = "\n\n".join(csp)
+  self.last_aggregate_markdown = full_md
+  
   return full_md, path, file_items, stable_md, discussion_text
 
  def _cb_plan_epic(self) -> None: