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

src/models.py

@@ -357,12 +357,14 @@ class FileItem:
  path: str
  auto_aggregate: bool = True
  force_full: bool = False
+ injected_at: Optional[float] = None
 
  def to_dict(self) -> Dict[str, Any]:
   return {
    "path": self.path,
    "auto_aggregate": self.auto_aggregate,
    "force_full": self.force_full,
+   "injected_at": self.injected_at,
   }
 
  @classmethod
@@ -371,6 +373,7 @@ class FileItem:
    path=data["path"],
    auto_aggregate=data.get("auto_aggregate", True),
    force_full=data.get("force_full", False),
+   injected_at=data.get("injected_at"),
   )
 
 @dataclass