[App] Fix bug when using structures with works

src/lightning_app/structures/dict.py

@@ -64,10 +64,10 @@ def __setitem__(self, k, v):
         if isinstance(k, str) and "." in k:
             raise Exception(f"The provided name {k} contains . which is forbidden.")
 
+        _set_child_name(self, v, k)
         if self._backend:
             if isinstance(v, LightningFlow):
                 LightningFlow._attach_backend(v, self._backend)
-                _set_child_name(self, v, k)
             elif isinstance(v, LightningWork):
                 self._backend._wrap_run_method(_LightningAppRef().get_current(), v)
         v._name = f"{self.name}.{k}"

src/lightning_app/structures/list.py

@@ -55,20 +55,18 @@ def __init__(self, *items: T):
         self._backend: Optional[Backend] = None
         for item in items:
             self.append(item)
-            _set_child_name(self, item, str(self._last_index))
-            self._last_index += 1
 
     def append(self, v):
         from lightning_app import LightningFlow, LightningWork
 
+        _set_child_name(self, v, str(self._last_index))
         if self._backend:
             if isinstance(v, LightningFlow):
                 LightningFlow._attach_backend(v, self._backend)
-                _set_child_name(self, v, str(self._last_index))
             elif isinstance(v, LightningWork):
                 self._backend._wrap_run_method(_LightningAppRef().get_current(), v)
-            v._name = f"{self.name}.{self._last_index}"
-            self._last_index += 1
+        v._name = f"{self.name}.{self._last_index}"
+        self._last_index += 1
         super().append(v)
 
     @property