Fix incorrect imports in lightning docs (#14678)

docs/source-app/workflows/add_web_ui/html/basic.rst

@@ -56,7 +56,7 @@ First **create a file named app.py** with the app content (in the same folder as
 
     class HelloComponent(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.web.StaticWebFrontend(serve_dir='.')
+            return L.app.frontend.web.StaticWebFrontend(serve_dir='.')
 
     class LitApp(L.LightningFlow):
         def __init__(self):
@@ -107,7 +107,7 @@ Give the component an HTML UI, by returning a ``StaticWebFrontend`` object from
 
     class HelloComponent(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.web.StaticWebFrontend(serve_dir='.')
+            return L.app.frontend.web.StaticWebFrontend(serve_dir='.')
 
     class LitApp(L.LightningFlow):
         def __init__(self):
@@ -137,7 +137,7 @@ In this case, we render the ``HelloComponent`` UI in the ``home`` tab of the app
 
     class HelloComponent(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.web.StaticWebFrontend(serve_dir='.')
+            return L.app.frontend.web.StaticWebFrontend(serve_dir='.')
 
     class LitApp(L.LightningFlow):
         def __init__(self):

docs/source-app/workflows/add_web_ui/react/connect_react_and_lightning.rst

@@ -82,12 +82,12 @@ You can use this single react app for the FULL Lightning app, or you can specify
 
     class ComponentA(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.StaticWebFrontend(Path(__file__).parent / "react_app_1/dist")
+            return L.app.frontend.StaticWebFrontend(Path(__file__).parent / "react_app_1/dist")
 
 
     class ComponentB(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.StaticWebFrontend(Path(__file__).parent / "react_app_2/dist")
+            return L.app.frontend.StaticWebFrontend(Path(__file__).parent / "react_app_2/dist")
 
 
     class HelloLitReact(L.LightningFlow):

docs/source-app/workflows/add_web_ui/streamlit/basic.rst

@@ -46,7 +46,7 @@ First **create a file named app.py** with the app content:
 
     class LitStreamlit(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
+            return L.app.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
 
     class LitApp(L.LightningFlow):
         def __init__(self):
@@ -125,7 +125,7 @@ the ``configure_layout`` method of the Lightning component you want to connect t
 
     class LitStreamlit(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
+            return L.app.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
 
     class LitApp(L.LightningFlow):
         def __init__(self):
@@ -160,7 +160,7 @@ In this case, we render the ``LitStreamlit`` UI in the ``home`` tab of the appli
 
     class LitStreamlit(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
+            return L.app.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
 
     class LitApp(L.LightningFlow):
         def __init__(self):

docs/source-app/workflows/add_web_ui/streamlit/intermediate.rst

@@ -35,7 +35,7 @@ For example, here we increase the count variable of the Lightning Component ever
             self.count = 0
 
         def configure_layout(self):
-            return L.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
+            return L.app.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
 
 
     class LitApp(L.LightningFlow):
@@ -81,7 +81,7 @@ In this example we update the value of the counter from the component:
             self.count += 1
 
         def configure_layout(self):
-            return L.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
+            return L.app.frontend.StreamlitFrontend(render_fn=your_streamlit_app)
 
 
     class LitApp(L.LightningFlow):

docs/source-app/workflows/build_lightning_component/intermediate.rst

@@ -32,12 +32,11 @@ To *connect* this user interface to the Component, define the configure_layout m
     :emphasize-lines: 5, 6
 
     import lightning as L
-    from lightning_app.frontend.web import StaticWebFrontend
 
 
     class LitHTMLComponent(L.LightningFlow):
         def configure_layout(self):
-            return StaticWebFrontend(serve_dir="path/to/folder/with/index.html/inside")
+            return L.app.frontend.StaticWebFrontend(serve_dir="path/to/folder/with/index.html/inside")
 
 Finally, route the Component's UI through the root Component's **configure_layout** method:
 
@@ -50,7 +49,7 @@ Finally, route the Component's UI through the root Component's **configure_layou
 
     class LitHTMLComponent(L.LightningFlow):
         def configure_layout(self):
-            return L.frontend.web.StaticWebFrontend(serve_dir="path/to/folder/with/index.html/inside")
+            return L.app.frontend.web.StaticWebFrontend(serve_dir="path/to/folder/with/index.html/inside")
 
 
     class LitApp(L.LightningFlow):