Use view_model_update instead of nest_view_model_update in samples (#691)

The main and nested views now share one root model (nested views inherit the
main view's model via UI5 propagation), so refreshing the main model via
view_model_update also refreshes the nested views. The nest-specific
nest_view_model_update call is therefore redundant.

- 065: switch the demo call, button label and comment to view_model_update.
- 097 / 098: replace the nest call; where it was already paired with a
  view_model_update, collapse the two into the single remaining call.


Claude-Session: https://claude.ai/code/session_01F4VXychqy741rejPzYwLxy

Co-authored-by: Claude <noreply@anthropic.com>

Author: oblomov-dev

src/01/01/z2ui5_cl_demo_app_065.clas.abap

@@ -42,7 +42,7 @@ CLASS z2ui5_cl_demo_app_065 IMPLEMENTATION.
                  press = client->_event( `MAIN` )
       )->button( text  = `Rerender only nested view`
                  press = client->_event( `NEST` )
-      )->button( text  = `Update only nested MODEL (nest_view_model_update)`
+      )->button( text  = `Update only nested MODEL (view_model_update)`
                  press = client->_event( `NEST_MODEL` )
       )->input( client->_bind( mv_input_main ) ).
 
@@ -77,13 +77,13 @@ CLASS z2ui5_cl_demo_app_065 IMPLEMENTATION.
                                    method_insert = `addContent` ).
 
       WHEN `NEST_MODEL`.
-        " change only a nest-bound field and refresh the nested view's model
-        " copy (no re-render of the nested XML) - this isolates the effect of
-        " nest_view_model_update. Press "Rerender only nested view" first so
-        " the nested view exists.
+        " change only a nest-bound field and refresh the shared view model
+        " (no re-render of the nested XML). The main and nested views share one
+        " model, so view_model_update refreshes the nested view too. Press
+        " "Rerender only nested view" first so the nested view exists.
         mv_count      = mv_count + 1.
         mv_input_nest = |nest model updated #{ mv_count }|.
-        client->nest_view_model_update( ).
+        client->view_model_update( ).
     ENDCASE.
 
   ENDMETHOD.

src/01/01/z2ui5_cl_demo_app_097.clas.abap

@@ -133,7 +133,7 @@ CLASS z2ui5_cl_demo_app_097 IMPLEMENTATION.
       WHEN `ROW_DELETE`.
 
         DELETE t_tab2 WHERE uuid = client->get_event_arg( ).
-        client->nest_view_model_update( ).
+        client->view_model_update( ).
 
       WHEN `SELCHANGE`.
         DATA(lt_sel) = t_tab.
@@ -145,7 +145,6 @@ CLASS z2ui5_cl_demo_app_097 IMPLEMENTATION.
 
         mv_layout = `TwoColumnsMidExpanded`.
 
-        client->nest_view_model_update( ).
         client->view_model_update( ).
     ENDCASE.
 

src/01/01/z2ui5_cl_demo_app_098.clas.abap

@@ -166,7 +166,6 @@ CLASS z2ui5_cl_demo_app_098 IMPLEMENTATION.
           mv_title  = client->get_event_arg( ).
         ENDIF.
 
-        client->nest_view_model_update( ).
         client->view_model_update( ).
         view_display_detail_detail( ).
 
@@ -181,7 +180,6 @@ CLASS z2ui5_cl_demo_app_098 IMPLEMENTATION.
 
         mv_layout = `TwoColumnsMidExpanded`.
 
-        client->nest_view_model_update( ).
         client->view_model_update( ).
 
         view_display_detail( ).