[00251] Change ViewTree API from Box<dyn View> to Arc<dyn View>

[rorychatt]

Summary

Changed the ViewTree public API (new, insert, insert_with_id) and ChildViewEntry from accepting Box<dyn View> to Arc<dyn View>. This removes the internal Arc::from(box) conversion, making Arc ownership explicit to callers and avoiding double indirection. Updated all production and test callers from Box::new(...) to Arc::new(...).

API Changes

• ViewTree::new(root_view: Box<dyn View>) → ViewTree::new(root_view: Arc<dyn View>)
• ViewTree::insert(&mut self, parent_id: ViewId, view: Box<dyn View>) → ViewTree::insert(&mut self, parent_id: ViewId, view: Arc<dyn View>)
• ViewTree::insert_with_id(&mut self, parent_id: ViewId, child_id: ViewId, view: Box<dyn View>) → ViewTree::insert_with_id(&mut self, parent_id: ViewId, child_id: ViewId, view: Arc<dyn View>)
• ChildViewEntry.view: Box<dyn View> → ChildViewEntry.view: Arc<dyn View>

Files Modified

• rusty/src/core/view_tree.rs — Changed method signatures and internal storage assignment; updated all test callers
• rusty/src/core/runtime.rs — Updated Runtime::new and test callers to use Arc::new
• rusty/src/views/view.rs — Changed ChildViewEntry.view type and child_view() construction site

Commits

• 00c9807