refactor(ui): ensure layout is rebuilt and use Rc for drill state

Update UI components and effects to ensure layout is rebuilt when necessary.

- Rebuild layout in `EnterEditAtCursor` effect
- Use `Rc` for sharing records in `StartDrill` effect
- Improve formatting in `SetDrillPendingEdit` effect
- Update test case in `App` to use multi-line method calls

Co-Authored-By: fiddlerwoaroof/git-smart-commit (unsloth/gemma-4-26B-A4B-it-GGUF:UD-Q5_K_XL)

src/ui/app.rs

@@ -506,7 +506,10 @@ mod tests {
         let mut app = two_col_model();
         // Total rows: A, B, C + R0..R9 = 13 rows. Last row = 12.
         for i in 0..10 {
-            app.model.category_mut("Row").unwrap().add_item(&format!("R{i}"));
+            app.model
+                .category_mut("Row")
+                .unwrap()
+                .add_item(&format!("R{i}"));
         }
         app.term_height = 13; // ~5 visible rows
         app.model.active_view_mut().selected = (0, 0);