feat(cmd): improve ToggleRecordsMode using view stack navigation

Improve ToggleRecordsMode by using the view stack for navigation. Instead of
manually calculating axes, it now creates a `_Records` view and switches to it,
or navigates back to the previous view if already in records mode.

- Use `ctx.layout.is_records_mode()` to detect state
- Use `effect::ViewBack` to exit records mode
- Use `effect::CreateView` and `effect::SwitchView` to enter records mode
- Simplify axis setting logic for records mode

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

src/command/cmd.rs

@@ -1434,64 +1434,38 @@ impl Cmd for ToggleRecordsMode {
         "toggle-records-mode"
     }
     fn execute(&self, ctx: &CmdContext) -> Vec<Box<dyn Effect>> {
-        use crate::view::Axis;
-        let view = ctx.model.active_view();
-
-        // Detect current state
-        let is_records = view
-            .category_axes
-            .get("_Index")
-            .copied()
-            == Some(Axis::Row)
-            && view.category_axes.get("_Dim").copied() == Some(Axis::Column);
-
-        let mut effects: Vec<Box<dyn Effect>> = Vec::new();
+        let is_records = ctx.layout.is_records_mode();
 
         if is_records {
-            // Switch back to pivot: auto-assign axes
-            // First regular category → Row, second → Column, rest → Page,
-            // virtuals/labels → None.
-            let mut row_done = false;
-            let mut col_done = false;
-            for (name, cat) in &ctx.model.categories {
-                let axis = if !cat.kind.is_regular() {
-                    Axis::None
-                } else if !row_done {
-                    row_done = true;
-                    Axis::Row
-                } else if !col_done {
-                    col_done = true;
-                    Axis::Column
-                } else {
-                    Axis::Page
-                };
+            // Navigate back to the previous view (restores original axes)
+            return vec![Box::new(effect::ViewBack), effect::set_status("Pivot mode")];
+        }
+
+        let mut effects: Vec<Box<dyn Effect>> = Vec::new();
+        let records_name = "_Records".to_string();
+
+        // Create (or replace) a _Records view and switch to it
+        effects.push(Box::new(effect::CreateView(records_name.clone())));
+        effects.push(Box::new(effect::SwitchView(records_name)));
+
+        // _Index on Row, _Dim on Column, everything else → None
+        effects.push(Box::new(effect::SetAxis {
+            category: "_Index".to_string(),
+            axis: crate::view::Axis::Row,
+        }));
+        effects.push(Box::new(effect::SetAxis {
+            category: "_Dim".to_string(),
+            axis: crate::view::Axis::Column,
+        }));
+        for name in ctx.model.categories.keys() {
+            if name != "_Index" && name != "_Dim" {
                 effects.push(Box::new(effect::SetAxis {
                     category: name.clone(),
-                    axis,
+                    axis: crate::view::Axis::None,
                 }));
             }
-            effects.push(effect::set_status("Pivot mode"));
-        } else {
-            // Switch to records mode
-            effects.push(Box::new(effect::SetAxis {
-                category: "_Index".to_string(),
-                axis: Axis::Row,
-            }));
-            effects.push(Box::new(effect::SetAxis {
-                category: "_Dim".to_string(),
-                axis: Axis::Column,
-            }));
-            // Everything else → None
-            for name in ctx.model.categories.keys() {
-                if name != "_Index" && name != "_Dim" {
-                    effects.push(Box::new(effect::SetAxis {
-                        category: name.clone(),
-                        axis: Axis::None,
-                    }));
-                }
-            }
-            effects.push(effect::set_status("Records mode"));
         }
+        effects.push(effect::set_status("Records mode"));
         effects
     }
 }