feat(records): implement records mode for data entry

Implement a new "Records" mode for data entry.
- Add `RecordsNormal` and `RecordsEditing` to `AppMode` and `ModeKey` .
- `DataStore` now uses `IndexMap` and supports `sort_by_key()` to ensure
  deterministic row order.
- `ToggleRecordsMode` command now sorts data and switches to
  `RecordsNormal` .
- `EnterEditMode` command now respects records editing variants.
- `RecordsNormal` mode includes a new `o` keybinding to add a record row.
- `RecordsEditing` mode inherits from `Editing` and adds an `Esc` binding
  to return to `RecordsNormal` .
- Added `SortData` effect to trigger data sorting.
- Updated UI to display "RECORDS" and "RECORDS INSERT" mode names and
  styles.
- Updated keymaps, command registry, and view navigation to support these
  new modes.
- Added comprehensive tests for records mode behavior, including sorting
  and boundary conditions for Tab/Enter.

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

src/draw.rs

@@ -133,12 +133,16 @@ fn mode_name(mode: &AppMode) -> &'static str {
         AppMode::CommandMode { .. } => "COMMAND",
         AppMode::Help => "HELP",
         AppMode::Quit => "QUIT",
+        AppMode::RecordsNormal => "RECORDS",
+        AppMode::RecordsEditing { .. } => "RECORDS INSERT",
     }
 }
 
 fn mode_style(mode: &AppMode) -> Style {
     match mode {
-        AppMode::Editing { .. } => Style::default().fg(Color::Black).bg(Color::Green),
+        AppMode::Editing { .. } | AppMode::RecordsEditing { .. } => {
+            Style::default().fg(Color::Black).bg(Color::Green)
+        }
         AppMode::CommandMode { .. } => Style::default().fg(Color::Black).bg(Color::Yellow),
         AppMode::TileSelect => Style::default().fg(Color::Black).bg(Color::Magenta),
         _ => Style::default().fg(Color::Black).bg(Color::DarkGray),