Track window area and refactor keybinding APIs

- Track terminal size in `App::window_area` and update on resize
- Accept action slices in `count_largest_group` and
  `KeybindingsWidget::new`
- Add ACTIONS slices and layout helpers for default, main_menu, skirmish
- Add `main_menu_option_helper` for formatting menu strings and export
  it

src/app/app.rs

@@ -5,6 +5,7 @@ use crate::{
 use ratatui::{
     DefaultTerminal, Frame,
     crossterm::event::{self, KeyEvent},
+    layout::Rect,
 };
 use std::{
     io::Result,
@@ -20,6 +21,7 @@ pub enum Event {
 pub struct App {
     pub exit: bool,
     pub view: View,
+    pub window_area: Rect,
     pub states: GameStates,
 }
 
@@ -31,6 +33,7 @@ impl App {
         Self {
             exit: false,
             view: args.view,
+            window_area: Rect::default(),
             states,
         }
     }
@@ -56,7 +59,15 @@ impl App {
     }
 
     fn draw(&mut self, frame: &mut Frame<'_>) {
-        frame.render_widget(self, frame.area());
+        let window_area: Rect = frame.area();
+
+        if window_area.width != self.window_area.width
+            || window_area.height != self.window_area.height
+        {
+            self.window_area = window_area;
+        }
+
+        frame.render_widget(self, window_area);
     }
 
     fn handle_key_event(&mut self, key_event: KeyEvent) -> Result<()> {

src/app/helpers/main_menu_option.rs

@@ -0,0 +1,13 @@
+pub fn main_menu_option_helper(s: String) -> String {
+    if let Some(pos) = s
+        .char_indices()
+        .filter(|(_, c)| c.is_ascii_uppercase())
+        .nth(1)
+        .map(|(i, _)| i)
+    {
+        let (first, second) = s.split_at(pos);
+        format!("{first} {second}")
+    } else {
+        s
+    }
+}

src/app/helpers/mod.rs

@@ -1,5 +1,7 @@
 pub mod block_title;
+pub mod main_menu_option;
 pub mod zoom_level;
 
 pub use block_title::{block_single_title_helper, block_title_helper};
+pub use main_menu_option::main_menu_option_helper;
 pub use zoom_level::{CellSizes, cell_size_helper};

src/app/keybindings/keybindings.rs

@@ -284,7 +284,7 @@ pub fn event_to_action(event: &KeyEvent) -> Option<Action> {
 /// It counts how many times each group appears in the supplied actions and
 /// returns the highest count. This can be used, for example, to size UI
 /// elements that display groups of bindings.
-pub fn count_largest_group(actions: &Vec<Action>) -> u16 {
+pub fn count_largest_group(actions: &[Action]) -> u16 {
     let mut group_counts: HashMap<Group, u16> = HashMap::new();
 
     for action in actions {

src/app/views/default.rs

@@ -9,15 +9,18 @@ use ratatui::{
     widgets::{Block, Borders, Paragraph, Widget},
 };
 
-pub fn default_view(area: Rect, buf: &mut Buffer) {
-    let actions: Vec<Action> = vec![Action::Quit, Action::Quit2, Action::Esc];
+const ACTIONS: &[Action] = &[Action::Quit, Action::Quit2, Action::Esc];
 
-    let vertical_layout: Layout = Layout::vertical([
+fn default_view_layout(area: Rect) -> [Rect; 2] {
+    Layout::vertical([
         Constraint::Fill(1),
-        Constraint::Length(count_largest_group(&actions) + 2),
-    ]);
+        Constraint::Length(count_largest_group(&ACTIONS) + 2),
+    ])
+    .areas(area)
+}
 
-    let [main_area, keybindings_area] = vertical_layout.areas(area);
+pub fn default_view(area: Rect, buf: &mut Buffer) {
+    let [main_area, keybindings_area] = default_view_layout(area);
 
     {
         Paragraph::new("Work in progress")
@@ -32,6 +35,6 @@ pub fn default_view(area: Rect, buf: &mut Buffer) {
     }
 
     {
-        KeybindingsWidget::new(actions).render(keybindings_area, buf);
+        KeybindingsWidget::new(ACTIONS).render(keybindings_area, buf);
     }
 }

src/app/views/main_menu.rs

@@ -1,5 +1,6 @@
 use crate::app::{
     App, View,
+    helpers::main_menu_option_helper,
     keybindings::{Action, count_largest_group},
     widgets::KeybindingsWidget,
 };
@@ -12,35 +13,24 @@ use ratatui::{
     widgets::{Block, Borders, Paragraph, Widget},
 };
 
-fn format_view_string(s: String) -> String {
-    if let Some(pos) = s
-        .char_indices()
-        .filter(|(_, c)| c.is_ascii_uppercase())
-        .nth(1)
-        .map(|(i, _)| i)
-    {
-        let (first, second) = s.split_at(pos);
-        format!("{first} {second}")
-    } else {
-        s
-    }
+const ACTIONS: &[Action] = &[
+    Action::Up,
+    Action::Down,
+    Action::Space,
+    Action::Quit,
+    Action::Quit2,
+];
+
+fn main_menu_layout(area: Rect) -> [Rect; 2] {
+    Layout::vertical([
+        Constraint::Fill(1),
+        Constraint::Length(count_largest_group(&ACTIONS) + 2),
+    ])
+    .areas(area)
 }
 
 pub fn main_menu_view(app: &App, area: Rect, buf: &mut Buffer) {
-    let actions: Vec<Action> = vec![
-        Action::Up,
-        Action::Down,
-        Action::Space,
-        Action::Quit,
-        Action::Quit2,
-    ];
-
-    let vertical_layout: Layout = Layout::vertical([
-        Constraint::Fill(1),
-        Constraint::Length(count_largest_group(&actions) + 2),
-    ]);
-
-    let [main_menu_area, keybindings_area] = vertical_layout.areas(area);
+    let [main_menu_area, keybindings_area] = main_menu_layout(area);
 
     Block::new()
         .borders(Borders::LEFT | Borders::TOP | Borders::RIGHT)
@@ -78,7 +68,7 @@ pub fn main_menu_view(app: &App, area: Rect, buf: &mut Buffer) {
             .enumerate()
             .filter(|(_, v)| v != &&View::MainMenu)
             .map(|(i, view)| {
-                let view_string: String = format_view_string(format!("{:?}", view));
+                let view_string: String = main_menu_option_helper(format!("{:?}", view));
 
                 let styled: Line<'_> = if app.states.main_menu.selected_view == i {
                     Line::from_iter(["> ".cyan(), view_string.yellow()]).yellow()
@@ -98,6 +88,6 @@ pub fn main_menu_view(app: &App, area: Rect, buf: &mut Buffer) {
     }
 
     {
-        KeybindingsWidget::new(actions).render(keybindings_area, buf);
+        KeybindingsWidget::new(ACTIONS).render(keybindings_area, buf);
     }
 }

src/app/views/skirmish.rs

@@ -12,30 +12,33 @@ use ratatui::{
     widgets::{Block, Borders, Padding, Paragraph, Widget},
 };
 
-pub fn skirmish_view(app: &mut App, area: Rect, buf: &mut Buffer) {
-    let actions: Vec<Action> = vec![
-        Action::Up,
-        Action::Down,
-        Action::Left,
-        Action::Right,
-        Action::ScrollUp,
-        Action::ScrollDown,
-        Action::ScrollLeft,
-        Action::ScrollRight,
-        Action::ZoomIn,
-        Action::ZoomOut,
-        Action::Quit,
-        Action::Quit2,
-        Action::Esc,
-    ];
+const ACTIONS: &[Action] = &[
+    Action::Up,
+    Action::Down,
+    Action::Left,
+    Action::Right,
+    Action::ScrollUp,
+    Action::ScrollDown,
+    Action::ScrollLeft,
+    Action::ScrollRight,
+    Action::ZoomIn,
+    Action::ZoomOut,
+    Action::Quit,
+    Action::Quit2,
+    Action::Esc,
+];
 
-    let vertical_layout: Layout = Layout::vertical([
+fn skirmish_layout(area: Rect) -> [Rect; 3] {
+    Layout::vertical([
         Constraint::Length(4),
         Constraint::Fill(1),
-        Constraint::Length(count_largest_group(&actions) + 2),
-    ]);
+        Constraint::Length(count_largest_group(&ACTIONS) + 2),
+    ])
+    .areas(area)
+}
 
-    let [title_area, main_area, keybindings_area] = vertical_layout.areas(area);
+pub fn skirmish_view(app: &mut App, area: Rect, buf: &mut Buffer) {
+    let [title_area, main_area, keybindings_area] = skirmish_layout(area);
 
     {
         let lines: Vec<Line<'_>> = Vec::from_iter([
@@ -92,6 +95,6 @@ pub fn skirmish_view(app: &mut App, area: Rect, buf: &mut Buffer) {
     }
 
     {
-        KeybindingsWidget::new(actions).render(keybindings_area, buf);
+        KeybindingsWidget::new(ACTIONS).render(keybindings_area, buf);
     }
 }

src/app/widgets/keybindings.rs

@@ -32,12 +32,12 @@ impl KeybindingsWidget {
     ///
     /// # Parameters
     ///
-    /// * `actions` – A vector of actions for which keybindings should be shown.
+    /// * `actions` – A slice of actions for which keybindings should be shown.
     ///
     /// # Returns
     ///
     /// A fully‑initialised `KeybindingsWidget` ready for rendering.
-    pub fn new(actions: Vec<Action>) -> Self {
+    pub fn new(actions: &[Action]) -> Self {
         let keybindings: Vec<Option<&'static KeyBinding>> =
             actions.iter().map(|a| binding_for(*a)).collect();