Add max durability and enhance side panel UI

- Introduce `max_durability` fields to BaseBuilding, Stone, and Tunnel
  structures.
- Extend `Structure` trait with `get_max_durability` and implement it in
  all structures.
- Update `Structures` enum to forward `get_max_durability`.
- Add color utilities and `get_span` method to `Players` enum for styled
  text.
- Refactor `CellWidget` method names (`get_option_unit`,
  `set_structure`).
- Revise side panel widget to accept references to `Structures` and
  `Option<Units>`, render colored blocks and detailed stats.
- Simplify skirmish view to use `BoardState` directly and adapt side
  panel rendering.

src/app/states/skirmish.rs

@@ -1,5 +1,9 @@
 use crate::app::states::skirmish_states::BoardState;
 use clap::ValueEnum;
+use ratatui::{
+    style::{Color, Stylize},
+    text::Span,
+};
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct SkirmishState {
@@ -20,3 +24,26 @@ pub enum Players {
     Player,
     Enemy,
 }
+
+impl Players {
+    pub fn get_text(&self) -> &'static str {
+        match self {
+            Self::Player => "Player",
+            Self::Enemy => "Enemy",
+        }
+    }
+
+    pub fn get_color(&self) -> Color {
+        match self {
+            Self::Player => Color::LightBlue,
+            Self::Enemy => Color::LightRed,
+        }
+    }
+
+    pub fn get_span(&self) -> Span<'static> {
+        match self {
+            Self::Player => self.get_text().fg(self.get_color()),
+            Self::Enemy => self.get_text().fg(self.get_color()),
+        }
+    }
+}

src/app/states/skirmish_states/structures/base.rs

@@ -4,6 +4,7 @@ use ratatui::style::Color;
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct BaseBuilding {
     durability: u16,
+    max_durability: u16,
     stress: u8,
     owner: Players,
     level: u8,
@@ -13,6 +14,7 @@ impl BaseBuilding {
     pub fn new(owner: Players) -> Self {
         Self {
             durability: 1500,
+            max_durability: 1500,
             stress: 0,
             owner,
             level: b'1',
@@ -44,6 +46,10 @@ impl Structure for BaseBuilding {
         self.durability
     }
 
+    fn get_max_durability(&self) -> u16 {
+        self.max_durability
+    }
+
     fn get_stress(&self) -> u8 {
         self.stress
     }

src/app/states/skirmish_states/structures/stone.rs

@@ -4,6 +4,7 @@ use ratatui::style::Color;
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct Stone {
     durability: u16,
+    max_durability: u16,
     stress: u8,
 }
 
@@ -11,6 +12,7 @@ impl Stone {
     pub fn new() -> Self {
         Self {
             durability: 1000,
+            max_durability: 1000,
             stress: 0,
         }
     }
@@ -33,6 +35,10 @@ impl Structure for Stone {
         self.durability
     }
 
+    fn get_max_durability(&self) -> u16 {
+        self.max_durability
+    }
+
     fn get_stress(&self) -> u8 {
         self.stress
     }

src/app/states/skirmish_states/structures/structures_enum.rs

@@ -40,6 +40,10 @@ impl Structure for Structures {
         self.structure().get_durability()
     }
 
+    fn get_max_durability(&self) -> u16 {
+        self.structure().get_max_durability()
+    }
+
     fn get_stress(&self) -> u8 {
         self.structure().get_stress()
     }

src/app/states/skirmish_states/structures/structures_trait.rs

@@ -6,5 +6,6 @@ pub trait Structure {
     fn get_level(&self) -> char;
     fn get_stress(&self) -> u8;
     fn get_durability(&self) -> u16;
+    fn get_max_durability(&self) -> u16;
     fn get_name(&self) -> &'static str;
 }

src/app/states/skirmish_states/structures/tunnel.rs

@@ -4,6 +4,7 @@ use ratatui::style::Color;
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct Tunnel {
     durability: u16,
+    max_durability: u16,
     stress: u8,
     roof_support: bool,
     rail: bool,
@@ -14,6 +15,7 @@ impl Tunnel {
     pub fn new() -> Self {
         Self {
             durability: 500,
+            max_durability: 500,
             stress: 25,
             roof_support: false,
             rail: false,
@@ -39,6 +41,10 @@ impl Structure for Tunnel {
         self.durability
     }
 
+    fn get_max_durability(&self) -> u16 {
+        self.max_durability
+    }
+
     fn get_stress(&self) -> u8 {
         self.stress
     }

src/app/views/skirmish.rs

@@ -2,7 +2,7 @@ use crate::app::{
     App,
     helpers::block_title_helper,
     keybindings::{Action, count_largest_group},
-    states::skirmish_states::{structures::Structure, units::Unit},
+    states::skirmish_states::BoardState,
     widgets::{BoardWidget, KeybindingsWidget, SidePanelWidget},
 };
 use ratatui::{
@@ -57,6 +57,7 @@ pub fn skirmish_main_area_layout(area: Rect, side_panel: bool) -> [Rect; 2] {
 
 pub fn skirmish_view(app: &App, area: Rect, buf: &mut Buffer) {
     let Some(states) = app.states() else { return };
+    let board: &BoardState = &states.skirmish.board;
 
     let [title_area, main_area, keybindings_area] = skirmish_layout(area);
 
@@ -115,33 +116,25 @@ pub fn skirmish_view(app: &App, area: Rect, buf: &mut Buffer) {
         });
         // .centered(
         //     Constraint::Length(
-        //         (states.skirmish.board.cell_width * states.skirmish.board.cols) as u16,
+        //         (board.cell_width * board.cols) as u16,
         //     ),
         //     Constraint::Length(
-        //         (states.skirmish.board.cell_height * states.skirmish.board.rows) as u16,
+        //         (board.cell_height * board.rows) as u16,
         //     ),
         // );
 
-        BoardWidget::new(&states.skirmish.board).render(cells_area, buf);
+        BoardWidget::new(&board).render(cells_area, buf);
 
         if states.skirmish.side_panel {
-            let row: usize = states.skirmish.board.get_focused_cell().get_row();
-            let col: usize = states.skirmish.board.get_focused_cell().get_col();
-            let coords: (usize, usize) = (row, col);
-            let structure_name: &str = states
-                .skirmish
-                .board
-                .get_ref_cell(row, col)
-                .get_structure()
-                .get_name();
-            let unit_name: &str = states
-                .skirmish
-                .board
-                .get_ref_cell(row, col)
-                .get_unit_option()
-                .get_name();
+            let row: usize = board.get_focused_cell().get_row();
+            let col: usize = board.get_focused_cell().get_col();
 
-            SidePanelWidget::new(coords, structure_name, unit_name).render(side_panel_area, buf);
+            SidePanelWidget::new(
+                (row, col),
+                &board.get_ref_cell(row, col).get_structure(),
+                &board.get_ref_cell(row, col).get_option_unit(),
+            )
+            .render(side_panel_area, buf);
         }
     }
 

src/app/widgets/cell.rs

@@ -56,12 +56,12 @@ impl CellWidget {
         self.structure
     }
 
-    pub fn get_unit_option(&self) -> Option<Units> {
+    pub fn get_option_unit(&self) -> Option<Units> {
         self.unit
     }
 
-    pub fn set_structure(&mut self, sctructure: Structures) -> &mut Self {
-        self.structure = sctructure;
+    pub fn set_structure(&mut self, structure: Structures) -> &mut Self {
+        self.structure = structure;
         self
     }
 

src/app/widgets/side_panel.rs

@@ -1,30 +1,31 @@
+use crate::app::{
+    helpers::block_single_title_helper,
+    states::skirmish_states::{
+        structures::{Structure, Structures},
+        units::{Unit, Units},
+    },
+};
 use ratatui::{
     buffer::Buffer,
-    layout::{Alignment, Rect},
-    style::Color,
-    text::Line,
-    widgets::{Block, BorderType, Borders, Paragraph, Widget},
+    layout::{Alignment, Constraint, Layout, Margin, Rect},
+    style::{Color, Stylize},
+    text::{Line, Span},
+    widgets::{Block, BorderType, Borders, Padding, Paragraph, Widget},
 };
 
-use crate::app::helpers::block_title_helper;
-
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub struct SidePanelWidget {
+pub struct SidePanelWidget<'a> {
     coords: (usize, usize),
-    structure_name: &'static str,
-    unit_name: &'static str,
+    structure: &'a Structures,
+    unit: &'a Option<Units>,
 }
 
-impl SidePanelWidget {
-    pub fn new(
-        coords: (usize, usize),
-        structure_name: &'static str,
-        unit_name: &'static str,
-    ) -> Self {
+impl<'a> SidePanelWidget<'a> {
+    pub fn new(coords: (usize, usize), structure: &'a Structures, unit: &'a Option<Units>) -> Self {
         Self {
             coords,
-            structure_name,
-            unit_name,
+            structure,
+            unit,
         }
     }
 
@@ -40,35 +41,94 @@ impl SidePanelWidget {
         letters.iter().rev().collect()
     }
 
-    fn get_title(&self) -> Line<'_> {
-        let cell_coords: String = format!("{}{}", self.col_to_letters(), self.coords.0);
-
-        let mut texts: Vec<(String, Color)> = Vec::with_capacity(3);
-
-        texts.push((cell_coords, Color::Yellow));
-        texts.push((self.structure_name.to_string(), Color::Cyan));
-
-        if !self.unit_name.is_empty() {
-            texts.push((self.unit_name.to_string(), Color::Green));
-        }
-
-        block_title_helper(&texts, Some(" - "))
-    }
-
-    fn get_block(&self) -> Block<'_> {
+    fn get_outer_block(&self) -> Block<'_> {
         Block::default()
             .borders(Borders::ALL)
             .border_type(BorderType::Double)
-            .title(self.get_title())
+            .title(block_single_title_helper(
+                format!("{}{}", self.col_to_letters(), self.coords.0),
+                Color::Yellow,
+            ))
             .title_alignment(Alignment::Center)
     }
+
+    fn get_inner_block<'b>(&self, title: String, color: Color) -> Block<'b> {
+        Block::default()
+            .borders(Borders::LEFT | Borders::TOP)
+            .title(block_single_title_helper(title, color))
+            .title_alignment(Alignment::Center)
+            .padding(Padding::symmetric(1, 1))
+    }
+
+    fn get_area_constraints(&self) -> [Constraint; 2] {
+        if !self.unit.get_name().is_empty() {
+            [Constraint::Percentage(50), Constraint::Percentage(50)]
+        } else {
+            [Constraint::Percentage(100), Constraint::Percentage(0)]
+        }
+    }
+
+    fn structure_text(&self) -> Vec<Line<'_>> {
+        let s: &Structures = self.structure;
+        let durability: u16 = s.get_durability();
+        let max_durability: u16 = s.get_max_durability();
+        let durability_percent: u16 = durability * 100 / max_durability;
+        let stress: u8 = s.get_stress();
+        let level: char = s.get_level();
+
+        let mut lines: Vec<Line<'_>> = vec![
+            Line::from_iter([
+                "Durability: ".gray(),
+                durability.to_string().cyan(),
+                "/".gray(),
+                max_durability.to_string().cyan(),
+                " ( ".gray(),
+                durability_percent.to_string().cyan(),
+                "% )".gray(),
+            ]),
+            Line::from_iter(["Stress: ".gray(), stress.to_string().cyan(), "%".gray()]),
+        ];
+
+        if level != ' ' {
+            lines.push(Line::from_iter([
+                "Level: ".gray(),
+                level.to_string().cyan(),
+            ]));
+        }
+
+        lines
+    }
+
+    fn unit_text(&self) -> Vec<Line<'_>> {
+        let u: &Option<Units> = self.unit;
+        let owner: Span<'_> = u.get_owner().get_span();
+
+        vec![Line::from_iter(vec!["Owner: ".gray(), owner])]
+    }
 }
 
-impl Widget for SidePanelWidget {
+impl Widget for SidePanelWidget<'_> {
     fn render(self, area: Rect, buf: &mut Buffer) {
-        Paragraph::default()
-            .alignment(Alignment::Center)
-            .block(self.get_block())
-            .render(area, buf);
+        let block: Block<'_> = self.get_outer_block();
+        let inner_area: Rect = block.inner(area).inner(Margin {
+            horizontal: 2,
+            vertical: 1,
+        });
+        block.render(area, buf);
+
+        let [structure_area, unit_area] =
+            Layout::vertical(self.get_area_constraints()).areas(inner_area);
+
+        Paragraph::new(self.structure_text())
+            .alignment(Alignment::Left)
+            .block(self.get_inner_block(self.structure.get_name().to_string(), Color::Cyan))
+            .render(structure_area, buf);
+
+        if !self.unit.get_name().is_empty() {
+            Paragraph::new(self.unit_text())
+                .alignment(Alignment::Left)
+                .block(self.get_inner_block(self.unit.get_name().to_string(), Color::Green))
+                .render(unit_area, buf);
+        }
     }
 }