Move ZoomLevel into skirmish_states

Introduce Structure and Unit traits with enum wrappers.
Replace old zoom helper with ZoomLevel methods.
Update imports, BoardState, CellWidget, and CLI to use new locations.

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

@@ -1,34 +1,50 @@
+use crate::app::states::{Players, skirmish_states::structures::Structure};
 use ratatui::style::Color;
 
-use crate::app::states::Players;
-
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct BaseBuilding {
+    durability: u16,
+    stress: u8,
     owner: Players,
     level: u8,
 }
 
 impl BaseBuilding {
     pub fn new(owner: Players) -> Self {
-        Self { owner, level: b'1' }
-    }
-
-    pub fn get_tag(&self) -> char {
-        'B'
-    }
-
-    pub fn get_color(&self) -> Color {
-        match self.owner {
-            Players::Player => Color::LightBlue,
-            Players::Enemy => Color::LightRed,
+        Self {
+            durability: 1500,
+            stress: 0,
+            owner,
+            level: b'1',
         }
     }
 
     pub fn get_owner(&self) -> Players {
         self.owner
     }
+}
 
-    pub fn get_level(&self) -> char {
+impl Structure for BaseBuilding {
+    fn get_tag(&self) -> char {
+        'B'
+    }
+
+    fn get_color(&self) -> Color {
+        match self.owner {
+            Players::Player => Color::LightBlue,
+            Players::Enemy => Color::LightRed,
+        }
+    }
+
+    fn get_level(&self) -> char {
         self.level as char
     }
+
+    fn get_durability(&self) -> u16 {
+        self.durability
+    }
+
+    fn get_stress(&self) -> u8 {
+        self.stress
+    }
 }

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

@@ -1,7 +1,11 @@
 mod base;
 mod stone;
+mod structures_enum;
+mod structures_trait;
 mod tunnel;
 
 pub use base::BaseBuilding;
 pub use stone::Stone;
+pub use structures_enum::Structures;
+pub use structures_trait::Structure;
 pub use tunnel::Tunnel;

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

@@ -1,20 +1,39 @@
+use crate::app::states::skirmish_states::structures::Structure;
 use ratatui::style::Color;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct Stone {
     durability: u16,
+    stress: u8,
 }
 
 impl Stone {
     pub fn new() -> Self {
-        Self { durability: 1000 }
+        Self {
+            durability: 1000,
+            stress: 0,
+        }
     }
+}
 
-    pub fn get_tag(&self) -> char {
+impl Structure for Stone {
+    fn get_tag(&self) -> char {
         ' '
     }
 
-    pub fn get_color(&self) -> Color {
+    fn get_color(&self) -> Color {
         Color::White
     }
+
+    fn get_level(&self) -> char {
+        ' '
+    }
+
+    fn get_durability(&self) -> u16 {
+        self.durability
+    }
+
+    fn get_stress(&self) -> u8 {
+        self.stress
+    }
 }

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

@@ -0,0 +1,35 @@
+use crate::app::states::skirmish_states::structures::{BaseBuilding, Stone, Structure, Tunnel};
+use ratatui::style::Color;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Structures {
+    Base(BaseBuilding),
+    Tunnel(Tunnel),
+    Stone(Stone),
+}
+
+impl Structures {
+    pub fn get_color(&self) -> Color {
+        match self {
+            Structures::Base(b) => b.get_color(),
+            Structures::Tunnel(t) => t.get_color(),
+            Structures::Stone(s) => s.get_color(),
+        }
+    }
+
+    pub fn get_tag(&self) -> char {
+        match self {
+            Structures::Base(b) => b.get_tag(),
+            Structures::Tunnel(t) => t.get_tag(),
+            Structures::Stone(s) => s.get_tag(),
+        }
+    }
+
+    pub fn get_level(&self) -> char {
+        match self {
+            Structures::Base(b) => b.get_level(),
+            Structures::Tunnel(t) => t.get_level(),
+            Structures::Stone(s) => s.get_level(),
+        }
+    }
+}

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

@@ -0,0 +1,9 @@
+use ratatui::style::Color;
+
+pub trait Structure {
+    fn get_tag(&self) -> char;
+    fn get_color(&self) -> Color;
+    fn get_level(&self) -> char;
+    fn get_stress(&self) -> u8;
+    fn get_durability(&self) -> u16;
+}

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

@@ -1,3 +1,4 @@
+use crate::app::states::skirmish_states::structures::Structure;
 use ratatui::style::Color;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -19,20 +20,26 @@ impl Tunnel {
             lamp: false,
         }
     }
+}
 
-    pub fn get_tag(&self) -> char {
+impl Structure for Tunnel {
+    fn get_tag(&self) -> char {
         'T'
     }
 
-    pub fn get_color(&self) -> Color {
+    fn get_color(&self) -> Color {
         Color::Gray
     }
 
-    pub fn get_durability(&self) -> u16 {
+    fn get_level(&self) -> char {
+        ' '
+    }
+
+    fn get_durability(&self) -> u16 {
         self.durability
     }
 
-    pub fn get_stress(&self) -> u8 {
+    fn get_stress(&self) -> u8 {
         self.stress
     }
 }