Update formatting to use 4‑space indentation

- Adjust rustfmt.toml to set tab_spaces = 4.
- Reformat imports, struct definitions, function bodies, and match arms
  across the project to match the new style (aligned fields, added
  spacing, etc.).
- Ensure all code complies with the updated rustfmt settings.

src/app/states/skirmish_states/tasks/digging.rs

@@ -3,71 +3,71 @@ use std::collections::VecDeque;
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct DiggingTask {
-  path: VecDeque<(usize, usize)>,
-  progress: f32,
-  tick_increase: f32,
-  total_steps: usize,
+    path: VecDeque<(usize, usize)>,
+    progress: f32,
+    tick_increase: f32,
+    total_steps: usize,
 }
 
 impl DiggingTask {
-  pub fn new(path: VecDeque<(usize, usize)>, tick_increase: f32) -> Self {
-    Self {
-      total_steps: path.len(),
-      path,
-      progress: 0.0,
-      tick_increase,
+    pub fn new(path: VecDeque<(usize, usize)>, tick_increase: f32) -> Self {
+        Self {
+            total_steps: path.len(),
+            path,
+            progress: 0.0,
+            tick_increase,
+        }
     }
-  }
 
-  pub fn pop_front(&mut self) {
-    self.path.pop_front();
-    self.progress = 0.0;
-  }
-
-  pub fn from_moving(task: MovingTask, tick_increase: f32) -> Self {
-    Self {
-      path: task.get_path().clone(),
-      progress: 0.0,
-      tick_increase,
-      total_steps: task.get_total_steps(),
+    pub fn pop_front(&mut self) {
+        self.path.pop_front();
+        self.progress = 0.0;
     }
-  }
 
-  pub fn current_target(&self) -> Option<(usize, usize)> {
-    self.path.front().copied()
-  }
+    pub fn from_moving(task: MovingTask, tick_increase: f32) -> Self {
+        Self {
+            path: task.get_path().clone(),
+            progress: 0.0,
+            tick_increase,
+            total_steps: task.get_total_steps(),
+        }
+    }
+
+    pub fn current_target(&self) -> Option<(usize, usize)> {
+        self.path.front().copied()
+    }
 }
 
 impl Task for DiggingTask {
-  fn get_icon(&self) -> char {
-    '⛏'
-  }
+    fn get_icon(&self) -> char {
+        '⛏'
+    }
 
-  fn get_path(&self) -> &VecDeque<(usize, usize)> {
-    &self.path
-  }
+    fn get_path(&self) -> &VecDeque<(usize, usize)> {
+        &self.path
+    }
 
-  fn get_path_front_coords(&self) -> &(usize, usize) {
-    self.path.front().map_or(&(0, 0), |c| c)
-  }
+    fn get_path_front_coords(&self) -> &(usize, usize) {
+        self.path.front().map_or(&(0, 0), |c| c)
+    }
 
-  fn get_path_back_coords(&self) -> &(usize, usize) {
-    self.path.back().map_or(&(0, 0), |c| c)
-  }
+    fn get_path_back_coords(&self) -> &(usize, usize) {
+        self.path.back().map_or(&(0, 0), |c| c)
+    }
 
-  fn get_progress(&self) -> f32 {
-    self.progress
-  }
+    fn get_progress(&self) -> f32 {
+        self.progress
+    }
 
-  fn get_total_steps(&self) -> usize {
-    self.total_steps
-  }
+    fn get_total_steps(&self) -> usize {
+        self.total_steps
+    }
 
-  fn progress(&mut self) {
-    self.progress = (self.progress + self.tick_increase).clamp(0.0, 100.0);
-  }
+    fn progress(&mut self) {
+        self.progress = (self.progress + self.tick_increase).clamp(0.0, 100.0);
+    }
 
-  fn is_finished(&self) -> bool {
-    self.progress >= 100.0
-  }
+    fn is_finished(&self) -> bool {
+        self.progress >= 100.0
+    }
 }