Remove unused code and fix compiler warnings

src/player/mod.rs

@@ -130,11 +130,6 @@ impl Player {
         Ok(())
     }
 
-    pub fn stop(&mut self) -> Result<()> {
-        self.send_command("stop", &[])?;
-        self.is_idle = true;
-        Ok(())
-    }
 
     pub fn set_volume(&mut self, volume: i64) -> Result<()> {
         self.send_command("set_property", &[json!("volume"), json!(volume)])?;
@@ -179,10 +174,6 @@ impl Player {
         Some(self.duration)
     }
 
-    pub fn is_playing(&self) -> bool {
-        !self.is_paused && !self.is_idle
-    }
-
     pub fn is_idle(&self) -> bool {
         self.is_idle
     }

src/state/mod.rs

@@ -39,7 +39,6 @@ pub struct AppState {
 pub struct FlattenedItem {
     pub node: FileTreeNode,
     pub depth: usize,
-    pub is_expanded: bool,
 }
 
 impl AppState {
@@ -120,20 +119,6 @@ impl AppState {
         self.flattened_items.get(self.selected_index)
     }
 
-    pub fn toggle_expand(&mut self) {
-        if let Some(item) = self.get_selected_item() {
-            if item.node.is_dir {
-                let path = item.node.path.clone();
-                if self.expanded_dirs.contains(&path) {
-                    self.expanded_dirs.remove(&path);
-                } else {
-                    self.expanded_dirs.insert(path);
-                }
-                self.rebuild_flattened_items();
-            }
-        }
-    }
-
     pub fn collapse_selected(&mut self) {
         if let Some(item) = self.get_selected_item() {
             if item.node.is_dir {
@@ -167,10 +152,6 @@ impl AppState {
         }
     }
 
-    pub fn clear_marks(&mut self) {
-        self.marked_files.clear();
-    }
-
     pub fn clear_playlist(&mut self) {
         self.playlist.clear();
         self.playlist_index = 0;
@@ -469,7 +450,6 @@ fn flatten_tree(nodes: &[FileTreeNode], depth: usize, expanded_dirs: &HashSet<Pa
         result.push(FlattenedItem {
             node: node.clone(),
             depth,
-            is_expanded,
         });
 
         if node.is_dir && !node.children.is_empty() && is_expanded {

src/ui/theme.rs

@@ -34,19 +34,7 @@ impl Theme {
         Color::Rgb(215, 175, 95) // #d7af5f
     }
 
-    pub fn normal_red() -> Color {
-        Color::Rgb(215, 84, 0) // #d75400
-    }
-
-    pub fn normal_cyan() -> Color {
-        Color::Rgb(160, 160, 160) // #a0a0a0
-    }
-
     // Semantic mappings
-    pub fn primary_text() -> Color {
-        Color::Rgb(238, 238, 238) // #eeeeee
-    }
-
     pub fn secondary_text() -> Color {
         Self::foreground()
     }
@@ -75,10 +63,6 @@ impl Theme {
         Self::normal_yellow()
     }
 
-    pub fn error() -> Color {
-        Self::normal_red()
-    }
-
     // Styles
     pub fn widget_border_style() -> Style {
         Style::default().fg(Self::border()).bg(Self::background())