Remove buffer mode feature and relocate cache metrics

- Remove buffer mode toggle (Normal/Large/Huge) as demuxer settings
  do not significantly impact local file playback
- Move cache duration metric from title bar to bottom status bar
- Display cache alongside codec, bitrate, and sample rate info
- Remove 'b' key binding and Buffer context menu option
- Update version to 0.1.15

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-player"
-version = "0.1.13"
+version = "0.1.15"
 edition = "2021"
 
 [dependencies]

src/main.rs

@@ -348,7 +348,7 @@ async fn handle_key_event<B: ratatui::backend::Backend>(terminal: &mut Terminal<
                 let max_items = match menu.menu_type {
                     ContextMenuType::FilePanel => 2,
                     ContextMenuType::Playlist => 2,
-                    ContextMenuType::TitleBar => 3,
+                    ContextMenuType::TitleBar => 4,
                 };
                 if menu.selected_index < max_items - 1 {
                     menu.selected_index += 1;
@@ -700,7 +700,7 @@ fn handle_mouse_event(state: &mut AppState, mouse: MouseEvent, title_bar_area: r
         let items = match menu.menu_type {
             ContextMenuType::FilePanel => 2,
             ContextMenuType::Playlist => 2,
-            ContextMenuType::TitleBar => 3,
+            ContextMenuType::TitleBar => 4,
         };
         let popup_width = 13;
         let popup_height = items as u16 + 2; // +2 for borders

src/player/mod.rs

@@ -21,6 +21,7 @@ pub struct Player {
     pub audio_codec: Option<String>,
     pub audio_bitrate: Option<f64>,
     pub sample_rate: Option<i64>,
+    pub cache_duration: Option<f64>,
 }
 
 impl Player {
@@ -62,6 +63,7 @@ impl Player {
             audio_codec: None,
             audio_bitrate: None,
             sample_rate: None,
+            cache_duration: None,
         })
     }
 
@@ -119,6 +121,7 @@ impl Player {
         self.audio_codec = None;
         self.audio_bitrate = None;
         self.sample_rate = None;
+        self.cache_duration = None;
 
         // Wait for socket to be created and mpv to be ready
         std::thread::sleep(Duration::from_millis(800));
@@ -246,6 +249,13 @@ impl Player {
                 self.is_idle = idle;
             }
         }
+
+        // Update cache duration (how many seconds are buffered ahead)
+        if let Some(val) = self.get_property("demuxer-cache-duration") {
+            self.cache_duration = val.as_f64();
+        } else {
+            self.cache_duration = None;
+        }
     }
 
     pub fn update_metadata(&mut self) {

src/ui/mod.rs

@@ -34,7 +34,7 @@ pub fn render(frame: &mut Frame, state: &mut AppState, player: &Player) -> (Rect
         .constraints([Constraint::Percentage(50), Constraint::Percentage(50)])
         .split(main_chunks[1]);
 
-    render_title_bar(frame, state, main_chunks[0]);
+    render_title_bar(frame, state, player, main_chunks[0]);
     render_file_panel(frame, state, content_chunks[0]);
     render_right_panel(frame, state, content_chunks[1]);
     render_status_bar(frame, state, player, main_chunks[2]);
@@ -147,16 +147,40 @@ fn render_file_panel(frame: &mut Frame, state: &mut AppState, area: Rect) {
             // Only show selection bar when file panel has focus
             let is_selected = !state.focus_playlist && idx == state.selected_index;
 
-            // Add folder icon for directories
+            // Add icon for directories and files
             let icon = if item.node.is_dir {
+                let is_expanded = state.expanded_dirs.contains(&item.node.path);
+                // Nerd font folder icons: \u{eaf7} = open, \u{ea83} = closed
+                let icon_char = if is_expanded { "\u{eaf7}  " } else { "\u{ea83}  " };
+
                 // Bold black icon on selection bar, blue otherwise
                 if is_selected {
-                    Span::styled("▸ ", Style::default().fg(Theme::background()).add_modifier(Modifier::BOLD))
+                    Span::styled(icon_char, Style::default().fg(Theme::background()).add_modifier(Modifier::BOLD))
                 } else {
-                    Span::styled("▸ ", Style::default().fg(Theme::highlight()))
+                    Span::styled(icon_char, Style::default().fg(Theme::highlight()))
                 }
             } else {
-                Span::raw("  ")
+                // File icons based on extension
+                let extension = item.node.path.extension()
+                    .and_then(|e| e.to_str())
+                    .unwrap_or("")
+                    .to_lowercase();
+
+                let (icon_char, color) = match extension.as_str() {
+                    // Audio files - music note icon
+                    "mp3" | "flac" | "wav" | "ogg" | "m4a" | "aac" | "wma" | "opus" =>
+                        ("\u{f0e2a}  ", Theme::success()), //
+                    // Video files - film icon
+                    "mp4" | "mkv" | "avi" | "mov" | "webm" | "flv" | "wmv" | "m4v" =>
+                        ("\u{f1c8}  ", Theme::warning()), //
+                    _ => ("   ", Theme::foreground()),
+                };
+
+                if is_selected {
+                    Span::styled(icon_char, Style::default().fg(Theme::background()).add_modifier(Modifier::BOLD))
+                } else {
+                    Span::styled(icon_char, Style::default().fg(color))
+                }
             };
             let name_spans = if in_search && !search_query.is_empty() {
                 highlight_search_matches(&item.node.name, &search_query, is_selected)
@@ -201,20 +225,13 @@ fn render_file_panel(frame: &mut Frame, state: &mut AppState, area: Rect) {
         items.push(more_item);
     }
 
-    let title_style = if !state.focus_playlist {
-        // File panel has focus - bold title
-        Theme::title_style().add_modifier(Modifier::BOLD)
-    } else {
-        Theme::title_style()
-    };
-
     let list = List::new(items)
         .block(
             Block::default()
                 .borders(Borders::ALL)
-                .title("Media Files")
+                .title("files")
                 .style(Theme::widget_border_style())
-                .title_style(title_style),
+                .title_style(Theme::title_style()),
         );
 
     let mut list_state = ListState::default();
@@ -311,16 +328,9 @@ fn render_right_panel(frame: &mut Frame, state: &mut AppState, area: Rect) {
     }
 
     let playlist_title = if !state.playlist.is_empty() {
-        format!("Playlist [{}/{}]", state.playlist_index + 1, state.playlist.len())
+        format!("playlist [{}/{}]", state.playlist_index + 1, state.playlist.len())
     } else {
-        "Playlist (empty)".to_string()
-    };
-
-    let playlist_title_style = if state.focus_playlist {
-        // Playlist has focus - bold title
-        Theme::title_style().add_modifier(Modifier::BOLD)
-    } else {
-        Theme::title_style()
+        "playlist (empty)".to_string()
     };
 
     let playlist_widget = List::new(playlist_items)
@@ -329,7 +339,7 @@ fn render_right_panel(frame: &mut Frame, state: &mut AppState, area: Rect) {
                 .borders(Borders::ALL)
                 .title(playlist_title)
                 .style(Theme::widget_border_style())
-                .title_style(playlist_title_style),
+                .title_style(Theme::title_style()),
         );
 
     let mut playlist_state = ListState::default();
@@ -339,7 +349,7 @@ fn render_right_panel(frame: &mut Frame, state: &mut AppState, area: Rect) {
     frame.render_stateful_widget(playlist_widget, area, &mut playlist_state);
 }
 
-fn render_title_bar(frame: &mut Frame, state: &AppState, area: Rect) {
+fn render_title_bar(frame: &mut Frame, state: &AppState, _player: &Player, area: Rect) {
     let background_color = match state.player_state {
         PlayerState::Playing => Theme::success(),     // Green for playing
         PlayerState::Paused => Theme::highlight(),    // Blue for paused
@@ -511,7 +521,7 @@ fn render_status_bar(frame: &mut Frame, state: &AppState, player: &Player, area:
             left_parts.push(title.clone());
         }
 
-        // Right side: Bitrate | Codec | Sample rate
+        // Right side: Bitrate | Codec | Sample rate | Cache
         if let Some(bitrate) = player.audio_bitrate {
             right_parts.push(format!("{:.0} kbps", bitrate));
         }
@@ -524,6 +534,12 @@ fn render_status_bar(frame: &mut Frame, state: &AppState, player: &Player, area:
             right_parts.push(format!("{} Hz", samplerate));
         }
 
+        if let Some(cache_dur) = player.cache_duration {
+            if cache_dur > 0.0 {
+                right_parts.push(format!("Cache:{:.1}s", cache_dur));
+            }
+        }
+
         // Create layout for left and right sections
         let chunks = Layout::default()
             .direction(Direction::Horizontal)