refactor(gui): refactor draw_hotkeys to improve code health (#86)

- Break down the monolithic `draw_hotkeys` method into smaller,
  focused component functions: `draw_hotkeys_header`,
  `draw_hotkeys_search`, `draw_hotkeys_table`, and
  `handle_hotkey_action`.
- Improve readability and maintainability of the `src/gui/draw.rs` file
  while preserving identical behavior.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

src/gui/draw.rs

@@ -137,7 +137,22 @@ impl SoundpadGui {
         ui.vertical(|ui| {
             ui.spacing_mut().item_spacing.y = 5.0;
 
-            // --- Header ---
+            self.draw_hotkeys_header(ui);
+            ui.separator();
+
+            self.draw_hotkeys_search(ui);
+            ui.separator();
+            ui.add_space(5.0);
+
+            let action = self.draw_hotkeys_table(ui);
+
+            if let Some(action) = action {
+                self.handle_hotkey_action(action);
+            }
+        });
+    }
+
+    fn draw_hotkeys_header(&mut self, ui: &mut Ui) {
         ui.horizontal(|ui| {
             let back_button = Button::new(ICON_ARROW_BACK).frame(false);
             if ui.add(back_button).clicked() {
@@ -148,10 +163,9 @@ impl SoundpadGui {
                 ui.label(RichText::new("Hotkeys").color(Color32::WHITE).monospace());
             });
         });
+    }
 
-            ui.separator();
-
-            // --- Search and Add Command ---
+    fn draw_hotkeys_search(&mut self, ui: &mut Ui) {
         ui.horizontal(|ui| {
             ui.menu_button(format!("{} Add Command", ICON_ADD.codepoint), |ui| {
                 let mut selected_cmd = None;
@@ -190,10 +204,9 @@ impl SoundpadGui {
                     .desired_width(f32::INFINITY),
             );
         });
+    }
 
-            ui.separator();
-            ui.add_space(5.0);
-
+    fn draw_hotkeys_table(&mut self, ui: &mut Ui) -> Option<HotkeyAction> {
         let conflicts = self.app_state.hotkey_config.find_conflicts();
         let conflict_slots: std::collections::HashSet<&str> =
             conflicts.into_iter().flat_map(|(a, b)| [a, b]).collect();
@@ -380,7 +393,10 @@ impl SoundpadGui {
                 }
             });
 
-            if let Some(action) = action {
+        action
+    }
+
+    fn handle_hotkey_action(&mut self, action: HotkeyAction) {
         match action {
             HotkeyAction::Remove(slot) => {
                 make_request_async(Request::clear_hotkey(&slot));
@@ -399,8 +415,6 @@ impl SoundpadGui {
             }
         }
     }
-        });
-    }
 
     fn draw_header(&mut self, ui: &mut Ui) {
         ui.vertical_centered_justified(|ui| {