refactor: Split large draw.rs into modular views (#113)

Replaced the monolithic `src/gui/draw.rs` with a new `src/gui/views` directory module.
The GUI drawing logic is now cleanly separated into distinct files:
- `body.rs`
- `footer.rs`
- `header.rs`
- `hotkey_capture.rs`
- `hotkeys.rs`
- `settings.rs`
- `waiting_for_daemon.rs`

This organization vastly improves readability and maintainability without altering functionality. All shared helpers are centralized in `src/gui/views/mod.rs` and imports are strictly managed.

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

src/gui/views/mod.rs

@@ -0,0 +1,32 @@
+use crate::gui::SoundpadGui;
+use egui::Ui;
+use egui_material_icons::icons::*;
+
+mod body;
+mod footer;
+mod header;
+mod hotkey_capture;
+mod hotkeys;
+mod settings;
+mod waiting_for_daemon;
+
+impl SoundpadGui {
+    pub(crate) fn get_volume_icon(volume: f32) -> &'static str {
+        if volume > 0.7 {
+            ICON_VOLUME_UP.codepoint
+        } else if volume <= 0.0 {
+            ICON_VOLUME_OFF.codepoint
+        } else if volume < 0.3 {
+            ICON_VOLUME_MUTE.codepoint
+        } else {
+            ICON_VOLUME_DOWN.codepoint
+        }
+    }
+
+    pub fn draw(&mut self, ui: &mut Ui) {
+        self.draw_header(ui);
+        self.draw_body(ui);
+        ui.separator();
+        self.draw_footer(ui);
+    }
+}