feat: Add Settings page and refactor view navigation

src/app/mod.rs

@@ -14,6 +14,13 @@ use tokio::sync::Mutex;
 
 static UI_RX: OnceLock<Mutex<Option<tokio::sync::mpsc::Receiver<UiEvent>>>> = OnceLock::new();
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Screen {
+    Home,
+    Room,
+    Settings,
+}
+
 #[derive(Debug, Clone)]
 pub enum AppMessage {
     NicknameChanged(String),
@@ -31,6 +38,8 @@ pub enum AppMessage {
     InputDeviceChanged(String),
     OutputDeviceChanged(String),
     EventOccurred(Event),
+    NavigateToSettings,
+    NavigateBack,
 }
 
 fn core_subscription() -> impl iced::futures::Stream<Item = UiEvent> {
@@ -65,6 +74,7 @@ pub struct AppState {
     peer_volumes: HashMap<EndpointId, f32>,
     audio_levels: HashMap<EndpointId, f32>,
     controller: Arc<CoreController>,
+    current_screen: Screen,
 }
 
 impl Default for AppState {
@@ -91,6 +101,7 @@ impl Default for AppState {
             peer_volumes: HashMap::new(),
             audio_levels: HashMap::new(),
             controller,
+            current_screen: Screen::Home,
         }
     }
 }
@@ -161,15 +172,15 @@ fn update(state: &mut AppState, message: AppMessage) -> Task<AppMessage> {
                 UiEvent::RoomJoined { ticket, self_id } => {
                     state.ticket = ticket;
                     state.self_id = self_id;
-                    state.status_message = "Connected to room".to_string();
-                    state.peers.clear();
-                    state.audio_levels.clear();
+                    state.status_message = "Connected".to_string();
+                    state.current_screen = Screen::Room;
                 }
                 UiEvent::RoomLeft => {
                     state.ticket = "".to_string();
                     state.peers.clear();
                     state.audio_levels.clear();
                     state.status_message = "Ready to connect".to_string();
+                    state.current_screen = Screen::Home;
                 }
                 UiEvent::PeerJoined { id, state: peer_state } => {
                     state.peers.insert(id, peer_state);
@@ -229,6 +240,16 @@ fn update(state: &mut AppState, message: AppMessage) -> Task<AppMessage> {
             }
         }
         AppMessage::EventOccurred(_) => {}
+        AppMessage::NavigateToSettings => {
+            state.current_screen = Screen::Settings;
+        }
+        AppMessage::NavigateBack => {
+            if state.ticket.is_empty() {
+                state.current_screen = Screen::Home;
+            } else {
+                state.current_screen = Screen::Room;
+            }
+        }
     }
     Task::none()
 }
@@ -303,7 +324,43 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
         }
     };
 
-    if state.ticket.is_empty() {
+    let top_bar = row![
+        horizontal_space(),
+        button(text("⚙ Settings").size(14))
+            .on_press(AppMessage::NavigateToSettings)
+            .style(b_style(color_surface, color_blue, color_text, 6.0))
+            .padding(8)
+    ].width(iced::Length::Fill).padding(10);
+
+    if state.current_screen == Screen::Settings {
+        let content = column![
+            text("Settings").size(32).color(color_text),
+            vertical_space(20.0),
+            text("Future settings and controls will be added here.").size(16).color(color_subtext),
+            vertical_space(40.0),
+            button(
+                text("Back")
+                    .size(16)
+                    .align_x(iced::alignment::Horizontal::Center)
+            )
+            .on_press(AppMessage::NavigateBack)
+            .style(b_style(color_surface, color_blue, color_text, 8.0))
+            .padding(14)
+            .width(iced::Length::Fixed(150.0))
+        ]
+        .align_x(iced::alignment::Horizontal::Center)
+        .spacing(10);
+
+        return container(content)
+            .width(iced::Length::Fill)
+            .height(iced::Length::Fill)
+            .center_x(iced::Length::Fill)
+            .center_y(iced::Length::Fill)
+            .style(c_style(color_crust, Color::TRANSPARENT, 0.0))
+            .into();
+    }
+
+    if state.current_screen == Screen::Home {
         // --- HOME SCREEN ---
         let logo = text("PEERSPEAK")
             .size(36)
@@ -384,11 +441,15 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
         .padding(30)
         .width(420);
 
-        container(content)
+        container(
+            column![
+                top_bar,
+                vertical_space(40.0),
+                content
+            ].align_x(iced::alignment::Horizontal::Center)
+        )
             .width(iced::Length::Fill)
             .height(iced::Length::Fill)
-            .align_x(iced::alignment::Horizontal::Center)
-            .align_y(iced::alignment::Vertical::Center)
             .style(c_style(color_crust, Color::TRANSPARENT, 0.0))
             .into()
     } else {
@@ -569,6 +630,7 @@ fn view(state: &AppState) -> Element<'_, AppMessage> {
 
         container(
             column![
+                top_bar,
                 header_container,
                 vertical_space(15.0),
                 main_layout