feat: add accordion overlay controls and icon API

src-tauri/src/app_state.rs

@@ -1,5 +1,6 @@
 use crate::countdown::events::AppEvent;
 use crate::countdown::service::CountdownService;
+use std::collections::HashMap;
 use tokio::sync::broadcast;
 
 #[derive(Clone, Debug)]
@@ -28,11 +29,30 @@ impl ClockAnchor {
         }
     }
 }
+
+#[derive(Debug, Clone)]
+pub struct OverlayConfig {
+    pub icon: String,
+    pub text_color: String,
+    pub bg_color: String,
+}
+
+impl Default for OverlayConfig {
+    fn default() -> Self {
+        Self {
+            icon: String::new(),
+            text_color: "white".to_string(),
+            bg_color: "transparent".to_string(),
+        }
+    }
+}
+
 #[derive(Debug)]
 pub struct AppState {
     pub clock_anchor: ClockAnchor,
     pub countdown_service: CountdownService,
     pub event_bus: broadcast::Sender<AppEvent>,
+    pub overlay_configs: tokio::sync::Mutex<HashMap<u64, OverlayConfig>>,
 }
 
 impl AppState {
@@ -42,6 +62,7 @@ impl AppState {
             clock_anchor: ClockAnchor::new(),
             countdown_service: CountdownService::new(),
             event_bus,
+            overlay_configs: tokio::sync::Mutex::new(HashMap::new()),
         }
     }
 }