fix: change dispatcher_get_state to avoid stack copy of AppState

Co-authored-by: aider (deepseek/deepseek-coder) <aider@aider.chat>

dispatcher.c

@@ -111,11 +111,10 @@ static void notify_subscribers(AppState *state) {
 // State access
 // ============================================================
 
-AppState dispatcher_get_state(void) {
+void dispatcher_get_state(AppState *out) {
     pthread_mutex_lock(&dispatcher.state_mutex);
-    AppState state = dispatcher.state;
+    *out = dispatcher.state;
     pthread_mutex_unlock(&dispatcher.state_mutex);
-    return state;
 }
 
 // ============================================================