fix(#134): remove settings button from chat top bar (#138)

Co-authored-by: ronia <ronia@m57>

app/src/main/java/com/m57/hermescontrol/Navigation.kt

@@ -330,12 +330,6 @@ fun MainNavigation() {
 
                         entry<ChatScreen> {
                             ChatScreenContent(
-                                onNavigateToSettings = {
-                                    // B7 (Jun 18 2026): route through
-                                    // NavigationController to prevent
-                                    // stacking duplicate entries.
-                                    NavigationController.navigateTo(SettingsScreen)
-                                },
                                 onOpenDrawer = { openDrawer() },
                             )
                         }