fix(#290): code health — magic colors, flag params, silent catch (#353)

* fix(#290): use LocalHermesStatusColors instead of magic colors (CODE-33)

* fix(#290): replace boolean-flag params with sealed NavIcon class (CODE-37)

* fix(#290): resolve compilation errors — Color import + nullable NavIcon params

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatScreen.kt

@@ -109,6 +109,7 @@ import com.m57.hermescontrol.notification.NotificationHelper
 import com.m57.hermescontrol.theme.StatusRed
 import com.m57.hermescontrol.ui.common.EmptyState
 import com.m57.hermescontrol.ui.common.HermesScaffold
+import com.m57.hermescontrol.ui.common.NavIcon
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 
@@ -296,7 +297,7 @@ fun ChatScreen(
                 }
             }
         },
-        onOpenDrawer = onOpenDrawer,
+        navigationIcon = onOpenDrawer?.let { NavIcon.Menu(it) },
         snackbarHost = {
             SnackbarHost(snackbarHostState) { data ->
                 Snackbar(