add a "not fully supported" tooltip for bags that use the fallback hotbar method

src/main/java/com/trunksbomb/bagtabs/client/BagTabOverlay.java

@@ -1050,6 +1050,9 @@ public final class BagTabOverlay {
     private static List<Component> getTooltipLines(RenderedTab tab, List<BagEntry> tabs) {
         List<Component> lines = new ArrayList<>();
         lines.add(tab.entry().stack().getHoverName());
+        if (tab.entry().handler() == null) {
+            lines.add(Component.translatable("bagtabs.tooltip.hotbar_fallback").withStyle(style -> style.withItalic(true)));
+        }
         lines.add(Component.literal("Left-click: open"));
         if (tab.pinned()) {
             if (!DockConfigManager.isInteractionsLocked()) {

src/main/resources/assets/bagtabs/lang/en_us.json

@@ -5,6 +5,7 @@
   "container.bagtabs.bag": "Bag",
   "container.bagtabs.bag_namer": "Bag Namer",
   "bagtabs.tooltip.click_to_open": "Open from your inventory tabs",
+  "bagtabs.tooltip.hotbar_fallback": "This container is not fully supported",
   "bagtabs.gui.bag_namer.name": "New Name",
   "bagtabs.gui.bag_namer.placeholder": "Leave blank to clear",
   "bagtabs.gui.bag_namer.rename": "Rename",