I can persist tabmanager state

src/app.py

@@ -5,7 +5,8 @@ from fasthtml.components import *
 
 from myfasthtml.controls.Layout import Layout
 from myfasthtml.controls.TabsManager import TabsManager
-from myfasthtml.controls.helpers import Ids
+from myfasthtml.controls.helpers import Ids, mk
+from myfasthtml.core.commands import Command
 from myfasthtml.core.instances import InstancesManager
 from myfasthtml.myfastapp import create_app
 
@@ -30,11 +31,14 @@ def index(session):
   for i in range(1000):
     layout.left_drawer.append(Div(f"Left Drawer Item {i}"))
   
-  tabs_manager = InstancesManager.get(session, Ids.TabsManager, TabsManager)
-  tabs_manager.add_tab("Users", Div("Content 1"))
-  tabs_manager.add_tab("Users", Div("Content 2"))
-  tabs_manager.add_tab("Users", Div("Content 3"))
+  tabs_manager = TabsManager(session, _id="main")
+  btn = mk.button("Add Tab",
+                  command=Command("AddTab",
+                                  "Add a new tab",
+                                  tabs_manager.on_new_tab, "Tabs", Div("Content")).
+                  htmx(target=f"#{tabs_manager.get_id()}"))
   layout.set_main(tabs_manager)
+  layout.set_footer(btn)
   return layout