refactor(web): unify settings panel layouts with shared toolbar/body

- Add PanelToolbar/PanelBody primitives so all four settings tabs share
  the same top-toolbar + scrollable-body rhythm under the unified header.
- API panel: drop the heavy gray shadowed TabsList; move the create
  action into the toolbar next to the tabs, lighten per-tab hints.
- Storage panel: reuse PanelToolbar for the generated-at/refresh bar.
- Account panel: wrap content in PanelBody for consistent padding.
- Models panel: keep the pinned LangBot Models (Space) card at the very
  top, above the add-custom-provider row (intentional pin), using
  PanelBody instead of a top toolbar.

web/src/app/home/bots/components/bot-form/RoutingRulesEditor.tsx

@@ -48,7 +48,6 @@ interface PipelineOption {
 }
 
 interface RoutingRulesEditorProps {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   form: UseFormReturn<any>;
   pipelineNameList: PipelineOption[];
 }