feat: refine metadata catalog workflows

frontend/src/shell/database-management/FleetActionSelector.test.tsx

@@ -15,6 +15,19 @@ const actions = [
   },
 ] as const;
 
+test("disables the picker when no rows are selected", () => {
+  render(
+    <FleetActionSelector
+      actions={actions}
+      selectedCount={0}
+      onRun={vi.fn()}
+      onClear={vi.fn()}
+    />,
+  );
+
+  expect(screen.getByRole("combobox", { name: "Batch action" })).toBeDisabled();
+});
+
 test("keeps unavailable commands discoverable and explains why Run is disabled", async () => {
   const user = userEvent.setup();
   render(
@@ -50,6 +63,7 @@ test("runs an enabled command explicitly and resets the picker", async () => {
   await user.selectOptions(picker, "sync");
   expect(screen.getByText("All tables in this database")).toBeVisible();
   expect(screen.getByText("Action scope")).toBeVisible();
+  expect(screen.getByRole("button", { name: "Run action" })).toHaveClass("bg-destructive");
   await user.click(screen.getByRole("button", { name: "Run action" }));
 
   expect(onRun).toHaveBeenCalledWith("sync");