test(ui): strengthen disabled cursor assertions and fix linting

frontend/src/components/ui/button.test.tsx

@@ -23,9 +23,7 @@ describe("Button component", () => {
     render(<Button disabled>Disabled Button</Button>)
     const button = screen.getByRole("button", { name: /disabled button/i })
     expect(button).toBeDisabled()
-    // It should have cursor-pointer but also disabled:pointer-events-none 
-    // which prevents the cursor from changing. 
-    // We can also add disabled:cursor-default for clarity.
     expect(button).toHaveClass("disabled:pointer-events-none")
+    expect(button).toHaveClass("disabled:cursor-default")
   })
 })

frontend/src/components/ui/dropdown-menu.test.tsx

@@ -2,7 +2,6 @@ import { render, screen } from "@testing-library/react"
 import { describe, expect, it } from "vitest"
 import { 
   DropdownMenu, 
-  DropdownMenuTrigger, 
   DropdownMenuContent, 
   DropdownMenuItem, 
   DropdownMenuSub,
@@ -41,7 +40,7 @@ describe("DropdownMenu components", () => {
     expect(trigger).toHaveClass("cursor-pointer")
   })
 
-  it("DropdownMenuItem should not have cursor-pointer behavior when disabled", () => {
+  it("DropdownMenuItem should show default cursor when disabled", () => {
     render(
       <DropdownMenu open={true}>
         <DropdownMenuContent>
@@ -52,8 +51,24 @@ describe("DropdownMenu components", () => {
     const item = screen.getByText("Disabled Item")
     // Radix sets data-disabled attribute
     expect(item).toHaveAttribute("data-disabled")
-    // If pointer-events-none is missing, we check for cursor class
-    // We expect the final class to have disabled:cursor-default or similar,
-    // or rely on pointer-events-none to block interactions.
+    expect(item).toHaveClass("data-[disabled]:cursor-default")
+  })
+
+  it("DropdownMenuSubTrigger should show default cursor when disabled", () => {
+    render(
+      <DropdownMenu open={true}>
+        <DropdownMenuContent>
+          <DropdownMenuSub>
+            <DropdownMenuSubTrigger disabled>Disabled Sub Trigger</DropdownMenuSubTrigger>
+            <DropdownMenuPortal>
+              <DropdownMenuSubContent />
+            </DropdownMenuPortal>
+          </DropdownMenuSub>
+        </DropdownMenuContent>
+      </DropdownMenu>
+    )
+    const trigger = screen.getByText("Disabled Sub Trigger")
+    expect(trigger).toHaveAttribute("data-disabled")
+    expect(trigger).toHaveClass("data-[disabled]:cursor-default")
   })
 })