test(frontend): update form primitive tests for admin input usage

frontend/src/components/input/FormField.test.ts

@@ -233,8 +233,7 @@ describe('FormField', () => {
 			},
 		})
 		const label = wrapper.find('label.two-col')
-		// for would point to a different id than the slotted control generates,
-		// so omit it entirely and rely on the label wrapping the control.
+		// for="" would mismatch the slotted control's id; rely on the label wrapping instead.
 		expect(label.attributes('for')).toBeUndefined()
 		expect(label.find('input').exists()).toBe(true)
 	})

frontend/src/components/input/FormSelect.test.ts

@@ -155,9 +155,7 @@ describe('FormSelect', () => {
 			},
 		})
 		const select = wrapper.find('select')
-		// Without an explicit value binding, the native select defaults to the
-		// first option. If the component forced :value="undefined" that default
-		// would be broken.
+		// Forcing :value="undefined" would break the native default-to-first-option behavior.
 		expect((select.element as HTMLSelectElement).value).toBe('')
 	})