test: update test names to reflect as-const refactor

Rename "enum" to "constant" in two test descriptors to match the refactor
in the parent commit:

- "should export CreateButtonType enum" -> "...constant"
- describe("Enum Exports") -> describe("Constant Exports")

Keeps test names truthful; neighboring test already uses the "constant"
phrasing (see "should export DEFAULT_METHOD constant"). No behavior change.

Co-authored-by: Claude <noreply@anthropic.com>

Author: jeanibarz

web/app/components/plugins/plugin-detail-panel/subscription-list/create/__tests__/index.spec.tsx

@@ -1437,7 +1437,7 @@ describe('CreateSubscriptionButton', () => {
 
   // ==================== Export Verification ====================
   describe('Export Verification', () => {
-    it('should export CreateButtonType enum', () => {
+    it('should export CreateButtonType constant', () => {
       // Assert
       expect(CreateButtonType.FULL_BUTTON).toBe('full-button')
       expect(CreateButtonType.ICON_BUTTON).toBe('icon-button')

web/app/components/plugins/plugin-detail-panel/subscription-list/create/hooks/__tests__/use-oauth-client-state.spec.ts

@@ -714,7 +714,7 @@ describe('useOAuthClientState', () => {
   })
 })
 
-describe('Enum Exports', () => {
+describe('Constant Exports', () => {
   it('should export AuthorizationStatusEnum', () => {
     expect(AuthorizationStatusEnum.Pending).toBe('pending')
     expect(AuthorizationStatusEnum.Success).toBe('success')