fix: add missing mocks for useToast and useSharedWorkflowUrlLoader in persistence tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/platform/workflow/persistence/composables/useWorkflowPersistenceV2.test.ts

@@ -33,6 +33,21 @@ vi.mock('primevue', () => ({
   })
 }))
 
+vi.mock('primevue/usetoast', () => ({
+  useToast: () => ({
+    add: mockToastAdd
+  })
+}))
+
+vi.mock(
+  '@/platform/workflow/sharing/composables/useSharedWorkflowUrlLoader',
+  () => ({
+    useSharedWorkflowUrlLoader: () => ({
+      loadSharedWorkflowFromUrl: vi.fn().mockResolvedValue('not-present')
+    })
+  })
+)
+
 vi.mock('vue-i18n', async (importOriginal) => {
   const actual = await importOriginal<typeof I18n>()
   return {