fix: add detailed diagnostics to saveAndWait for CI debugging

Return evalResult from page.evaluate showing oldPath, newPath,
wasTemporary, afterPath, afterSize, afterIsTemporary to understand
why save appears to complete but workflow state doesn't update.

browser_tests/tests/dialogs/shareWorkflowDialog.spec.ts

@@ -142,10 +142,13 @@ async function saveAndWait(
   )
 
   // Save directly via store methods, bypassing UI interactions.
-  await comfyPage.page.evaluate(async (name: string) => {
+  const evalResult = await comfyPage.page.evaluate(async (name: string) => {
     const store = (window.app!.extensionManager as WorkspaceStore).workflow
     const workflow = store.activeWorkflow
-    if (!workflow) throw new Error('No active workflow to save')
+    if (!workflow) return { error: 'No active workflow' }
+
+    const wasTemporary = workflow.isTemporary
+    const oldPath = workflow.path
 
     const newPath =
       workflow.directory +
@@ -158,8 +161,22 @@ async function saveAndWait(
     }
     workflow.changeTracker?.checkState()
     await store.saveWorkflow(workflow)
+
+    return {
+      oldPath,
+      newPath,
+      wasTemporary,
+      afterPath: workflow.path,
+      afterSize: workflow.size,
+      afterIsTemporary: workflow.isTemporary
+    }
   }, workflowName)
 
+  // Log diagnostics for CI debugging
+  if ('error' in evalResult) {
+    throw new Error(`saveAndWait failed: ${evalResult.error}`)
+  }
+
   // Assert workflow state to fail fast with diagnostics if save didn't take
   const state = await comfyPage.page.evaluate(() => {
     const wf = (window.app!.extensionManager as WorkspaceStore).workflow
@@ -171,13 +188,14 @@ async function saveAndWait(
       size: (wf as { size?: number } | null)?.size
     }
   })
+  const diag = JSON.stringify({ evalResult, state })
   expect(
     state.isTemporary,
-    `Workflow should be persisted after save (path=${state.path}, size=${state.size})`
+    `Workflow should be persisted after save: ${diag}`
   ).toBe(false)
   expect(
     state.isModified,
-    `Workflow should not be modified after save (path=${state.path})`
+    `Workflow should not be modified after save: ${diag}`
   ).toBe(false)
 }