feat: node-specific error tab with selection-aware grouping and error overlay (#8956)

## Summary
Enhances the error panel with node-specific views: single-node selection
shows errors grouped by message in compact mode, container nodes
(subgraph/group) expose child errors via a badge and "See Error" button,
and a floating ErrorOverlay appears after execution failure with a
deduplicated summary and quick navigation to the errors tab.

## Changes
- **Consolidate error tab**: Remove `TabError.vue`; merge all error
display into `TabErrors.vue` and drop the separate `error` tab type from
`rightSidePanelStore`
- **Selection-aware grouping**: Single-node selection regroups errors by
message (not `class_type`) and renders `ErrorNodeCard` in compact mode
- **Container node support**: Detect child-node errors in subgraph/group
nodes via execution ID prefix matching; show error badge and "See Error"
button in `SectionWidgets`
- **ErrorOverlay**: New floating card shown after execution failure with
deduplicated error messages, "Dismiss" and "See Errors" actions;
`isErrorOverlayOpen` / `showErrorOverlay` / `dismissErrorOverlay` added
to `executionStore`
- **Refactor**: Centralize error ID collection in `executionStore`
(`allErrorExecutionIds`, `hasInternalErrorForNode`); split `errorGroups`
into `allErrorGroups` (unfiltered) and `tabErrorGroups`
(selection-filtered); move `ErrorOverlay` business logic into
`useErrorGroups`

## Review Focus
- `useErrorGroups.ts`: split into `allErrorGroups` / `tabErrorGroups`
and the new `filterBySelection` parameter flow
- `executionStore.ts`: `hasInternalErrorForNode` helper and
`allErrorExecutionIds` computed
- `ErrorOverlay.vue`: integration with `executionStore` overlay state
and `useErrorGroups`

## Screenshots
<img width="853" height="461" alt="image"
src="https://github.com/user-attachments/assets/a49ab620-4209-4ae7-b547-fba13da0c633"
/>
<img width="854" height="203" alt="image"
src="https://github.com/user-attachments/assets/c119da54-cd78-4e7a-8b7a-456cfd348f1d"
/>
<img width="497" height="361" alt="image"
src="https://github.com/user-attachments/assets/74b16161-cf45-454b-ae60-24922fe36931"
/>

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: github-actions <github-actions@github.com>

browser_tests/tests/dialog.spec.ts

@@ -61,16 +61,21 @@ test('Does not report warning on undo/redo', async ({ comfyPage }) => {
 })
 
 test.describe('Execution error', () => {
+  test.beforeEach(async ({ comfyPage }) => {
+    await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
+    await comfyPage.setup()
+  })
+
   test('Should display an error message when an execution error occurs', async ({
     comfyPage
   }) => {
     await comfyPage.workflow.loadWorkflow('nodes/execution_error')
-    await comfyPage.queueButton.click()
+    await comfyPage.command.executeCommand('Comfy.QueuePrompt')
     await comfyPage.nextFrame()
 
-    // Wait for the element with the .comfy-execution-error selector to be visible
-    const executionError = comfyPage.page.locator('.comfy-error-report')
-    await expect(executionError).toBeVisible()
+    // Wait for the error overlay to be visible
+    const errorOverlay = comfyPage.page.locator('[data-testid="error-overlay"]')
+    await expect(errorOverlay).toBeVisible()
   })
 })
 

browser_tests/tests/execution.spec.ts

@@ -7,22 +7,29 @@ test.beforeEach(async ({ comfyPage }) => {
 })
 
 test.describe('Execution', { tag: ['@smoke', '@workflow'] }, () => {
+  test.beforeEach(async ({ comfyPage }) => {
+    await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
+    await comfyPage.setup()
+  })
+
   test(
     'Report error on unconnected slot',
     { tag: '@screenshot' },
     async ({ comfyPage }) => {
       await comfyPage.canvasOps.disconnectEdge()
-      await comfyPage.canvasOps.clickEmptySpace()
+      await comfyPage.page.keyboard.press('Escape')
 
       await comfyPage.command.executeCommand('Comfy.QueuePrompt')
-      await expect(comfyPage.page.locator('.comfy-error-report')).toBeVisible()
+      await expect(
+        comfyPage.page.locator('[data-testid="error-overlay"]')
+      ).toBeVisible()
       await comfyPage.page
-        .locator('.p-dialog')
-        .getByRole('button', { name: 'Close' })
+        .locator('[data-testid="error-overlay"]')
+        .getByRole('button', { name: 'Dismiss' })
         .click()
-      await comfyPage.page.locator('.comfy-error-report').waitFor({
-        state: 'hidden'
-      })
+      await comfyPage.page
+        .locator('[data-testid="error-overlay"]')
+        .waitFor({ state: 'hidden' })
       await expect(comfyPage.canvas).toHaveScreenshot(
         'execution-error-unconnected-slot.png'
       )