feat(data-process): 完善后台生成与失败重试

design-qa.md

@@ -328,6 +328,57 @@ final result: blocked
 
 ---
 
+# Failed Result Regeneration Design QA
+
+## Evidence
+
+- Source visual truth: `/var/folders/nk/yks07zp14wb4rv3jqq0pt_4h0000gn/T/codex-clipboard-0c2e6f90-aaac-4817-9084-bc31496aed0a.png`.
+- Implementation route: `http://localhost:16801/data-process/:id/workflow`, step 6.
+- Browser evidence: `/Users/caoxiaozhu/.codex/visualizations/2026/07/27/019fa277-626b-76a1-af02-48948d66c7ec/data-process-empty-list.png`.
+- Viewport: 1280 × 720.
+- Target state: a completed task on step 6 with a selected invalid result.
+- Available browser state: authenticated data-process list with zero tasks; no representative invalid result could be opened without creating or mutating local business data.
+
+## Static and automated evidence
+
+- Invalid results render a primary plain `重新生成` button in the right side of the result header.
+- Valid results keep the existing `恢复生成结果` action.
+- While regeneration is running, the selected row shows a spinner, the button shows loading, editors are disabled, and the footer confirmation action is disabled.
+- A successful response replaces only the selected row in place; a failed second generation leaves the original invalid row untouched.
+- `regression-data-process-wizard.mjs`: passed.
+- `regression-data-process-detail.mjs`: passed.
+- `regression-data-process-list.mjs`: passed.
+- `vue-tsc -b --noEmit`: passed.
+- Relevant backend tests: 97 passed, with one third-party deprecation warning.
+
+## Required fidelity surfaces
+
+- Typography and hierarchy: the action uses the existing Element Plus small-button hierarchy and remains secondary to result content.
+- Spacing and layout rhythm: the action is placed in the existing flex header's right action slot, matching the source location.
+- Colors and tokens: the action uses the existing product primary color and existing Font Awesome refresh icon.
+- Copy and content: the visible label is exactly `重新生成`; only server-saved invalid results expose it.
+- Interaction: optimistic concurrency protects against overwriting a newer edit, and persistence happens only after the replacement passes generation and quality validation.
+
+## Findings
+
+- [P2] Representative rendered comparison unavailable
+  Location: step 6 result header with an invalid result selected.
+  Evidence: the authenticated local database currently contains zero data-processing tasks, so the target state cannot be reached without creating test business data or invoking the configured model.
+  Impact: automated and static checks prove the contract and placement, but cannot prove pixel-level spacing against the supplied screenshot.
+  Fix: open any existing failed result after one is available, capture the same 1280 × 720 state, and compare it side by side with the source screenshot.
+
+## Comparison history
+
+### Iteration 1 — blocked
+
+- Source screenshot was inspected and the implementation was aligned to its existing right-header action slot.
+- Local login and list navigation succeeded.
+- The target result state was unavailable because the local task list was empty.
+
+final result: blocked
+
+---
+
 # Dataset Version Actions Design QA
 
 ## Evidence