Thomas Trompette ac0368e876 fix: eliminate workflow editing flicker on active-to-draft transitions (#21176)
## Before

https://github.com/user-attachments/assets/5108a9d8-2017-41d5-855c-98714cbd4237

## After

https://github.com/user-attachments/assets/0a78d1e1-354f-4f3f-8ec4-6f46517619e4

## Summary
- Fixes visual flickering/glitching in the workflow show page header and
canvas when editing an active workflow or discarding a draft
- Root cause: SSE events re-added discarded drafts to Apollo cache, and
multiple hook instances had independent state causing version
oscillation between DRAFT and ACTIVE
- Rewrites `useWorkflowWithCurrentVersion` with a module-level
`discardedDraftId` variable shared across all instances, Apollo cache
seeding in mutation callbacks, and `lastValidResult` caching to prevent
null renders

## Test plan
- [x] Open a workflow show page with an ACTIVE workflow
- [x] Drag a node to change position → verify no flicker, status shows
DRAFT smoothly
- [x] Discard the draft → verify header does NOT flicker between
DRAFT/ACTIVE, position resets cleanly
- [x] Click on manual trigger and edit settings → verify the edit works
(draft created, settings saved)
- [x] Repeat discard + edit cycle multiple times to confirm stability
2026-06-03 15:38:38 +00:00
2025-08-07 17:02:12 +02:00
2026-05-21 13:35:35 +02:00
2026-05-20 15:12:39 +00:00

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