## Summary
This PR fixes the remaining FE-367 workflow persistence gap by moving
the workflow draft lifecycle callers from the legacy V1 draft store to
`workflowDraftStoreV2`, following the core design from #10367 while
omitting unrelated changes.
It keeps the change focused on saved workflow tab restore and V2 draft
lifecycle behavior:
- save active workflow drafts through V2 before loading a new graph
- load, save, save-as, close, rename, and delete workflows against V2
draft storage
- prefer a fresh V2 draft when loading a saved workflow, and discard
stale drafts when the remote workflow is newer
- restore saved open tabs from persisted tab state instead of letting
stale active-path state win
- preserve V2 draft payload timestamps when moving or refreshing draft
recency
- remove the now-unused V1 draft store/cache implementation instead of
suppressing knip; the raw V1 on-disk migration path remains for existing
users
Co-authored-by: xmarre <xmarre@users.noreply.github.com>
## Test coverage
Added unit coverage for V2 draft load, stale draft discard, rename/close
lifecycle cleanup, tab restore ordering, metadata-load waiting/fallback,
draft recency updates, quota eviction retry, and persistence-disabled
reset behavior.
Updated the workflow persistence composable tests to use a real
`vue-i18n` plugin host instead of mocking `vue-i18n`.
Added an E2E regression test that saves two workflows, edits an inactive
saved tab draft, makes the active-path pointer stale, reloads, and
verifies the saved tab order, active tab, and inactive draft
restoration.
## Validation
- `pnpm format`
- `pnpm lint`
- `pnpm typecheck`
- `pnpm test:unit`
- pre-push `pnpm knip` (passes with the existing flac tag hint)
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-12269-Fix-V2-draft-lifecycle-persistence-3606d73d365081b4a84feb1696ed88bb)
by [Unito](https://www.unito.io)
---------
Co-authored-by: xmarre <xmarre@users.noreply.github.com>
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