Codex regression gate caught: the guard predicate keyed on a raw messagesEl.scrollTop>0,
so a pinned reader transiently at bottomDistance>250 mid-render (assistant body grows
before the anchor scene re-renders) got flipped to _messageUserUnpinned=true/_scrollPinned=false
and lost auto-follow. Require an explicit non-follow signal (_messageUserUnpinned || _scrollPinned===false)
instead. Updated the existing guard test to a genuine unpinned reader + added a pinned-large-growth
regression. Co-authored-by: franksong2702
## Release v0.51.254 — Release HV (stage-r2)
Phase-2 medium wave 1 — 4 PRs (UI/mobile/cancel fixes + an un-held model dedup).
### Fixed
| Issue/PR | Author | Fix |
|----------|--------|-----|
| #3528 | @franksong2702 | Render partial tool calls after cancel — interrupted turns keep their `_partial_tool_calls` rows in the transcript + fallback tool-cards. (Codex confirmed it stays render-only, not forwarded to the provider API.) |
| #3550 | @lurebat | Android offline recovery soft-reattaches the live stream instead of hard-reloading the page on a transient background/disconnect. |
| #3479 | @mvanhorn | iOS Safari no longer snaps the conversation to the top when a handoff/compression card is inserted mid-stream or on `refreshSession()`. |
| #3478 | @JayC-L | **Un-held:** named custom providers (`@custom:name:model`) dedup against bare model IDs without regressing Ollama multi-colon tags (`qwen2.5:7b-instruct-q4`). Only `@custom:` IDs strip the two-segment prefix. |
### Hold-sweep note
#3478/#3489 was held yesterday for an Ollama multi-colon-tag regression risk (a blanket `lastIndexOf` would lose the model). The author pushed a scoped fix (only `@custom:` IDs use `lastIndexOf`); I verified `_normId` in node against the regression cases — Ollama bare tags are preserved. Un-held + shipped.
### Gate
- Full pytest suite: **7588 passed, 0 failed**
- ESLint: CLEAN · ruff: CLEAN · browser-smoke: CLEAN
- Codex (regression): **SAFE TO SHIP** — #3552 partial-tool-calls verified render-only (no `_API_SAFE_MSG_KEYS` leak / no 400-on-strict-provider, the v0.50.251 #1375 trap); #3551 no EventSource double-subscribe; #3541 no regression vs the #3525 scroll-follow shipped in v0.51.253; #3489 no over-dedup.
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
Co-authored-by: lurebat <lurebat@users.noreply.github.com>
Co-authored-by: mvanhorn <mvanhorn@users.noreply.github.com>
Co-authored-by: JayC-L <JayC-L@users.noreply.github.com>
Frank Song