## Release v0.51.262 — Release ID (stage-r12)
Phase-3 light slice (no-screenshot items) — 3 PRs.
### Fixed
| Issue/PR | Author | Fix |
|----------|--------|-----|
| #3432 (#3532) | @franksong2702 | Normalize the recall-prefill terminal `user` turn so WebUI doesn't send adjacent `user` roles to strict chat templates (Mistral/Gemma/Jinja). `_normalize_prefill_messages_before_user_turn()` in both `streaming.py` + `gateway_chat.py`; drops only the terminal user tail, preserves assistant/system/mid-list context. **Rebased onto master** (was CONFLICTING). |
| #2558 (#3516) | @rodboev | "Reveal in file manager" now translates container workspace paths (`/workspace`) back to the host mount path for Docker deployments (traversal-safe via `safe_resolve` + sibling-prefix guard). |
### Changed
| Issue/PR | Author | Change |
|----------|--------|--------|
| (#3539) | @Lyr-GW | Completed the Chinese (Simplified) `zh` localization (MCP controls, tool-list pagination) with all interpolations preserved, and the language dropdown now applies the locale **instantly** on change. |
### Review fix absorbed (Codex)
#3539 also added an `allowed=['en','zh']` filter to the Settings language dropdown, which dropped the 9 other shipped locales (it/ja/ru/es/de/pt/ko/fr/tr) — and since save falls back to `en` when the select has no matching option, an existing user of those locales would be **silently reset to English** on a Settings save. Removed the filter (dropdown enumerates all `LOCALES` again, matching master); partially-translated locales fall back per-key to English at render. + regression test `test_issue3539_language_dropdown_all_locales.py`.
### Gate
- Full pytest suite: **7701 passed, 0 failed**
- ESLint: CLEAN · ruff: CLEAN · browser-smoke: CLEAN
- Codex (regression): SHIP-ONLY-WITH-FIXES (dropdown drops-locales) → fixed → **SAFE TO SHIP** (verified prefill drops only terminal user tail in both paths, Docker path-translation traversal-safe, zh interpolations preserved)
Co-authored-by: franksong2702 <franksong2702@users.noreply.github.com>
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
Co-authored-by: Lyr-GW <Lyr-GW@users.noreply.github.com>
#3324 moved the WebUI session/delivery context from a prefill user message into
_webui_ephemeral_system_prompt, but the gateway-backed WebUI chat path built its
own system message from the bare _WEBUI_PROGRESS_PROMPT + prefill helper — which
now returns only recall prefill. That silently dropped connected platforms, home
channels, delivery hints, and session framing on Gateway-routed WebUI chats
(same #3278 data-drop class, on the path the author missed). Build the gateway
request's system message with _webui_ephemeral_system_prompt(surface_context,
config_data=cfg) so the context is preserved. Regression test asserts the
delivery context is present in the gateway system message.
Backfill model-context turns into the visible transcript before saving the
latest reply while keeping hidden [context compaction] markers out of the
visible transcript, so sidebar/header message counts no longer collapse a
compacted gateway session to a 2-message conversation. Resolves the
transcript-loss regression the v0.51.197 Codex gate flagged on the original.
Co-authored-by: AJV20 <24819659+AJV20@users.noreply.github.com>
