[Bug]: Mobile app chat messages render overlapping / garbled text

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/mobile

Steps to reproduce

1. Connect with the mobile app (iOS, T3 Code app) to an environment (cpamp · orangepi5-max) via T3 Connect / direct pairing.
2. Open a thread with long agent output — e.g. thread titled "Architecture desi..." with 7 subagents, tool-call summary rows ("Used 4 tools, ran 19 commands...", "Ran 9 commands, changed 6 files...", "Ran 17 commands..."), and "Working for 52m 30s" indicator.
3. Scroll through assistant messages containing Vietnamese text.
4. Observe the message bubbles.

Expected behavior

Each assistant message renders as readable, non-overlapping text lines, same as web/desktop.

Actual behavior

Assistant message text sometimes renders overlapped / garbled — multiple lines drawn on top of each other, unreadable. Looks like stacked text layers / incorrect line-height/layout in the chat bubble. Collapsible rows ("7 subagents", "Used 4 tools...") render fine, but the body paragraphs (Vietnamese content about BFF / plan Markdown / JWT / gateway etc.) are a jumble of overlapping glyphs.

Note: this is temporary, not permanent — go back out of the thread and re-enter, and the text renders normally again.

Screenshot: https://files.catbox.moe/04rzrw.png

Impact

Minor bug or occasional failure — text is temporarily unreadable but recovers after back + re-enter thread.

Version or commit

Server: 0.0.41-nightly.20260908.1414 (also seen on t3 v0.0.38 lineage) — mobile app version unknown (App Store latest)

Environment

• Mobile app (iOS, iPhone — see status-bar screenshot, dark mode)
• Server: Linux ARM64 (Orange Pi 5 Max), Node v26.5.0, provider opencode / muse-spark-1.3-contributor
• Thread: long-running agent session (7 subagents, 52m30s, Vietnamese output)

Logs or stack traces

N/A — pure UI rendering bug, no crash. Happy to provide screen recording if needed.

Screenshots, recordings, or supporting files

Screenshot (mirror of IMG_2062.png): https://files.catbox.moe/04rzrw.png

Workaround

Go back out of the thread and re-enter — text renders normally again. Alternatively open the same thread in web app / desktop app.

Start in apps/mobile and reproduce the overlap with a long-running thread containing Vietnamese assistant output, then compare the affected view with the normal rendering after leaving and re-entering the thread. Done means assistant message paragraphs render as readable, non-overlapping lines in the iOS app while the existing collapsible rows continue to render correctly.