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fix(chat): the background tasks list keeps to the room above the message box on a short screen - #354

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devswha merged 3 commits into
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fix/bg-tasks-popover
Oct 2, 2026
Merged

devswha merged 3 commits into
mainfrom
fix/bg-tasks-popover

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@devswha

@devswha devswha commented Oct 2, 2026

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What happened

On a short landscape viewport (844 x 390 CSS px, Compact density) the background tasks list opened above the message box ran up under the app header and past the top of the viewport. Its Workflows heading and the first workflow name could not be read, and could not be scrolled to either: the whole list fit inside the off-screen box, so scrollHeight equalled clientHeight. With Quick replies shown above the message box the box started about 43px above the viewport.

Cause

src/components/BackgroundTasks.css places .bg-tasks-menu absolutely above the composer (bottom: calc(100% + var(--space-2))) and bounded its height only by calc(var(--row-h) * 9), never by the room between the composer and the top of the pane.

Change

  • BackgroundTasks.tsx: while the list is open, a layout effect measures the room above the composer (composer top minus the top of the pane that holds it) and writes it to --bg-tasks-room on the list; a ResizeObserver on both keeps it current when the viewport or the composer changes height (typing, quick replies, attachments). CSS alone cannot know the composer's height.
  • BackgroundTasks.css: max-height is the smaller of the old nine rows and that room less a --space-2 gap at each end, and never less than one row. The list already had overflow-y: auto, so it now scrolls inside the room.

No new token, no change to the status line (still one 22px/24px row), nothing changes where there is room.

Validation

Demo build (bun run build:site) served locally, playwright-core headless Chrome, pane "Proofread the guide" -> "2 background tasks". Settings were set through the app's stored settings record (density: compact, showQuickReplies), which is what the Settings dialog writes.

Viewport Build header bottom popover top popover bottom clientHeight scrollHeight "Workflows" top
844x390 Compact main 46 -2.98 302 303 303 2.02 (under header)
844x390 Compact this PR 46 54 302 246 303 59
844x390 Compact + Quick replies main 46 -42.98 262 303 303 -37.98 (off screen)
844x390 Compact + Quick replies this PR 46 54 262 206 303 59
1280x800 main 52 368.5 708 338 338 373.5
1280x800 this PR 52 368.5 708 338 338 373.5
390x844 main 52 352.5 752 398 398 357.5
390x844 this PR 52 352.5 752 398 398 357.5

On this PR the list at 844x390 starts 8px below the header with the Workflows heading and "Guide release check" visible at scrollTop 0, and the rest ("3 recently ended") is reached by scrolling the list (scrollHeight 303 > clientHeight). Desktop and portrait geometry is identical before and after. Screenshots of all eight cases were taken and looked at (before-*.png / after-*.png, synthetic demo data only; not attached, as gh cannot upload images).

  • bun run typecheck: clean
  • bun run test:unit: 1050 pass, 3 skip, 0 fail

No browser regression is added: no script under scripts/ covers this component today (the OmO activity only exists in the demo transport), so there was no existing check to extend.

Fixes #348

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coderabbitai Bot commented Oct 2, 2026 •

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📝 Summary

Summary by CodeRabbit

  • UI Improvements
    • The background task menu adjusts its height to the available space above the composer, showing up to nine rows while retaining room for at least one.
    • The menu resizes when the surrounding layout changes, stays below the app header on short screens, and scrolls within the space above the message box.

Walkthrough

The background tasks menu measures the available room above its anchor when it opens and when its anchor or pane frame resizes. CSS uses this measurement to limit menu height while retaining a one-row minimum.

Changes

Background tasks menu sizing

Layer / File(s) Summary
Measure and apply the menu height limit
src/components/BackgroundTasks.tsx, src/components/BackgroundTasks.css, CHANGELOG.md
BackgroundTasks measures the anchor’s position relative to the pane frame and writes the available room to --bg-tasks-room. The menu CSS uses that value to cap its height at up to nine rows, with a one-row minimum and a 100vh fallback. The changelog records the fix.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🔵 Low · up to 40841

The background tasks list now keeps to the room above the message box on short screens. In extremely short viewports the one-row minimum may still push the menu slightly out of view. This is a narrow edge case and does not block merging, but the owner should be aware of it.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly identifies the primary fix: constraining the background tasks list to the available space above the message box on short screens.
Description check ✅ Passed The description explains the problem, cause, implementation, validation results, tested viewport scenarios, and issue linkage. It uses equivalent sections to the required Change and Validation section…
Linked Issues check ✅ Passed The pull request meets the coding requirements in issue #348. BackgroundTasks.tsx measures available space above the composer and updates --bg-tasks-room with ResizeObserver. `BackgroundTasks.cs…
Out of Scope Changes check ✅ Passed The changes to BackgroundTasks.tsx, BackgroundTasks.css, and CHANGELOG.md directly support issue #348. The measurement lifecycle, responsive height limit, scrolling behavior, and changelog entry…
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (1 skipped: 1 …
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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/components/BackgroundTasks.css:
- Line 69: Update the max-height rule in the BackgroundTasks styles to remove
the one-row minimum: cap it at the measured available room and clamp the result
to zero.

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Comment thread src/components/BackgroundTasks.css Resolved
@devswha
devswha merged commit 5af3a76 into main Oct 2, 2026
4 checks passed
@devswha
devswha deleted the fix/bg-tasks-popover branch October 2, 2026 19:50
devswha added a commit that referenced this pull request Oct 3, 2026
Bumps package.json and herdr-plugin.toml to 0.3.44, moves the Unreleased
notes under [0.3.44] - 2026-10-03, adds the compare link, and removes a
merge marker line left in CHANGELOG.md by #351's conflict resolution.
### Added
- Native Windows x64 installation through `install.ps1`, with the same
herdr plugin startup
and updates. Windows needs Bun and Git, without Node or WSL, and keeps
using the terminal
screen mirror. ([#330](#330)
by @JJLiebig)
- Settings can choose Chat, Terminal, or Auto as the default view for
panes. Changing it resets
remembered pane views on this device. Shell panes still open in
Terminal.
([#325](#325) by
@Haeminway1)
- Choose the terminal input line or direct typing on desktop as well as
touch screens, and
customize or unbind the app's Mod+Shift shortcuts with conflict checks
and reset.
  ([#334](#334))

### Changed
- In the sidebar's By workspace view, a workspace with one pane keeps
its numbered header and
can be folded, renamed and reordered from that header, just like a
workspace with several panes.
  ([#332](#332) by @beomq)
- The top usage panel shows larger percentages, remaining-capacity
colors and compact reset
countdowns with their local time. Expired reset times stay hidden until
fresh usage arrives.
([#336](#336) by
@Haeminway1)
- Pane titles that contain a directory show its last folder, and
matching workspace and folder
names appear once in the sidebar and command palette, including Windows
paths.
([#337](#337) by
@Haeminway1)
- In the sidebar's By workspace view, a pane row no longer repeats the
workspace its header names.
Its second line shows the folder only when neither the title nor the
workspace already says it.
  ([#358](#358))

### Fixed
- GJC conversations are resolved from the foreground process directory
when it differs from
the pane directory.
([#333](#333) by @Kinetic27)
- Direct terminal input preserves rapid IME commits when punctuation
arrives before composition
timers run, with a bounded xterm 5.5 backport and Korean final-consonant
regression checks.
Native Android/Gboard checks also fixed stale editor text after
Backspace breaking the next
Hangul word. Secret entry now refuses a held or unready attachment and
failed PTY writes.
  ([#334](#334))
- New session in the browser demo opens the new session instead of
leaving a blank page.
  ([#355](#355))
- Terminal input keeps multi-character IME commits and emoji while
disconnected, waits for the
attachment before sending keys, and reports input failures. Unsent input
lines survive pane,
lens and mode changes; late acknowledgements preserve replacement edits.
Composition keeps
its Enter and Send button, and terminal key-bar taps wait until it
finishes.
  ([#334](#334))
- The background tasks list stays below the app header on a short
screen, such as a phone held
  sideways, and scrolls inside the room above the message box.
  ([#354](#354))
- The mobile message box sits closer to the home indicator while
retaining its base spacing.
([#335](#335) by
@Haeminway1)
- Adding or reconnecting a remote PC says when herdr is not running or
not answering there,
  instead of only `Bridge verification failed (500)`.
  ([#353](#353))
- Shift+Enter in the live terminal sends the same newline chord as
Alt+Enter, instead of plain
Enter that submits an agent's message. Pending IME text is sent before
the newline chord.
([#339](#339) by
@WOULDU-pres)
- On Windows, and from an install path with a space or a non-ASCII
character, the app page loads
instead of the "not built yet" notice. The Windows installer replaces a
copy from a release
  without Windows support, and says so when a release cannot run there.
  ([#356](#356))
- On an iPhone home screen app, a text field that keeps its focus with
the keyboard down no
  longer leaves a status-bar band under the message box.
([#349](#349) by
@Haeminway1)
- After `/new` in an OmO pane, the chat stops showing the conversation
before it: OmO writes the
new session's file only with its first message, and until then the chat
shows what a fresh OmO
shows. ([#351](#351) by
@WOULDU-pres)
- On a Windows PC, an omo pane shows omo's mark instead of Claude's, and
its chat finds the
conversation: process words with `bun.exe`, backslashes and a drive
letter read as omo, and the
  session folder is named as omo's engine names a Windows folder.
([#342](#342) by
@Haeminway1)
- The chat lens finds an omo pane's conversation when its process keeps
its sessions outside
`~/.omo/agent` (`OMO_CODING_AGENT_DIR`, `SENPI_CODING_AGENT_DIR` or
`PI_CODING_AGENT_DIR`).
([#350](#350) by
@Haeminway1) passes. After the merge: .
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Background tasks popover is clipped above the viewport in landscape

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