## Summary
Fixes two instances of the same dead-truncate pattern in the desktop
app, where a flex item's implicit `min-width: auto` prevented `truncate`
from engaging, so long text painted over adjacent controls instead of
ellipsizing:
- **Inbox detail title** (`InboxDetailPane.tsx`): the clickable
context-title button sized to its text instead of shrinking with the
pane, overlapping the header controls (open-in-channel, members, huddle,
more menu). Fixed by adding `max-w-full`.
- **Message author names** (`MessageHeader.tsx` /
`UserProfilePopover.tsx`): the `UserProfilePopover` inline-flex trigger
wrapper refused to shrink below the name's nowrap width, running long
author names under the hover action bar and off the pane edge. Fixed by
adding a `triggerClassName` prop to `UserProfilePopover` and passing
`min-w-0 max-w-full` at the author call site.
Two other suspected instances (project file breadcrumb, drafts pane
title) were stress-tested and already truncate correctly — no change.
### Related issue
N/A — none found.
### Testing
- New Playwright regression tests for both fixes
(`inbox-title-overlap.spec.ts`, `message-author-overlap.spec.ts`,
registered in the smoke project), each proven to discriminate: they fail
with the fix reverted (real measured overlap) and assert the ellipsis
actually engages with non-zero title width, so they can't pass
vacuously.
- Typecheck, lint, and full desktop unit suite green (pre-push hooks);
full desktop e2e smoke suite run earlier: 1402 passed, 3 pre-existing
unrelated failures (each fails identically with the fix reverted).
**Inbox title — before** (long title paints under the header controls):
**Inbox title — after** (truncates with ellipsis, controls stay clear):
**Author name — before** (long name runs past the header row edge):
**Author name — after** (clean cutoff):
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Signed-off-by: cynfria <yescynthia@gmail.com>
Signed-off-by: Tree Trunks <6ba22921d9dc2ad0aa6ecdf63787ddd24726e266d866da31af69f2e4e146ace5@buzz.block.builderlab.xyz>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: Tree Trunks <6ba22921d9dc2ad0aa6ecdf63787ddd24726e266d866da31af69f2e4e146ace5@buzz.block.builderlab.xyz>
cec5c8fd92