Two layout fixes for the Lasts ListView:
1. Tab bar: status filters (Alle/Vermutet/Bestätigt/Aufgehoben) get inline
Phosphor icons + parenthesized counters. Inbox/Meilensteine/Einstellungen
now render as full icon+label tabs in a `border-left`-separated cluster
instead of icon-only links. The whole bar is `overflow-x: auto` with
hidden scrollbars (matches calendar/DateStrip pattern), so narrow
workbench cards scroll horizontally instead of wrapping.
2. Quick-add: collapses two rows (input + Vermutet/Bestätigt pill toggle)
into one. Mode is a `<select>` styled like the category select, sitting
to the right of the title input. Removes the visual duplication where
the toggle pills mimicked the status tabs above.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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