bd2c7dc45e
The top bar's unified search box + filter panel (29d0c335) already drives
the same shared filter store, so the files-page SearchFilterBar had become
a second, redundant input. Remove the component and its mount; the shared
store, URL sync and the files page's in-place search mode all stay — the
top bar is now the only filter writer. Drop the orphaned locale keys
(filter.placeholder/keyword/clear_keyword) from all 16 locales and rework
the affected tests to drive the store directly, with a resetFilters() +
URL reset in beforeEach to keep the module-level store from leaking.
Co-Authored-By: Claude Code <noreply@anthropic.com>