Bring back the pre-v1.2.2 classic vertical list for example images as a
persisted showcase_layout setting (gallery stays the default), switchable
from both a Settings select and an in-modal segmented toggle.
- Revive the vertical list renderer (adapted from 4a6042d0) as
VerticalListView.js, reusing the shared MediaUtils/MetadataPanel
infrastructure; legacy CSS scoped under .showcase-vertical
- Dispatch showcase rendering on state.settings.showcase_layout;
collapsed bar, empty/filtered states and import flow stay shared
- Keep the back-to-top button available in vertical mode (the
showcase-expanded class that hides it now only applies to the gallery,
whose thumbnail strip occupies that corner)
- Persist the setting via DEFAULT_SETTINGS + DEFAULT_SETTINGS_BASE and a
new select under Settings > Layout Settings
- i18n: 6 new keys translated in all 9 locales; terminology recorded in
docs/i18n-translation-guidelines.md
Closes#1136
Adds a 'Keep Action Bar Visible' toggle (default off) under
Settings > Interface > Layout Settings. When enabled, the controls bar
(Refresh, Download, etc.) and the breadcrumb nav are wrapped in a shared
sticky container (.sticky-topbar) so both stay pinned as one unit; when
disabled, the wrapper is display: contents and the original behavior
(only the breadcrumb stays visible) is preserved.
Will Miao