Unify button tooltips across the app (#972)

* feat(tooltip): 2s open delay and shared tooltipAttrs helper

Add a 2s hover open delay in TooltipPortal (single behaviour source) so
tooltips no longer flash on quick pointer passes; hiding stays immediate.
Add tooltipAttrs() to pair data-tooltip with a matching aria-label for
buttons touched in the unification work. Covered by Vitest.

* feat(tooltip): lower open delay to 1s

2s felt too long in testing; 1s gives the same anti-flash behaviour
without making intentional hovers wait.

* feat(tooltip): action tooltips on the artist overview

Add tooltips describing the action to Last.fm, Wikipedia, Play All,
Shuffle and Radio. Shuffle/Radio now show a tooltip on desktop too,
not just mobile. Strings added to all 9 locales.

* feat(tooltip): action tooltips on the album overview

Add tooltips describing the action to the desktop Play, Artist Bio and
Download (ZIP) buttons, matching the mobile layout. Strings added to all
9 locales.

* feat(tooltip): action tooltips on the All Albums toolbar

Add tooltips describing the action to the sort, year and genre filter
buttons. SortDropdown gains an optional tooltip prop; the year and genre
filter components carry their own, so the tooltips also appear on the
other browse pages that reuse them. Strings added to all 9 locales.

* feat(tooltip): action tooltips on song-list rows

Add Play and Add-to-queue tooltips to the per-row icons in SongRow, used
by the Tracks browse list, Search and Advanced Search. Also localizes the
aria-labels, which were hardcoded English. New common.addToQueue in all 9
locales.

* fix(tooltip): uniform tooltip placement on the Artists toolbar

The favourite and multi-select buttons forced tooltips below while the
view-mode buttons auto-flipped above, so the row looked inconsistent.
Pin the view-mode buttons below too, matching the rest of the row and the
Albums toolbar.

* feat(tooltip): clarify and align the Advanced Search scope row

Add a leading "Search in:" label and per-chip tooltips so the
All/Artists/Albums/Songs row reads as a scope limiter. Drop the forced
below-placement on the small star filter (used only here) so the
favourites chip flips with the others instead of sitting alone below.
Strings added to all 9 locales.

* docs(changelog): tooltip unification (#972)

src/locales/de/common.ts

@@ -21,6 +21,7 @@ export const common = {
   noFolderSelected: 'Kein Ordner ausgewählt',
   rememberDownloadFolder: 'Ordner merken',
   filterGenre: 'Genre-Filter',
+  filterGenreTooltip: 'Nach Genre filtern',
   filterSearchGenres: 'Genres suchen…',
   filterNoGenres: 'Keine Genres gefunden',
   filterClear: 'Zurücksetzen',
@@ -28,6 +29,7 @@ export const common = {
   favoritesTooltipOff: 'Nur Favoriten anzeigen',
   favoritesTooltipOn: 'Alle anzeigen',
   play: 'Abspielen',
+  addToQueue: 'Zur Warteschlange hinzufügen',
   bulkSelected: '{{count}} ausgewählt',
   clearSelection: 'Auswahl aufheben',
   bulkAddToPlaylist: 'Zur Playlist hinzufügen',