fix(qt): kiosk feedback round — chrome, search, album, artists, lyrics

Address the owner's kiosk feedback on top of the release hardening:

- Chrome: the back bar is a drag surface and shrank to 44px with one shared
  button form for Back/Forward/Connect/Cast; Qobuz Connect and Cast are a
  permanent cluster in the bar; the dead Share-logs button left the kiosk
  Settings header.
- Transport bar: the hidden overflow menu is gone; Volume is always visible
  with a vertical sheet, and Desktop mode has its own button.
- Now Playing: one centred transport row (New-bar order); lyrics are centred
  (shared LyricsLinesView gains an opt-in centered, desktop default false).
- Local Library: the media funnel and an Open (ephemeral) entry point reach
  the kiosk; Artists is its own multi-column round-card grid (kiosk-only, the
  desktop LocalArtistsTab is untouched); the Artists drill-down query no
  longer hangs off a stale derived guard.
- Search: the All-tab dashboard shelves render again — they were mounted in a
  Loader Component that read the delegate id under reuse and bound an empty
  model; they are direct children now.
- Album detail: icon actions the height of the quality badge plus play next /
  later / queue, an inline floating quality badge, and zebra rows; both album
  headers show a quality badge.
- Immersive: a quiet auto-hiding kiosk exit moved to the bottom, clear of the
  window controls.

Regression coverage in scripts/test_qt_kiosk_feedback.mjs (wired into the
runtime gate). Verified on a private authenticated Xvfb; QML audits 6/6,
Node gate 5/5, release build 0 warnings.

cc

crates/qbz-qt/qml/shell/LyricsLinesView.qml

@@ -48,6 +48,10 @@ Item {
     property int dimmingMode: 2
     property bool autoFollow: true
     property bool uppercase: false
+    /// Opt-in centered lines (kiosk Now Playing). Desktop leaves it false, so
+    /// its left-aligned lyrics are unchanged. LyricsLineRow already implements
+    /// the centered layout AND the centered word-sync highlight offset.
+    property bool centered: false
     // 0 System · 1 LINE Seed JP · 2 Montserrat · 3 Noto Sans · 4 Source Sans 3
     property int fontIndex: 0
     property color activeColor: theme.accent
@@ -199,6 +203,7 @@ Item {
                         inactiveColor: view.inactiveColor
                         liteFill: view.liteFill
                         showTranslation: view.showTranslation
+                        centered: view.centered
                     }
 
                     // Click-to-seek on stamped lines. NOT in the Slint