feat: complete QML shell migration and ship 0.0.8 Arch package

Replace the Widgets main shell with AppShellHost + QML routes, add a QML
independent player window, and remove the legacy player/page Widgets stack.
Also wire settings cache/proxy actions, fix quit-time engine teardown, improve
list/home scroll performance, and update Arch packaging to 0.0.8.

packaging/arch/PKGBUILD

@@ -1,7 +1,7 @@
 # Maintainer: local
 
 pkgname=qemby
-pkgver=0.0.7
+pkgver=0.0.8
 pkgrel=1
 pkgdesc="Desktop client for Emby and Jellyfin media servers"
 arch=('x86_64')
@@ -15,6 +15,7 @@ depends=(
   'mpv'
   'qcoro'
   'qt6-base'
+  'qt6-declarative'
   'qt6-svg'
   'qt6-websockets'
   'spdlog'
@@ -29,17 +30,19 @@ makedepends=(
 # new repository has published versioned release tags.
 source=("${pkgname}-${pkgver}.tar.gz")
 sha256sums=('SKIP')
+options=('!lto')
 
 build() {
   cmake -S "${srcdir}/qEmby-${pkgver}" -B "${srcdir}/build" -G Ninja \
-    -DCMAKE_BUILD_TYPE=None \
+    -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DCMAKE_INSTALL_LIBDIR=lib \
     -DQEMBY_USE_SYSTEM_DEPS=ON \
     -DQEMBY_FETCHCONTENT_FALLBACK=OFF \
     -DFETCHCONTENT_FULLY_DISCONNECTED=ON \
     -DQEMBY_NATIVE_OPTIMIZE=OFF \
-    -DQEMBY_ENABLE_IPO=OFF
+    -DQEMBY_ENABLE_IPO=OFF \
+    -DQEMBY_BUILD_NAVIGATION_TESTS=OFF
   cmake --build "${srcdir}/build"
 }