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/README.md

@@ -1,44 +1,51 @@
 # Arch package
 
-This PKGBUILD is intended for Arch Linux local release packaging. It builds
-from a local source archive exported from this repository, uses Arch system
-libraries, and disables FetchContent so package builds do not download
-dependencies during CMake configure.
+从当前仓库源码打包 qEmby（使用系统 Qt6 / mpv / qcoro / spdlog）。
 
-Before publishing an AUR-style release package, switch `source` to the new
-repository's versioned tag archive and replace the temporary `SKIP` checksum
-with a real checksum, for example by running `updpkgsums` after the tag archive
-is available.
+## 构建
 
-## Build
-
-```fish
+```bash
 cd packaging/arch
-git archive --format=tar.gz --prefix=qEmby-0.0.6/ -o qemby-0.0.6.tar.gz HEAD
+
+# 从工作树导出源码包（含未提交改动；排除 build 产物）
+VERSION=0.0.8
+rm -f "qemby-${VERSION}.tar.gz"
+tar -C ../.. -czf "qemby-${VERSION}.tar.gz" \
+  --transform "s,^,qEmby-${VERSION}/," \
+  --exclude='./build' \
+  --exclude='./cmake-build-*' \
+  --exclude='./packaging/arch/pkg' \
+  --exclude='./packaging/arch/src' \
+  --exclude='./packaging/arch/*.pkg.tar.zst' \
+  --exclude='./packaging/arch/*.tar.gz' \
+  --exclude='./.git' \
+  --exclude='./.omo' \
+  .
+
 makepkg -f
 ```
 
-## Install
+## 安装
 
-```fish
+```bash
 cd packaging/arch
-sudo pacman -U qemby-*.pkg.tar.zst
+sudo pacman -U ./qemby-0.0.8-1-x86_64.pkg.tar.zst
 ```
 
-## Run
+## 运行
 
-```fish
+```bash
 qemby
 ```
 
-If native Wayland causes windowing or OpenGL issues, run with the XCB fallback:
+Wayland 异常时可强制 XCB：
 
-```fish
+```bash
 QEMBY_FORCE_XCB=1 qemby
 ```
 
-## Uninstall
+## 卸载
 
-```fish
+```bash
 sudo pacman -R qemby
 ```