review fix: 独立h5-manifest + 域名校验 + 恢复APK manifest

- ota/h5/manifest-{channel}.json — 独立于APK manifest
- ota/manifest-*.json — 恢复gen-manifest.sh格式
- v6 HTML: h5_sha256缺失拒绝 + h5_url域名校验

ota/manifest-nightly.json

@@ -1 +1 @@
-{"h5_version":"0.1.0-dav-android-6","h5_sha256":"6a25c8c5c1e2bacdac416885a0cd4754debf699344d63673cffcc91b5d646295","h5_url":"https://git.childish-ghost.com/LukeMackin/Yuzu-GCA/raw/branch/main/ota/h5/index-v6.html"}
+{"version":"0.1.0","builds":{"android":{"type":"apk","tag":"v0.1.0-dav-android-8","url":"https://git.childish-ghost.com/LukeMackin/Yuzu-GCA/releases/download/v0.1.0-dav-android-8/v0.1.0-dav-android-8-debug.apk","sha256":"b2451a398ea2dd34e585c5ec4529d6654451c9b9ab4ddf4a25ec9b032f0ac2bf","size":3506569,"channel":"nightly","minVersion":"0.1.0"}}}