[SRiftX]

What changed

• Rework the reminder live room into a full viewing flow, using dart_simple_live as a design reference: player surface, room details, live chat, quality and route selectors, zoom/display controls, fullscreen, and picture-in-picture.
• Make quality selection affect both resolver output and adaptive HLS tracks; retry other routes automatically after playback failures.
• Show actual playback resolution and danmaku connection status, with reconnect support.
• Add regression tests and document the 0.2.18 behavior.

Validation

• Existing local reports for this exact tree: 254 JVM tests passed; lintDebug, assembleDebug, and assembleDebugAndroidTest completed.
• Release APK metadata is 0.2.18 / versionCode 29; its signing certificate matches the established release identity. FFmpeg release-readiness gate passed.
• A new Gradle invocation on this Windows host is blocked during Gradle startup by the error Unable to establish loopback connection; no Android device is attached, so platform live-stream playback, fullscreen, PiP, and live danmaku remain unverified.