ScriptPlayer+ 0.5.0

ScriptPlayer+ 0.5.0 improves large-library reliability and adds guided recovery when Handy takes too long to upload or load a script.

Library catalog and thumbnails

Added a persistent library catalog so a previously scanned local or NAS folder can be shown immediately while a fresh scan runs in the background.
Preserved the saved catalog when the library root is offline or only part of a folder tree can be read, with separate complete, partial, and offline states.
Added refresh and full-index rebuild actions. A rebuild is published only after a complete scan and successful atomic save; otherwise the previous catalog remains available.
A successful full rebuild removes stale scan-derived metadata and automatic thumbnails, then probes them again. User ratings and custom thumbnail files are preserved.
Added persistent custom thumbnails from an image or the current playback frame, automatic thumbnail regeneration, and scored frame selection to avoid unusually dark or bright preview frames.
Prevented older thumbnail jobs from restoring stale memory or disk cache entries after a rebuild.

Distinguished a Handy device-side HSSP setup timeout from a script-server upload timeout.
Added a one-click compatibility-mode retry when Handy takes too long to load a script. Compatibility mode uses a longer action-count-aware timeout and up to three setup attempts.
Added a separate upload retry when sending the script to the Handy script server times out.
Added the recovery actions to both the normal device overlay and the fullscreen device panel.
Prevented cancelled or older requests from overwriting the status and URL of a newer retry.

Internal audio is now muted only while a synchronized mpv or VLC session is actually running. A failed launch or closed external player immediately returns audio to ScriptPlayer+ without changing the user's saved mute setting.
JavPlayer, JavPlayerEZ, PotPlayer, and custom external players remain manual launch targets and no longer force the internal player to stay muted merely because external viewing is enabled.
Added launch-time and live playback-rate synchronization for mpv and VLC, including rate reapplication before seek/play synchronization.
Prevented late pause, seek, rate, exit, and overlapping launch events from controlling or reviving a replaced external-player session.

Added embedded audio-track selection for media containers inspected through an external FFmpeg installation, with the selected track remembered per media file.
Added extraction and playback of embedded text subtitle tracks such as SRT, ASS/SSA, WebVTT, and mov_text. Bitmap subtitle formats such as PGS and DVD subtitles are identified but remain unavailable for rendering.
Improved FFmpeg compatibility-playback resume and seek handling, and kept playback diagnostics useful while redacting local file paths.

Added XTP-style script variant names such as Video - Slow.funscript, including grouped multi-axis files such as Video - Slow.L0.funscript and Video - Slow.R0.funscript.
Preserved existing default and bracket-style variant names while preferring the longest exact media filename, so similarly named videos do not inherit each other's scripts.
Kept library indexing, script selection, and reverse media lookup on the same matching rules for local and configured script folders.

Added a separate playback-start transition setting so a directly connected FunOSR or SR device can move toward the first script position before normal streaming begins.
Improved home transitions and large-seek catch-up with drain-aware serial writes and bounded software ramps, while avoiding an unnecessary transition for small hold/resume movements.
Applied TCode interval terms to every commanded axis and required explicit device-specific verification before using timed commands when the current position is unknown.
Bound timed-command verification to the connected device and profile, and invalidated stale serial work when the port, axis layout, or connection changes.

ScriptPlayer+ packages still contain no external ffmpeg.exe, ffprobe.exe, or ffplay.exe. FFmpeg-dependent thumbnail fallback and compatibility features use a separately installed or explicitly selected FFmpeg executable.
Added an explicit user-triggered FFmpeg installer that uses winget on Windows, Homebrew on macOS, or a detected apt/dnf/yum/pacman/zypper/apk package manager on Linux. ScriptPlayer+ runs only fixed package-manager commands and still does not bundle FFmpeg.