v0.2.15

fix: manual override (checked track = force upgrade even if above bar or already in library, in-place deposit), fix: suspect forensic tracks never 'already good', fix: 'already good' status instead of stuck 'queued...', fix: auto-pick listen port (no more Hyper-V/WSL/Docker port clash), fix: all audio tracks checkable, fix: window centered on startup, feat: startup splash screen