v0.47.16 — stale session-map edges cleared on run switch
Switching to a different session no longer leaves the previous run's connection lines lingering over the new tree (most visible on Chrome/Windows).
- The earlier fix reset only the workspace file-arc layer; the session map's own node-to-node lines and in-map file arcs were never cleared on a run switch. They're now cleared before paint the instant the run changes.
- The edge SVG layers remount per session so a stale GPU-composited layer (Chrome/Windows can skip repainting a transformed SVG when only path data changes) can't carry old lines into the new run.
Host-agnostic — applies to Claude Code, OpenCode, Gajae-Code, and the rest.