Symlinked VoiceOS integration folder blocks git checkout with run.sh

If VoiceOS's custom-mcps/<name> folder is a symlink to your repo, switching to a git branch where that integration's folder doesn't exist leaves the folder with only untracked files (.env, node_modules). VoiceOS then recreates run.sh and run.cmd there when it launches the integration. Switching back fails: 'untracked working tree files would be overwritten by checkout: run.cmd, run.sh'. The regenerated launchers were byte-identical to the tracked ones. Fix: cmp them against git show <branch>:<path>, delete them if identical, then switch. Prevention: quit VoiceOS before checking out a branch that lacks a symlinked integration, or keep each branch in its own git worktree.