Stability checkpoint stable-v1.0.20 (svc) — B-7 wave documentation: TASKS.md reflects 14 UI file splits + 3-way CustomerController split. Plus critical fix: _preamble.sh had stray '/usr/bin/env bash' (missing #!) that spawned an orphan bash interpreter every time any bin/run/*.sh sourced it, hanging all git push + tag pushes silently for 10+ min each. Bug present since Phase B-7-8 landed (MR !143). Post-merge main pipeline #682 SUCCESS.