Auto-mode 'bash-first' system-prompt wording is A/B'd behind a remote gate, falling back to the strict wording

When auto/bypass mode qualifies for "bash-first" steering, mode metadata now carries bashFirstSteer: Y7n(). Y7n() resolves CLAUDE_CODE_COZY_TEAPOT, then a remote-settings/local-config lookup keyed by tengu_cozy_teapot, falling back to the literal "strict" if nothing is set. When bashFirstSteer resolves to "relaxed", a looser system prompt is used ("The choice is yours: prefer Edit or Write when a shell edit would be fragile...") in place of the default stricter prompt that pushes almost everything through Bash.