v1.21.0

Changelog

• 7b4bb59 Merge #6: detect AI sessions via alias/wrapper/interpreter
• 016295f Merge #7: optional tab/pane names in Blueprints
• 68e304f Merge branch 'audit/parity-and-cleanup': CLI parity (now/settings) + doc sync + test de-flake
• 0f8e818 Merge branch 'audit/security-ux-fixes': security/UX hardening + dead-code cleanup
• 9a63567 feat: Ghostty no-ops surface naming + document tab/pane name limits (#7)
• d37254a feat: add now + settings CLI commands; sync docs; de-flake detect tests
• 816bebf feat: optional tab/pane names in Blueprints (#7)
• 8bf5cf9 feat: preserve per-pane working directory across save/restore (#8)
• 6dcd180 fix: cmux multi-pane restore — focus-pane rejected synthetic pane:N ref
• 59e96dd fix: detect AI sessions launched via alias, wrapper, or interpreter (#6)
• ba97429 fix: harden restore, fix stdout/stderr & backend selection, prune dead code
• cd749d2 fix: make per-pane CWD restore reliable (#8) — gate on real surface readiness + verify
• e4c0ac5 merge #8 per-pane CWD onto focus-fix
• 9a29032 style: gofmt test files for release