feat(lifecycle): auto-commit sweep of the machine flake before pull/rebuild/home

With settings.autoCommit on, only menu/theme mutations were committed
(theme-sync pathspec-limits to theme-state.json by design), so hand
edits to system.nix/home.nix and lock bumps stayed forever-dirty.

New internal nomarchy-autocommit (nomarchy-lifecycle): live-reads the
same flag, commits everything dirty as "nomarchy: auto-commit before
<pull|rebuild|home switch>" with the swept file list in the body,
fallback identity, never fatal (|| true at call sites). Called at the
top of all three lifecycle commands; before the ff-only pull it also
un-dirties the tree. Exposed via passthru.autocommit + package export;
guarded by checks.lifecycle-autocommit (sandbox repos: sweep, no-op on
clean/off/non-repo). Sync sweep: README, RECOVERY, ROADMAP, rofi
toggle, control-center prompt, theme-sync docstring, JOURNAL.

Verified: V1+ — flake check --no-build green; the new check builds;
end-to-end run of the built nomarchy-rebuild (stubbed sudo/rebuild)
against a copy of a real dirty ~/.nomarchy: 4 files → one commit,
clean tree. No VM boot — no session-visible surface.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pkgs/nomarchy-theme-sync/nomarchy-theme-sync.py

@@ -143,7 +143,10 @@ def auto_commit(message: str) -> None:
     fire this when the flag is on before OR after the write, so the
     disable-toggle itself lands in history instead of staying dirty.
     `bg` is deliberately excluded (runtime wallpaper churn); the wallpaper
-    path rides along with the next apply/set commit."""
+    path rides along with the next apply/set commit. The rest of a dirty
+    tree (hand edits, lock bumps) is swept by nomarchy-lifecycle's
+    nomarchy-autocommit right before a pull/rebuild/home switch — same
+    flag, honest message — so it never rides a settings-named commit."""
     if not (FLAKE_DIR / ".git").exists() or shutil.which("git") is None:
         return
     git = ["git", "-C", str(FLAKE_DIR)]