feat(editor): R-00362 M6-C extract, submit, and auto commit/export

[Go1c]

Summary

R-00362 M6-C: buildPatch from four-state tokens, Host POST /api/patch/validate / /api/patch/apply, submit() apply then optional Git/SVN commit and export, DiffPreview 预检/提交补丁.

Base: origin/main ae51a4d (PR #11). Does not merge itself. Out of scope: ConflictPanel/rebase, patch.py semantics, push/PR from Host.

Acceptance

1. Empty ops submit returns ok; files, fingerprints, and HEAD stay unchanged (skip commit/export when ops is empty).
2. update / create / rename / delete match handwritten patch apply byte-for-byte (including tombstones). Create has no expect; other ops expect baseline tokens. New row M3 id replaces draft:. Ref columns emit target names, not ids.
3. autoCommit=true: git log -1 first line config(<table>): <摘要>, whitelist three paths (git commit -- <paths>). autoCommit=false: dirty tree + 未提交 hint. SVN stub add then commit. allowDirtyWorkingTree=true skips commit.
4. autoExport=true writes build/export. EXPORT_FAILED / VCS_COMMIT_FAILED keep TXT; draft is still deleted after successful apply.

Closeout (worktree LumioConfig-wt-R-00362, HEAD c5b908a)

• python -m unittest discover -s tests -v: 110 tests, 1 skipped, OK
• python tools/lumio_config.py validate: OK
• python tools/lumio_config.py format --check: OK
• python tools/lumio_config.py export --out build/export: OK (3 tables)
• git diff --check: OK
• node spec-lint.mjs .: OK
• pnpm lint / pnpm test: 33 Vitest passed
• pnpm build + pnpm e2e: 22 Playwright passed (host-drafts + host-submit included)

Reviewer

Branch review vs origin/main found 4 bugs (watcher race, autosave vs ReadyToSubmit, leftover draft after VCS/EXPORT failure, ref ids). Follow-up commit c5b908a addresses them plus delete/tombstone coverage and commit pathspec.

Do not merge until evaluator independently verifies the four GET'd items.