docs(settings): third-review contracts across READMEs, catalogs, and the write-path integrity note

The seam README states the JSON-shaped write boundary, watch-disposer
quiescence, async listener containment, and the drained teardown; the
provider README rewrites Behavior around the operation chain,
read-modify-write, writer lock, ready reconcile, and leaf-level YAML
diffs, and updates Known Limitations to the residual guarantees.
A new Agent Note records the round's decisions and supersedes the
original note's deferred-lockfile alternative (cross-linked in place).
Chinese counterparts updated pair-by-pair (three briefed minimal
updates, one whole-document translation); type-equiv, config, cordis,
and module-graph catalogs re-recorded.

packages/settings/settings-local/src/index.ts

@@ -1,7 +1,9 @@
 /**
  * File-backed settings provider. One YAML or JSON document under the user's
  * harness home carries every namespace section; external edits hot-publish
- * through the seam and `update()` writes back preserving the user's comments.
+ * through the seam, and every write re-reads the document under a
+ * cross-process writer lock before patching it as a comment-preserving
+ * leaf-level diff.
  * @module @deepseek-ai/dsh-settings-local
  */