Merge remote-tracking branch 'origin/master' into worktree/i18n-complete-non-readme

# Conflicts:
#	packages/client/i18n/README.md
#	packages/client/locale/README.i18n.yaml
#	packages/client/locale/README.zh.md
#	packages/client/ui-layout/README.md
#	packages/client/ui-theme/README.md

packages/client/locale/README.md

@@ -0,0 +1,18 @@
+# @deepseek-ai/dsh-client-locale
+
+English | [中文](README.zh.md)
+
+Locale plugin: LocaleService — the browser locale preference (`zh`/`en`, persisted under `dsh.locale`, getter/setter with `locale/change` snapshots) plus the ns×locale dictionary registry (`bind(ns)`→t with a stable function identity; lookup chain active → zh → key).
+
+## Model Experience
+
+None, as the locale registry serves browser UI copy; nothing here reaches a model request.
+
+#### KV Cache effect
+
+None; this package neither assembles nor sends a provider request.
+
+## Known Limitations and Deferred Work
+
+- **Only the Settings surface is translated** — other pages keep inline copy; repo-wide extraction into dictionaries is deferred.
+- **Locale switching re-renders subscribed consumers only** — sections not wired to `locale/change` keep their rendered text until remount.