release: prepare v1.21.2 sync fixes

Author: arch3rPro

CHANGELOG-zh.md

@@ -5,6 +5,22 @@
 格式基于 [Keep a Changelog](https://keepachangelog.com/zh-CN/1.1.0/)，
 版本号遵循 [语义化版本](https://semver.org/lang/zh-CN/)。
 
+## [1.21.2] - 2026-05-28
+
+### 发布概览
+- **同步状态与文档修复版本** — 修复远程更新状态残留、WebDAV 同步时间显示和 Git 同步自锁问题，并刷新公开 README 的功能截图展示。
+
+### 用户可见更新
+- **远程管理更新状态修复** — 远程 Skill 与本地 Skills Center 的修订或内容哈希一致后，会显示“已最新”，不再在更新后继续标记为“可更新”。
+- **WebDAV 上次同步时间修复** — 设置页现在会正确把秒级同步时间戳转换为毫秒显示，并在上传/下载后刷新页面中的同步状态。
+- **Git 同步 Busy 处理** — Git 同步的提交、初始化和快照流程不再重复获取仓库锁；仓库忙时也会提示当前有其他同步或 Skill 操作在运行。
+- **README 截图展示** — 英文和中文 README 新增并刷新数据看板、技能管理、技能商店、远程管理、设置和 Claude 插件截图。
+
+### 开发者与治理更新
+- **远程快照元数据保留** — 远程扫描会为未变化的已更新 Skill 保留来自 Skills Center 的来源元数据，避免后续扫描破坏更新状态判断。
+- **托管 Skill DTO 内容哈希** — 前端现在可以拿到中心 Skill 的内容哈希，并与远程快照进行比较。
+- **回归覆盖** — 新增远程管理测试，覆盖从中心更新远程 Skill 后再次扫描仍保留更新元数据的场景。
+
 ## [1.21.1] - 2026-05-26
 
 ### 发布概览

CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.21.2] - 2026-05-28
+
+### Release Overview
+- **Sync Status and Documentation Fix Release** — Fixes stale remote update badges, WebDAV sync timestamps, and Git sync self-locking while refreshing the public README screenshots.
+
+### User-facing
+- **Remote Management Update State** — Remote Skills now show as up to date after they match the local Skills Center revision or content hash, instead of staying marked as updatable after an update.
+- **WebDAV Last Sync Time** — Settings now displays WebDAV sync timestamps with the correct seconds-to-milliseconds conversion and refreshes the shown status after upload/download operations.
+- **Git Sync Busy Handling** — Git sync no longer fails by taking the repository lock twice during commit/init/snapshot flows, and busy repository errors now explain that another operation is running.
+- **README Screenshot Gallery** — Added refreshed Dashboard, Skills Management, Skills Store, Remote Management, Settings, and Claude Plugin screenshots to the English and Chinese README files.
+
+### Developer & Governance
+- **Remote Snapshot Metadata Preservation** — Remote scans preserve center Skill source metadata for unchanged updated Skills so follow-up scans keep accurate update status.
+- **Managed Skill DTO Content Hash** — The frontend now receives center Skill content hashes and can compare them against remote snapshots.
+- **Regression Coverage** — Added a remote management test covering update metadata preservation after a successful center-to-remote update and scan.
+
 ## [1.21.1] - 2026-05-26
 
 ### Release Overview

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "skills-manager-plus",
   "private": true,
-  "version": "1.21.1",
+  "version": "1.21.2",
   "type": "module",
   "scripts": {
     "dev": "vite",

package.json

@@ -1,6 +1,6 @@
 [package]
 name = "skills-manager-plus"
-version = "1.21.1"
+version = "1.21.2"
 description = "Skills-Manager-Plus - AI Agent Skills Central Manager"
 authors = ["tianliang"]
 license = "MIT"

src-tauri/Cargo.lock

@@ -1,7 +1,7 @@
 {
   "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
   "productName": "Skills-Manager-Plus",
-  "version": "1.21.1",
+  "version": "1.21.2",
   "identifier": "com.agentskills.skillsmanagerplus",
   "build": {
     "frontendDist": "../dist",

src-tauri/Cargo.toml

@@ -566,7 +566,7 @@
     "language": "Language",
     "help": "Help",
     "about": "About",
-    "version": "Skills-Manager-Plus 1.21.1",
+    "version": "Skills-Manager-Plus 1.21.2",
     "tagline": "Cross-platform. Minimal, efficient, seamless multi-preset switching.",
     "supportToolsDesc": "Logs are stored locally with automatic rotation. Exported archives redact common secrets before sharing.",
     "openLogs": "Open Logs",

src-tauri/tauri.conf.json

@@ -533,7 +533,7 @@
     "language": "語言",
     "help": "說明",
     "about": "關於",
-    "version": "Skills-Manager-Plus 1.21.1",
+    "version": "Skills-Manager-Plus 1.21.2",
     "tagline": "跨平台。極簡、高效、無感多預設切換。",
     "supportToolsDesc": "日誌會保存在本機並自動輪替；匯出的壓縮檔會先脫敏常見金鑰與憑證資訊。",
     "openLogs": "開啟日誌",

src/i18n/en.json

@@ -566,7 +566,7 @@
     "language": "语言",
     "help": "帮助",
     "about": "关于",
-    "version": "Skills-Manager-Plus 1.21.1",
+    "version": "Skills-Manager-Plus 1.21.2",
     "tagline": "跨平台。极简、高效、无感多预设切换。",
     "supportToolsDesc": "日志会保存在本地并自动轮转；导出的压缩包会先脱敏常见密钥和凭证信息。",
     "openLogs": "打开日志",