feat: add Skill Hub feature for managing community skills

- Implemented Skill Hub page with tabs for remote, local, and installed skills.
- Added localization support for Chinese in skill-hub.json.
- Created API routes for fetching remote skills, listing local skills, and managing installed skills.
- Developed functionality for installing and uninstalling skills from both remote and local sources.
- Introduced caching mechanism for remote skills and handling updates for installed skills.

ccw/frontend/src/locales/en/index.ts

@@ -40,6 +40,7 @@ import help from './help.json';
 import cliViewer from './cli-viewer.json';
 import team from './team.json';
 import terminalDashboard from './terminal-dashboard.json';
+import skillHub from './skill-hub.json';
 
 /**
  * Flattens nested JSON object to dot-separated keys
@@ -103,4 +104,5 @@ export default {
   ...flattenMessages(cliViewer, 'cliViewer'),
   ...flattenMessages(team, 'team'),
   ...flattenMessages(terminalDashboard, 'terminalDashboard'),
+  ...flattenMessages(skillHub, 'skillHub'),
 } as Record<string, string>;

ccw/frontend/src/locales/en/navigation.json

@@ -36,7 +36,8 @@
     "explorer": "File Explorer",
     "graph": "Graph Explorer",
     "teams": "Team Execution",
-    "terminalDashboard": "Terminal Dashboard"
+    "terminalDashboard": "Terminal Dashboard",
+    "skillHub": "Skill Hub"
   },
   "sidebar": {
     "collapse": "Collapse",

ccw/frontend/src/locales/en/skill-hub.json

@@ -0,0 +1,42 @@
+{
+  "skillHub.title": "Skill Hub",
+  "skillHub.description": "Discover and install shared skills from the community",
+  "skillHub.source.remote": "Remote",
+  "skillHub.source.local": "Local",
+  "skillHub.status.installed": "Installed",
+  "skillHub.status.updateAvailable": "Update Available",
+  "skillHub.tabs.remote": "Remote",
+  "skillHub.tabs.local": "Local",
+  "skillHub.tabs.installed": "Installed",
+  "skillHub.stats.remote": "Remote Skills",
+  "skillHub.stats.remoteDesc": "Available from community",
+  "skillHub.stats.local": "Local Skills",
+  "skillHub.stats.localDesc": "Shared locally",
+  "skillHub.stats.installed": "Installed",
+  "skillHub.stats.installedDesc": "Skills in use",
+  "skillHub.stats.updates": "Updates",
+  "skillHub.stats.updatesDesc": "New versions available",
+  "skillHub.search.placeholder": "Search skills...",
+  "skillHub.filter.allCategories": "All Categories",
+  "skillHub.actions.refresh": "Refresh",
+  "skillHub.actions.install": "Install",
+  "skillHub.actions.installing": "Installing...",
+  "skillHub.actions.update": "Update",
+  "skillHub.actions.uninstall": "Uninstall",
+  "skillHub.actions.viewDetails": "View Details",
+  "skillHub.card.tags": "Tags",
+  "skillHub.card.updated": "Updated: {date}",
+  "skillHub.install.success": "Skill '{name}' installed successfully",
+  "skillHub.install.error": "Failed to install skill: {error}",
+  "skillHub.uninstall.success": "Skill '{name}' uninstalled",
+  "skillHub.uninstall.error": "Failed to uninstall skill: {error}",
+  "skillHub.refresh.success": "Skill list refreshed",
+  "skillHub.details.comingSoon": "Details view coming soon",
+  "skillHub.error.loadFailed": "Failed to load skills. Check network connection.",
+  "skillHub.empty.remote.title": "No Remote Skills",
+  "skillHub.empty.remote.description": "Remote skill repository is empty or unreachable.",
+  "skillHub.empty.local.title": "No Local Skills",
+  "skillHub.empty.local.description": "Add skills to ~/.ccw/skill-hub/local/ to share them.",
+  "skillHub.empty.installed.title": "No Installed Skills",
+  "skillHub.empty.installed.description": "Install skills from Remote or Local tabs to use them."
+}

ccw/frontend/src/locales/en/skills.json

@@ -10,7 +10,8 @@
   },
   "location": {
     "project": "Project",
-    "user": "Global"
+    "user": "Global",
+    "hub": "Hub"
   },
   "source": {
     "builtin": "Built-in",

ccw/frontend/src/locales/zh/index.ts

@@ -40,6 +40,7 @@ import help from './help.json';
 import cliViewer from './cli-viewer.json';
 import team from './team.json';
 import terminalDashboard from './terminal-dashboard.json';
+import skillHub from './skill-hub.json';
 
 /**
  * Flattens nested JSON object to dot-separated keys
@@ -103,4 +104,5 @@ export default {
   ...flattenMessages(cliViewer, 'cliViewer'),
   ...flattenMessages(team, 'team'),
   ...flattenMessages(terminalDashboard, 'terminalDashboard'),
+  ...flattenMessages(skillHub, 'skillHub'),
 } as Record<string, string>;

ccw/frontend/src/locales/zh/navigation.json

@@ -36,7 +36,8 @@
     "explorer": "文件浏览器",
     "graph": "图浏览器",
     "teams": "团队执行",
-    "terminalDashboard": "终端仪表板"
+    "terminalDashboard": "终端仪表板",
+    "skillHub": "技能中心"
   },
   "sidebar": {
     "collapse": "收起",

ccw/frontend/src/locales/zh/skill-hub.json

@@ -0,0 +1,42 @@
+{
+  "skillHub.title": "技能中心",
+  "skillHub.description": "发现并安装社区共享的技能",
+  "skillHub.source.remote": "远程",
+  "skillHub.source.local": "本地",
+  "skillHub.status.installed": "已安装",
+  "skillHub.status.updateAvailable": "有更新",
+  "skillHub.tabs.remote": "远程",
+  "skillHub.tabs.local": "本地",
+  "skillHub.tabs.installed": "已安装",
+  "skillHub.stats.remote": "远程技能",
+  "skillHub.stats.remoteDesc": "来自社区",
+  "skillHub.stats.local": "本地技能",
+  "skillHub.stats.localDesc": "本地共享",
+  "skillHub.stats.installed": "已安装",
+  "skillHub.stats.installedDesc": "使用中的技能",
+  "skillHub.stats.updates": "更新",
+  "skillHub.stats.updatesDesc": "有新版本可用",
+  "skillHub.search.placeholder": "搜索技能...",
+  "skillHub.filter.allCategories": "全部分类",
+  "skillHub.actions.refresh": "刷新",
+  "skillHub.actions.install": "安装",
+  "skillHub.actions.installing": "安装中...",
+  "skillHub.actions.update": "更新",
+  "skillHub.actions.uninstall": "卸载",
+  "skillHub.actions.viewDetails": "查看详情",
+  "skillHub.card.tags": "标签",
+  "skillHub.card.updated": "更新于: {date}",
+  "skillHub.install.success": "技能 '{name}' 安装成功",
+  "skillHub.install.error": "安装技能失败: {error}",
+  "skillHub.uninstall.success": "技能 '{name}' 已卸载",
+  "skillHub.uninstall.error": "卸载技能失败: {error}",
+  "skillHub.refresh.success": "技能列表已刷新",
+  "skillHub.details.comingSoon": "详情视图即将推出",
+  "skillHub.error.loadFailed": "加载技能失败。请检查网络连接。",
+  "skillHub.empty.remote.title": "暂无远程技能",
+  "skillHub.empty.remote.description": "远程技能仓库为空或无法访问。",
+  "skillHub.empty.local.title": "暂无本地技能",
+  "skillHub.empty.local.description": "将技能添加到 ~/.ccw/skill-hub/local/ 即可共享。",
+  "skillHub.empty.installed.title": "暂无已安装技能",
+  "skillHub.empty.installed.description": "从远程或本地标签页安装技能以使用它们。"
+}

ccw/frontend/src/locales/zh/skills.json

@@ -10,7 +10,8 @@
   },
   "location": {
     "project": "项目",
-    "user": "全局"
+    "user": "全局",
+    "hub": "仓库"
   },
   "source": {
     "builtin": "内置",