feat: refactor plugin market interaction and migrate to LangBot Space

- Replace plugin detail dialog with hover buttons interaction
- Add "Install" and "View Details" hover buttons on plugin cards
- Remove PluginDetailDialog component
- Update plugin marketplace URL format to /market/{author}/{plugin}
- Redirect all plugin detail views to LangBot Space
- Add i18n support for 4 languages (zh-Hans, en-US, zh-Hant, ja-JP)
- Optimize hover overlay styles for light/dark theme

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

web/src/i18n/locales/en-US.ts

@@ -354,6 +354,7 @@ const enUS = {
     filterByComponent: 'Component',
     allComponents: 'All Components',
     requestPlugin: 'Request Plugin',
+    viewDetails: 'View Details',
   },
   mcp: {
     title: 'MCP',

web/src/i18n/locales/ja-JP.ts

@@ -356,6 +356,7 @@ const jaJP = {
     filterByComponent: 'コンポーネント',
     allComponents: '全部コンポーネント',
     requestPlugin: 'プラグインをリクエスト',
+    viewDetails: '詳細を表示',
   },
   mcp: {
     title: 'MCP',

web/src/i18n/locales/zh-Hans.ts

@@ -338,6 +338,7 @@ const zhHans = {
     filterByComponent: '组件',
     allComponents: '全部组件',
     requestPlugin: '请求插件',
+    viewDetails: '查看详情',
   },
   mcp: {
     title: 'MCP',

web/src/i18n/locales/zh-Hant.ts

@@ -336,6 +336,7 @@ const zhHant = {
     filterByComponent: '組件',
     allComponents: '全部組件',
     requestPlugin: '請求插件',
+    viewDetails: '查看詳情',
   },
   mcp: {
     title: 'MCP',