feat(home): add help center quick operation link

- Add helpCenter.svg and helpCenter_active.svg menu icons for help center navigation
- Add "Help Center" translation strings to English and Chinese i18n files
- Update QuickOperation component to include help center as fourth quick operation
- Implement external link handler that opens help documentation based on current language (zh or en)
- Change grid layout from 3 columns to 4 columns to accommodate new help center card
- Add file header documentation to QuickOperation component
- Help center link redirects to https://docs.redbearai.com/s/{lang}-memorybear with language-specific routing

web/src/i18n/en.ts

@@ -91,6 +91,7 @@ export const en = {
       memberManagement: 'Member Management',
       memorySummary: 'Memory Summary',
       memoryConversation: 'Memory Validation',
+      helpCenter: 'Help Center',
       memorySummaryHandlers: 'Memory Summary Handlers',
       createMemorySummary: 'Create Memory Summary',
       memoryManagement: 'Memory Management',
@@ -190,7 +191,8 @@ export const en = {
 
       memoryConversation: 'Memory Conversation',
       memoryConversationDesc: 'Memory Conversation',
-
+      helpCenter: 'Help Center',
+      helpCenterDesc: 'Help Center',
       memorySummary: 'View Memory Summary',
       memorySummaryDesc: 'View Memory Summary Report',
 
@@ -616,6 +618,7 @@ export const en = {
       retrieve:'Retrieve',
       processing: 'Processing',
       processingMode: 'Processing Mode',
+      processMsg: 'Processing Message',
       dataSize: 'Data Size',
       createUpdateTime: 'Create/Update Time',
       operation: 'Operation',

web/src/i18n/zh.ts

@@ -789,7 +789,8 @@ export const zh = {
 
       memoryConversation: '记忆对话',
       memoryConversationDesc: '记忆对话',
-
+      helpCenter: '帮助中心',
+      helpCenterDesc: '帮助中心',
       memorySummary: '查看记忆摘要',
       memorySummaryDesc: '查看记忆摘要报告',