Rename update_dms to update-memory and document command streamlining

## Command Updates
- Renamed `/update_dms` → `/update-memory` for kebab-case consistency
- Updated all references across documentation, installation scripts, and agents

## Files Updated
- `.claude/commands/update_dms.md` → `.claude/commands/update-memory.md`
- Updated 8 files with command name references
- Updated both English and Chinese README files
- Updated installation scripts and agent documentation

## Documentation Enhancement
- Added comprehensive command streamlining section to CHANGELOG.md
- Documented removal of 4 redundant commands (context.md, sync.md)
- Documented cleanup of 10 legacy documentation files
- Highlighted 60% reduction in maintenance overhead

## Consistency Improvements
- Standardized command naming convention across entire system
- Enhanced session management documentation
- Improved error handling documentation for session registry

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

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

install-remote.ps1

@@ -294,7 +294,7 @@ function Main {
     Write-ColorOutput "Next steps:" $ColorInfo
     Write-Host "1. Review CLAUDE.md for project-specific guidelines"
     Write-Host "2. Try /workflow commands for Agent coordination"
-    Write-Host "3. Use /update_dms to manage distributed documentation"
+    Write-Host "3. Use /update-memory to manage distributed documentation"
     
     Wait-ForUserConfirmation "Remote installation done! Press any key to exit..." -ExitAfter
 }