Refactor execution modes and CLI integration across agents

- Updated code-developer, tdd-developer, and test-fix-agent to streamline execution modes based on task.meta.execution_config.method.
- Removed legacy command handling and introduced CLI handoff for 'cli' execution method.
- Enhanced buildCliHandoffPrompt to include task JSON path and improved context handling.
- Updated task-generate-agent and task-generate-tdd to reflect new execution method mappings and removed command field from implementation_approach.
- Improved CLI settings validation in CliSettingsModal with format and length checks.
- Added localization for new CLI settings messages in English and Chinese.
- Enhanced GPU selector to use localized strings for GPU types.
- Introduced TypeScript LSP setup documentation for better user guidance.

ccw/frontend/src/pages/SettingsPage.tsx

@@ -446,9 +446,9 @@ export function SettingsPage() {
           {/* System Theme Toggle (Backward Compatibility) */}
           <div className="flex items-center justify-between pt-4 border-t border-border">
             <div>
-              <p className="font-medium text-foreground">系统跟随</p>
+              <p className="font-medium text-foreground">{formatMessage({ id: 'settings.appearance.systemFollow' })}</p>
               <p className="text-sm text-muted-foreground">
-                使用系统的深色/浅色模式设置
+                {formatMessage({ id: 'settings.appearance.systemFollowDesc' })}
               </p>
             </div>
             <Button