Add internationalization support for help view and implement help rendering logic

- Introduced `help-i18n.js` for managing translations in Chinese and English for the help view.
- Created `help.js` to render the help view, including command categories, workflow diagrams, and CodexLens quick-start.
- Implemented search functionality with debounce for command filtering.
- Added workflow diagram rendering with Cytoscape.js integration.
- Developed tests for write-file verification, ensuring proper handling of small and large JSON files.

ccw/src/templates/dashboard.html

@@ -443,6 +443,10 @@
                 <span class="nav-text flex-1" data-i18n="nav.claudeManager">CLAUDE.md</span>
                 <span class="badge px-2 py-0.5 text-xs font-semibold rounded-full bg-hover text-muted-foreground" id="badgeClaude">0</span>
               </li>
+              <li class="nav-item flex items-center gap-2 mx-2 px-3 py-2.5 text-sm text-muted-foreground hover:bg-hover hover:text-foreground rounded cursor-pointer transition-colors" data-view="help" data-tooltip="Help & Guide">
+                <i data-lucide="help-circle" class="nav-icon"></i>
+                <span class="nav-text flex-1" data-i18n="nav.help">Help</span>
+              </li>
             </ul>
           </div>