feat: Add unified LiteLLM API management with dashboard UI and CLI integration

- Create ccw-litellm Python package with AbstractEmbedder and AbstractLLMClient interfaces
- Add BaseEmbedder abstraction and factory pattern to codex-lens for pluggable backends
- Implement API Settings dashboard page for provider credentials and custom endpoints
- Add REST API routes for CRUD operations on providers and endpoints
- Extend CLI with --model parameter for custom endpoint routing
- Integrate existing context-cache for @pattern file resolution
- Add provider model registry with predefined models per provider type
- Include i18n translations (en/zh) for all new UI elements

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ccw/src/templates/dashboard-js/components/navigation.js

@@ -149,6 +149,12 @@ function initNavigation() {
         } else {
           console.error('renderCodexLensManager not defined - please refresh the page');
         }
+      } else if (currentView === 'api-settings') {
+        if (typeof renderApiSettings === 'function') {
+          renderApiSettings();
+        } else {
+          console.error('renderApiSettings not defined - please refresh the page');
+        }
       }
     });
   });
@@ -191,6 +197,8 @@ function updateContentTitle() {
     titleEl.textContent = t('title.coreMemory');
   } else if (currentView === 'codexlens-manager') {
     titleEl.textContent = t('title.codexLensManager');
+  } else if (currentView === 'api-settings') {
+    titleEl.textContent = t('title.apiSettings');
   } else if (currentView === 'liteTasks') {
     const names = { 'lite-plan': t('title.litePlanSessions'), 'lite-fix': t('title.liteFixSessions') };
     titleEl.textContent = names[currentLiteType] || t('title.liteTasks');