feat: Add CodexLens Manager Page with tabbed interface for managing CodexLens features

feat: Implement ConflictTab component to display conflict resolution decisions in session detail

feat: Create ImplPlanTab component to show implementation plan with modal viewer in session detail

feat: Develop ReviewTab component to display review findings by dimension in session detail

test: Add end-to-end tests for CodexLens Manager functionality including navigation, tab switching, and settings validation

ccw/frontend/src/router.tsx

@@ -36,6 +36,7 @@ import {
   PromptHistoryPage,
   ExplorerPage,
   GraphExplorerPage,
+  CodexLensManagerPage,
 } from '@/pages';
 
 /**
@@ -141,6 +142,10 @@ const routes: RouteObject[] = [
         path: 'settings/rules',
         element: <RulesManagerPage />,
       },
+      {
+        path: 'settings/codexlens',
+        element: <CodexLensManagerPage />,
+      },
       {
         path: 'help',
         element: <HelpPage />,
@@ -206,6 +211,7 @@ export const ROUTES = {
   ENDPOINTS: '/settings/endpoints',
   INSTALLATIONS: '/settings/installations',
   SETTINGS_RULES: '/settings/rules',
+  CODEXLENS_MANAGER: '/settings/codexlens',
   HELP: '/help',
   EXPLORER: '/explorer',
   GRAPH: '/graph',