Add Linker and Optimizer modules with API integration and frontend components

- Added Linker and Optimizer apps to `INSTALLED_APPS` in `settings.py`.
- Configured API endpoints for Linker and Optimizer in `urls.py`.
- Implemented `OptimizeContentFunction` for content optimization in the AI module.
- Created prompts for content optimization and site structure generation.
- Updated `OptimizerService` to utilize the new AI function for content optimization.
- Developed frontend components including dashboards and content lists for Linker and Optimizer.
- Integrated new routes and sidebar navigation for Linker and Optimizer in the frontend.
- Enhanced content management with source and sync status filters in the Writer module.
- Comprehensive test coverage added for new features and components.

frontend/src/App.tsx

@@ -32,6 +32,15 @@ const Drafts = lazy(() => import("./pages/Writer/Drafts"));
 const Images = lazy(() => import("./pages/Writer/Images"));
 const Published = lazy(() => import("./pages/Writer/Published"));
 
+// Linker Module - Lazy loaded
+const LinkerDashboard = lazy(() => import("./pages/Linker/Dashboard"));
+const LinkerContentList = lazy(() => import("./pages/Linker/ContentList"));
+
+// Optimizer Module - Lazy loaded
+const OptimizerDashboard = lazy(() => import("./pages/Optimizer/Dashboard"));
+const OptimizerContentSelector = lazy(() => import("./pages/Optimizer/ContentSelector"));
+const AnalysisPreview = lazy(() => import("./pages/Optimizer/AnalysisPreview"));
+
 // Thinker Module - Lazy loaded
 const ThinkerDashboard = lazy(() => import("./pages/Thinker/Dashboard"));
 const Prompts = lazy(() => import("./pages/Thinker/Prompts"));
@@ -207,6 +216,45 @@ export default function App() {
               </Suspense>
             } />
 
+            {/* Linker Module */}
+            <Route path="/linker" element={
+              <Suspense fallback={null}>
+                <ModuleGuard module="linker">
+                  <LinkerDashboard />
+                </ModuleGuard>
+              </Suspense>
+            } />
+            <Route path="/linker/content" element={
+              <Suspense fallback={null}>
+                <ModuleGuard module="linker">
+                  <LinkerContentList />
+                </ModuleGuard>
+              </Suspense>
+            } />
+
+            {/* Optimizer Module */}
+            <Route path="/optimizer" element={
+              <Suspense fallback={null}>
+                <ModuleGuard module="optimizer">
+                  <OptimizerDashboard />
+                </ModuleGuard>
+              </Suspense>
+            } />
+            <Route path="/optimizer/content" element={
+              <Suspense fallback={null}>
+                <ModuleGuard module="optimizer">
+                  <OptimizerContentSelector />
+                </ModuleGuard>
+              </Suspense>
+            } />
+            <Route path="/optimizer/analyze/:id" element={
+              <Suspense fallback={null}>
+                <ModuleGuard module="optimizer">
+                  <AnalysisPreview />
+                </ModuleGuard>
+              </Suspense>
+            } />
+
             {/* Thinker Module */}
             <Route path="/thinker" element={
               <Suspense fallback={null}>