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/api/linker.api.ts

@@ -0,0 +1,32 @@
+import { fetchAPI } from '../services/api';
+
+/**
+ * Linker API Client
+ * Functions for internal linking operations
+ */
+export const linkerApi = {
+  /**
+   * Process a single content item for internal linking
+   * @param contentId - Content ID to process
+   * @returns Link result with links added
+   */
+  process: async (contentId: number) => {
+    return await fetchAPI('/v1/linker/process/', {
+      method: 'POST',
+      body: JSON.stringify({ content_id: contentId }),
+    });
+  },
+
+  /**
+   * Batch process multiple content items for internal linking
+   * @param contentIds - Array of content IDs to process
+   * @returns Array of link results
+   */
+  batchProcess: async (contentIds: number[]) => {
+    return await fetchAPI('/v1/linker/batch_process/', {
+      method: 'POST',
+      body: JSON.stringify({ content_ids: contentIds }),
+    });
+  },
+};
+

frontend/src/api/optimizer.api.ts

@@ -0,0 +1,86 @@
+import { fetchAPI } from '../services/api';
+
+/**
+ * Optimizer API Client
+ * Functions for content optimization operations
+ */
+
+export type EntryPoint = 'auto' | 'writer' | 'wordpress' | 'external' | 'manual';
+
+export interface OptimizationResult {
+  content_id: number;
+  optimizer_version: number;
+  scores_before: {
+    seo_score: number;
+    readability_score: number;
+    engagement_score: number;
+    overall_score: number;
+  };
+  scores_after: {
+    seo_score: number;
+    readability_score: number;
+    engagement_score: number;
+    overall_score: number;
+  };
+  task_id: number | null;
+  success: boolean;
+}
+
+export interface AnalysisScores {
+  seo_score: number;
+  readability_score: number;
+  engagement_score: number;
+  overall_score: number;
+  word_count: number;
+  has_meta_title: boolean;
+  has_meta_description: boolean;
+  has_primary_keyword: boolean;
+  internal_links_count: number;
+}
+
+export const optimizerApi = {
+  /**
+   * Optimize content (auto-detects entry point based on source)
+   * @param contentId - Content ID to optimize
+   * @param entryPoint - Optional entry point override (default: 'auto')
+   * @returns Optimization result with scores
+   */
+  optimize: async (contentId: number, entryPoint: EntryPoint = 'auto'): Promise<OptimizationResult> => {
+    return await fetchAPI('/v1/optimizer/optimize/', {
+      method: 'POST',
+      body: JSON.stringify({
+        content_id: contentId,
+        entry_point: entryPoint,
+      }),
+    });
+  },
+
+  /**
+   * Batch optimize multiple content items
+   * @param contentIds - Array of content IDs to optimize
+   * @param entryPoint - Optional entry point override (default: 'auto')
+   * @returns Batch optimization results
+   */
+  batchOptimize: async (contentIds: number[], entryPoint: EntryPoint = 'auto') => {
+    return await fetchAPI('/v1/optimizer/batch_optimize/', {
+      method: 'POST',
+      body: JSON.stringify({
+        content_ids: contentIds,
+        entry_point: entryPoint,
+      }),
+    });
+  },
+
+  /**
+   * Analyze content without optimizing (preview scores)
+   * @param contentId - Content ID to analyze
+   * @returns Analysis scores
+   */
+  analyze: async (contentId: number): Promise<{ content_id: number; scores: AnalysisScores }> => {
+    return await fetchAPI('/v1/optimizer/analyze/', {
+      method: 'POST',
+      body: JSON.stringify({ content_id: contentId }),
+    });
+  },
+};
+