feat: Implement GitHub Models Service for microblog content generation

- Added GitHubModelsService to handle content generation using OpenAI's GPT-4o model.
- Introduced tone guidelines for generating content in different styles (technical, casual, motivational).
- Created methods for generating microblog content, validating environment variables, and handling retries.
- Implemented a factory pattern for LangChain services to manage instances and configurations.
- Developed LangChainMicroblogService for generating microblog content with structured output parsing.
- Added error handling and validation utilities for API requests and content generation.
- Established rate limiting and retry mechanisms to enhance API reliability.
- Created prompt services to standardize system and user prompts for content generation.
- Added utility functions for formatting hashtags and managing character counts.
- Enhanced error classification and retry management for robust error handling.

Author: glaucia86

src/app/api/generate/route.ts

@@ -1,8 +1,8 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { getContentGenerationService } from '@/lib/services/content-generation.service';
-import { validateApiRequest } from '@/lib/utils/api-validation';
-import { checkRateLimit } from '../../../lib/utils/rate-limiting';
-import { handleApiError } from '@/lib/utils/error-handler';
+import { getContentGenerationService } from '@/shared/services/content-generation.service';
+import { validateApiRequest } from '../../../shared/utils/api-validation';
+import { checkRateLimit } from '../../../shared/utils/rate-limiting';
+import { handleApiError } from '../../../shared/utils/error-handler';
 import type { GenerateApiRequest, GenerateApiResponse } from '@/types';
 
 export async function POST(request: NextRequest) {

src/app/api/migration-status/route.ts

@@ -1,6 +1,6 @@
 import { NextResponse } from 'next/server';
-import { LangChainService } from '../../../lib/services/langchain.factory';
-import { getContentGenerationService } from '../../../lib/services/content-generation.service';
+import { LangChainService } from '../../../shared/services/langchain.factory';
+import { getContentGenerationService } from '../../../shared/services/content-generation.service';
 
 export async function GET() {
   try {

src/app/api/test-migration/route.ts

@@ -1,6 +1,6 @@
 import { NextResponse } from 'next/server';
-import { LangChainService } from '../../../lib/services/langchain.factory';
-import { getContentGenerationService } from '../../../lib/services/content-generation.service';
+import { LangChainService } from '../../../shared/services/langchain.factory';
+import { getContentGenerationService } from '../../../shared/services/content-generation.service';
 
 export async function GET() {
   try {

src/app/components/PreviewCard.tsx

@@ -2,7 +2,7 @@
 
 import React from 'react';
 import { GeneratedContent } from '@/types';
-import { formatHashtags, createFullContent } from '@/lib/utils/formatting';
+import { formatHashtags, createFullContent } from '../../shared/utils/formatting';
 import { useCopyToClipboard } from '../../hooks/useCopyToClipboard';
 import { ContentSection } from './preview/ContentSection';
 import { HashtagsDisplay } from './preview/HashtagsDisplay';

src/app/components/generation/GenerationForm.tsx

@@ -4,7 +4,7 @@ import React from 'react';
 import { FormState, ToneOfVoice, GenerateApiRequest } from '@/types';
 import { MICROBLOG_LIMITS } from '@/lib/constants/app';
 import EnhancedTextInput from '../EnhancedTextInput';
-import ToneSelector from '../ToneSelector';
+import ToneSelector from '../../components/tone/ToneSelector';
 import CharacterCounter from '../CharacterCounter';
 
 interface GenerationFormProps {

src/app/components/index.ts

@@ -5,9 +5,7 @@ export { default as EnhancedTextInput } from './EnhancedTextInput';
 export { default as LoadingOverlay } from './LoadingOverlay';
 export { default as PreviewCard } from './PreviewCard';
 export { default as SuccessNotification } from './SuccessNotification';
-export { default as ToneSelector } from './ToneSelector';
-
-// Preview components
+export { default as ToneSelector } from '../components/tone/ToneSelector';
 export * from './preview/CopyButton';
 export * from './preview/ContentSection';
 export * from './preview/HashtagsDisplay';

src/hooks/useFormValidation.ts

@@ -1,5 +1,5 @@
 import { useState, useCallback } from 'react';
-import { validateFormData, ValidationResult } from '@/lib/utils/validation';
+import { validateFormData, ValidationResult } from '../shared/utils/validation';
 import { FormState, ToneOfVoice } from '@/types';
 
 interface UseFormValidationReturn {

src/lib/index.ts

@@ -5,16 +5,9 @@ export * from './constants/tones';
 // Data
 export * from './data/features';
 
-// Utils
-export * from './utils/validation';
-export * from './utils/formatting';
-export * from './utils/api-validation';
-export * from './utils/rate-limiting';
-export * from './utils/error-handler';
-
 // Services
-export * from './services/content-generation.service';
-export * from './services/prompt.services';
+export * from '../shared/services/content-generation.service';
+export * from '../shared/services/prompt.services';
 
 // Errors
 export * from './errors/app-errors';