feat: refactor service organization and update imports

- Introduced a new structure for services in `src/services/` to improve organization by domain, including core, analytics, data management, integrations, and task management.
- Moved relevant files to their new locations and updated all internal and external imports accordingly.
- Updated `TODO.md` to reflect the new service organization and outlined phases for further refactoring.

src/app/api/jira/logs/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { prisma } from '@/services/database';
+import { prisma } from '@/services/core/database';
 
 /**
  * Route GET /api/jira/logs

src/app/api/jira/sync/route.ts

@@ -1,6 +1,6 @@
 import { NextResponse } from 'next/server';
 import { createJiraService, JiraService } from '@/services/jira';
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 import { jiraScheduler } from '@/services/jira-scheduler';
 
 /**

src/app/api/jira/validate-project/route.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { createJiraService } from '@/services/jira';
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 
 /**
  * POST /api/jira/validate-project

src/app/api/user-preferences/jira-config/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 import { JiraConfig } from '@/lib/types';
 
 /**

src/app/api/user-preferences/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 
 /**
  * GET /api/user-preferences - Récupère toutes les préférences utilisateur

src/app/jira-dashboard/page.tsx

@@ -1,4 +1,4 @@
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 import { JiraDashboardPageClient } from './JiraDashboardPageClient';
 
 // Force dynamic rendering

src/app/layout.tsx

@@ -4,7 +4,7 @@ import "./globals.css";
 import { ThemeProvider } from "@/contexts/ThemeContext";
 import { JiraConfigProvider } from "@/contexts/JiraConfigContext";
 import { UserPreferencesProvider } from "@/contexts/UserPreferencesContext";
-import { userPreferencesService } from "@/services/user-preferences";
+import { userPreferencesService } from "@/services/core/user-preferences";
 
 const geistSans = Geist({
   variable: "--font-geist-sans",

src/app/settings/integrations/page.tsx

@@ -1,4 +1,4 @@
-import { userPreferencesService } from '@/services/user-preferences';
+import { userPreferencesService } from '@/services/core/user-preferences';
 import { IntegrationsSettingsPageClient } from '@/components/settings/IntegrationsSettingsPageClient';
 
 // Force dynamic rendering for real-time data

src/app/settings/page.tsx

@@ -1,4 +1,4 @@
-import { SystemInfoService } from '@/services/system-info';
+import { SystemInfoService } from '@/services/core/system-info';
 import { SettingsIndexPageClient } from '@/components/settings/SettingsIndexPageClient';
 
 // Force dynamic rendering (no static generation)