feat: add project key support for Jira analytics

- Introduced `projectKey` and `ignoredProjects` fields in Jira configuration to enhance analytics capabilities.
- Implemented project validation logic in `JiraConfigClient` and integrated it into the `JiraConfigForm` for user input.
- Updated `IntegrationsSettingsPageClient` to display analytics dashboard link based on the configured project key.
- Enhanced API routes to handle project key in Jira sync and user preferences.
- Marked related tasks as complete in `TODO.md`.

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

@@ -0,0 +1,70 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { createJiraService } from '@/services/jira';
+import { userPreferencesService } from '@/services/user-preferences';
+
+/**
+ * POST /api/jira/validate-project
+ * Valide l'existence d'un projet Jira
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json();
+    const { projectKey } = body;
+
+    if (!projectKey || typeof projectKey !== 'string') {
+      return NextResponse.json(
+        { error: 'projectKey est requis' },
+        { status: 400 }
+      );
+    }
+
+    // Récupérer la config Jira depuis la base de données
+    const jiraConfig = await userPreferencesService.getJiraConfig();
+    
+    if (!jiraConfig.enabled || !jiraConfig.baseUrl || !jiraConfig.email || !jiraConfig.apiToken) {
+      return NextResponse.json(
+        { error: 'Configuration Jira manquante. Configurez Jira dans les paramètres.' },
+        { status: 400 }
+      );
+    }
+
+    // Créer le service Jira
+    const jiraService = createJiraService();
+    if (!jiraService) {
+      return NextResponse.json(
+        { error: 'Impossible de créer le service Jira. Vérifiez la configuration.' },
+        { status: 500 }
+      );
+    }
+
+    // Valider le projet
+    const validation = await jiraService.validateProject(projectKey.trim().toUpperCase());
+    
+    if (validation.exists) {
+      return NextResponse.json({
+        success: true,
+        exists: true,
+        projectName: validation.name,
+        message: `Projet "${projectKey}" trouvé : ${validation.name}`
+      });
+    } else {
+      return NextResponse.json({
+        success: false,
+        exists: false,
+        error: validation.error,
+        message: validation.error || `Projet "${projectKey}" introuvable`
+      }, { status: 404 });
+    }
+
+  } catch (error) {
+    console.error('Erreur lors de la validation du projet Jira:', error);
+    return NextResponse.json(
+      { 
+        success: false,
+        error: 'Erreur lors de la validation du projet',
+        message: error instanceof Error ? error.message : 'Erreur inconnue'
+      },
+      { status: 500 }
+    );
+  }
+}