feat: enhance Jira analytics with caching and force refresh

- Updated `getJiraAnalytics` to accept a `forceRefresh` parameter for optional cache bypass.
- Modified `getProjectAnalytics` to check the cache and return cached data unless forced to refresh.
- Adjusted `loadAnalytics` in `useJiraAnalytics` to trigger a forced refresh on manual updates.
- Improved UI in `JiraDashboardPageClient` to indicate when data is served from cache.

services/jira-analytics.ts

@@ -4,14 +4,15 @@
  */
 
 import { JiraService } from './jira';
-import { 
-  JiraAnalytics, 
+import { jiraAnalyticsCache } from './jira-analytics-cache';
+import {
+  JiraAnalytics,
   JiraTask,
-  AssigneeDistribution, 
-  SprintVelocity, 
-  CycleTimeByType, 
-  StatusDistribution, 
-  AssigneeWorkload 
+  AssigneeDistribution,
+  SprintVelocity,
+  CycleTimeByType,
+  StatusDistribution,
+  AssigneeWorkload
 } from '@/lib/types';
 
 export interface JiraAnalyticsConfig {
@@ -24,18 +25,28 @@ export interface JiraAnalyticsConfig {
 export class JiraAnalyticsService {
   private jiraService: JiraService;
   private projectKey: string;
+  private config: JiraAnalyticsConfig;
 
   constructor(config: JiraAnalyticsConfig) {
     this.jiraService = new JiraService(config);
     this.projectKey = config.projectKey;
+    this.config = config;
   }
 
   /**
-   * Récupère toutes les analytics du projet
+   * Récupère toutes les analytics du projet avec cache
    */
-  async getProjectAnalytics(): Promise<JiraAnalytics> {
+  async getProjectAnalytics(forceRefresh = false): Promise<JiraAnalytics> {
     try {
-      console.log(`📊 Début de l'analyse du projet ${this.projectKey}...`);
+      // Vérifier le cache d'abord (sauf si forceRefresh)
+      if (!forceRefresh) {
+        const cachedAnalytics = jiraAnalyticsCache.get(this.config);
+        if (cachedAnalytics) {
+          return cachedAnalytics;
+        }
+      }
+
+      console.log(`🔄 Calcul des analytics Jira pour projet ${this.projectKey} ${forceRefresh ? '(actualisation forcée)' : '(cache manquant)'}`);
 
       // Récupérer les informations du projet
       const projectInfo = await this.getProjectInfo();
@@ -57,7 +68,7 @@ export class JiraAnalyticsService {
         this.calculateWorkInProgress(allIssues)
       ]);
 
-      return {
+      const analytics: JiraAnalytics = {
         project: {
           key: this.projectKey,
           name: projectInfo.name,
@@ -69,12 +80,24 @@ export class JiraAnalyticsService {
         workInProgress
       };
 
+      // Mettre en cache le résultat
+      jiraAnalyticsCache.set(this.config, analytics);
+
+      return analytics;
+
     } catch (error) {
       console.error('Erreur lors du calcul des analytics:', error);
       throw error;
     }
   }
 
+  /**
+   * Invalide le cache pour ce projet
+   */
+  invalidateCache(): void {
+    jiraAnalyticsCache.invalidate(this.config);
+  }
+
   /**
    * Récupère les informations de base du projet
    */