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`.

lib/types.ts

@@ -84,6 +84,7 @@ export interface JiraConfig {
   email?: string;
   apiToken?: string;
   enabled: boolean;
+  projectKey?: string; // Clé du projet à surveiller pour les analytics d'équipe (ex: "MYTEAM")
   ignoredProjects?: string[]; // Liste des clés de projets à ignorer (ex: ["DEMO", "TEST"])
 }
 
@@ -147,6 +148,73 @@ export interface JiraTask {
   labels: string[];
 }
 
+// Types pour l'analytics Jira
+export interface JiraAnalytics {
+  project: {
+    key: string;
+    name: string;
+    totalIssues: number;
+  };
+  teamMetrics: {
+    totalAssignees: number;
+    activeAssignees: number;
+    issuesDistribution: AssigneeDistribution[];
+  };
+  velocityMetrics: {
+    currentSprintPoints: number;
+    averageVelocity: number;
+    sprintHistory: SprintVelocity[];
+  };
+  cycleTimeMetrics: {
+    averageCycleTime: number; // en jours
+    cycleTimeByType: CycleTimeByType[];
+  };
+  workInProgress: {
+    byStatus: StatusDistribution[];
+    byAssignee: AssigneeWorkload[];
+  };
+}
+
+export interface AssigneeDistribution {
+  assignee: string;
+  displayName: string;
+  totalIssues: number;
+  completedIssues: number;
+  inProgressIssues: number;
+  percentage: number;
+}
+
+export interface SprintVelocity {
+  sprintName: string;
+  startDate: string;
+  endDate: string;
+  completedPoints: number;
+  plannedPoints: number;
+  completionRate: number;
+}
+
+export interface CycleTimeByType {
+  issueType: string;
+  averageDays: number;
+  medianDays: number;
+  samples: number;
+}
+
+export interface StatusDistribution {
+  status: string;
+  count: number;
+  percentage: number;
+}
+
+export interface AssigneeWorkload {
+  assignee: string;
+  displayName: string;
+  todoCount: number;
+  inProgressCount: number;
+  reviewCount: number;
+  totalActive: number;
+}
+
 // Types pour l'API
 export interface ApiResponse<T> {
   data?: T;