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`.

components/settings/IntegrationsSettingsPageClient.tsx

@@ -125,6 +125,26 @@ export function IntegrationsSettingsPageClient({
               <div className="space-y-4">
                 {initialJiraConfig?.enabled && (
                   <>
+                    {/* Dashboard Analytics */}
+                    {initialJiraConfig.projectKey && (
+                      <Card>
+                        <CardHeader>
+                          <h3 className="text-sm font-semibold">📊 Analytics d&apos;équipe</h3>
+                        </CardHeader>
+                        <CardContent className="space-y-3">
+                          <p className="text-xs text-[var(--muted-foreground)]">
+                            Surveillance du projet {initialJiraConfig.projectKey}
+                          </p>
+                          <Link 
+                            href="/jira-dashboard"
+                            className="inline-flex items-center justify-center w-full px-3 py-2 text-sm font-medium bg-[var(--primary)] text-[var(--primary-foreground)] rounded-lg hover:bg-[var(--primary)]/90 transition-colors"
+                          >
+                            Voir le Dashboard
+                          </Link>
+                        </CardContent>
+                      </Card>
+                    )}
+                    
                     <JiraSync />
                     <JiraLogs />
                   </>