Add dashboard functionality: Integrate dashboardRouter and UserDashboard model, enabling user-specific dashboard configurations. Update LoggedInView to support dynamic widget management, including adding, removing, and saving widget configurations, enhancing user experience and interactivity.

backend/services/dashboardService.js

@@ -0,0 +1,37 @@
+import BaseService from './BaseService.js';
+import UserDashboard from '../models/community/user_dashboard.js';
+
+class DashboardService extends BaseService {
+    /**
+     * @param {string} hashedUserId
+     * @returns {Promise<{ widgets: Array<{ id: string, title: string, endpoint: string }> }>}
+     */
+    async getConfig(hashedUserId) {
+        const user = await this.getUserByHashedId(hashedUserId);
+        const row = await UserDashboard.findOne({ where: { userId: user.id } });
+        const config = row?.config ?? { widgets: [] };
+        if (!Array.isArray(config.widgets)) config.widgets = [];
+        return config;
+    }
+
+    /**
+     * @param {string} hashedUserId
+     * @param {{ widgets: Array<{ id: string, title: string, endpoint: string }> }} config
+     */
+    async setConfig(hashedUserId, config) {
+        const user = await this.getUserByHashedId(hashedUserId);
+        const widgets = Array.isArray(config?.widgets) ? config.widgets : [];
+        const sanitized = widgets.map(w => ({
+            id: String(w?.id ?? ''),
+            title: String(w?.title ?? ''),
+            endpoint: String(w?.endpoint ?? '')
+        })).filter(w => w.id && (w.title || w.endpoint));
+        await UserDashboard.upsert({
+            userId: user.id,
+            config: { widgets: sanitized }
+        }, { conflictFields: ['userId'] });
+        return { widgets: sanitized };
+    }
+}
+
+export default new DashboardService();