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/controllers/dashboardController.js

@@ -0,0 +1,39 @@
+import dashboardService from '../services/dashboardService.js';
+
+function getHashedUserId(req) {
+    return req.headers?.userid;
+}
+
+export default {
+    async getConfig(req, res) {
+        const hashedUserId = getHashedUserId(req);
+        if (!hashedUserId) {
+            return res.status(401).json({ error: 'Unauthorized' });
+        }
+        try {
+            const config = await dashboardService.getConfig(hashedUserId);
+            res.json(config);
+        } catch (error) {
+            console.error('Dashboard getConfig:', error);
+            res.status(500).json({ error: error.message || 'Internal server error' });
+        }
+    },
+
+    async setConfig(req, res) {
+        const hashedUserId = getHashedUserId(req);
+        if (!hashedUserId) {
+            return res.status(401).json({ error: 'Unauthorized' });
+        }
+        const config = req.body;
+        if (!config || typeof config !== 'object') {
+            return res.status(400).json({ error: 'Invalid config' });
+        }
+        try {
+            const result = await dashboardService.setConfig(hashedUserId, config);
+            res.json(result);
+        } catch (error) {
+            console.error('Dashboard setConfig:', error);
+            res.status(500).json({ error: error.message || 'Internal server error' });
+        }
+    }
+};