feat(source2): lock dark mode, sans-serif typography, and all recent updates

backend/routes/dashboard/deviceLabeling.js

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+// backend/routes/dashboard/deviceLabeling.js
+// ─────────────────────────────────────────────────────────────────────────────
+// BackOne Device Labeling Sub-router (Modular Version for Rule 3 Compliance)
+// Tanggung jawab: Mengatur otorisasi dan mendaftarkan route untuk labeling.
+// ─────────────────────────────────────────────────────────────────────────────
+
+const express = require('express');
+const router  = express.Router();
+
+const updateLabelHandler = require('./deviceLabeling/updateLabel');
+const getLabelingHandler = require('./deviceLabeling/getLabeling');
+const getMacDetailsHandler = require('./deviceLabeling/getMacDetails');
+
+// POST /api/dashboard/devices/update-label
+router.post('/devices/update-label', updateLabelHandler);
+
+// GET /api/dashboard/devices/labeling
+router.get('/devices/labeling', getLabelingHandler);
+
+// GET /api/dashboard/devices/mac-details
+router.get('/devices/mac-details', getMacDetailsHandler);
+
+module.exports = router;