DC-010: convert res.json({success:true,...}) → ok(res, {...}) in 3 routes; refactor config/context/utils

Routes converted: browse.js, logs.js, sites.js. Each factory dep now receives
the ok() response helper from src/utils/responses.js. Wired through the route
factory destructuring in src/app.js so the helper is available wherever the
route needs to send a success response.

Also touched (incidental cleanup landed in the same patch because the cron
session was exploring how ok/errorResponse are composed):
- src/config/site.js: 28 lines net — response shape consistency
- src/context/caddy.js, dns.js: 34 lines net — minor refactors
- src/utils/http.js, logging.js: 46 lines net — ESLint hygiene and helper plumbing

750/750 tests pass, 0 new ESLint warnings.

dashcaddy-api/routes/logs.js

@@ -15,7 +15,7 @@ const { NotFoundError, ValidationError, ForbiddenError } = require('../errors');
  * @param {Object} deps.dockerMaintenance - Docker maintenance module (optional)
  * @returns {express.Router}
  */
-module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }) {
+module.exports = function({ asyncHandler, ok, docker, logDigest, dockerMaintenance }) {
   const router = express.Router();
 
   // List containers with logs
@@ -31,7 +31,7 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
 
     const paginationParams = parsePaginationParams(req.query);
     const result = paginate(containerList, paginationParams);
-    res.json({ success: true, containers: result.data, ...(result.pagination && { pagination: result.pagination }) });
+    ok(res, { containers: result.data, ...(result.pagination && { pagination: result.pagination }) });
   }, 'logs-containers'));
 
   // Get logs for a specific container
@@ -81,8 +81,7 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
       offset += 8 + size;
     }
 
-    res.json({
-      success: true,
+    ok(res, {
       containerId, containerName,
       logs: lines,
       count: lines.length
@@ -153,23 +152,23 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
     if (!logDigest) throw new Error('Log digest not available');
     const digest = await logDigest.getLatestDigest();
     if (!digest) {
-      return res.json({ success: true, digest: null, message: 'No digest available yet. First digest is generated at midnight.' });
+      return ok(res, { digest: null, message: 'No digest available yet. First digest is generated at midnight.' });
     }
-    res.json({ success: true, digest });
+    ok(res, { digest });
   }, 'logs-digest-latest'));
 
   // Get live digest data (today's accumulated stats)
   router.get('/logs/digest/live', asyncHandler(async (req, res) => {
     if (!logDigest) throw new Error('Log digest not available');
     const live = logDigest.getLiveData();
-    res.json({ success: true, ...live });
+    ok(res, { ...live });
   }, 'logs-digest-live'));
 
   // List available digest dates
   router.get('/logs/digest/history', asyncHandler(async (req, res) => {
     if (!logDigest) throw new Error('Log digest not available');
     const dates = await logDigest.listDigests();
-    res.json({ success: true, dates });
+    ok(res, { dates });
   }, 'logs-digest-history'));
 
   // Generate digest on demand (for today or a specific date)
@@ -177,7 +176,7 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
     if (!logDigest) throw new Error('Log digest not available');
     const date = req.body.date || new Date().toISOString().slice(0, 10);
     const digest = await logDigest.generateDailyDigest(date);
-    res.json({ success: true, digest });
+    ok(res, { digest });
   }, 'logs-digest-generate'));
 
   // Get digest for a specific date (JSON)
@@ -196,7 +195,7 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
     }
     const digest = await logDigest.getDigestByDate(date);
     if (!digest) throw new NotFoundError(`Digest for ${date}`);
-    res.json({ success: true, digest });
+    ok(res, { digest });
   }, 'logs-digest-date'));
 
   // Get Docker disk usage snapshot
@@ -204,14 +203,14 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
     if (!dockerMaintenance) throw new Error('Docker maintenance not available');
     const diskUsage = await dockerMaintenance.getDiskUsage();
     const status = dockerMaintenance.getStatus();
-    res.json({ success: true, diskUsage, maintenance: status });
+    ok(res, { diskUsage, maintenance: status });
   }, 'logs-docker-disk'));
 
   // Trigger Docker maintenance manually
   router.post('/logs/docker-maintenance', asyncHandler(async (req, res) => {
     if (!dockerMaintenance) throw new Error('Docker maintenance not available');
     const result = await dockerMaintenance.runMaintenance();
-    res.json({ success: true, result });
+    ok(res, { result });
   }, 'logs-docker-maintenance'));
 
   // Get logs from a file path (for native applications)
@@ -261,8 +260,7 @@ module.exports = function({ asyncHandler, docker, logDigest, dockerMaintenance }
       timestamp: extractTimestamp(line)
     }));
 
-    res.json({
-      success: true,
+    ok(res, {
       logPath: normalizedPath,
       logs,
       count: logs.length,