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/src/config/site.js

@@ -19,6 +19,21 @@ const siteConfig = {
   routingMode: 'subdomain'
 };
 
+function applyRawConfig(raw) {
+  siteConfig.tld = raw.tld || '.home';
+  if (!siteConfig.tld.startsWith('.')) siteConfig.tld = '.' + siteConfig.tld;
+  siteConfig.caName = raw.caName || '';
+  siteConfig.dnsServerIp = (raw.dns && raw.dns.ip) || '';
+  siteConfig.dnsServerPort = (raw.dns && raw.dns.port) || CADDY.DEFAULT_DNS_PORT;
+  siteConfig.dashboardHost = raw.dashboardHost || `status${siteConfig.tld}`;
+  siteConfig.timezone = raw.timezone || 'UTC';
+  siteConfig.dnsServers = raw.dnsServers || {};
+  siteConfig.configurationType = raw.configurationType || 'homelab';
+  siteConfig.domain = raw.domain || '';
+  siteConfig.routingMode = raw.routingMode || 'subdomain';
+  siteConfig.pylon = raw.pylon || null;
+}
+
 function loadSiteConfig(CONFIG_FILE, log) {
   try {
     if (fs.existsSync(CONFIG_FILE)) {
@@ -35,18 +50,7 @@ function loadSiteConfig(CONFIG_FILE, log) {
         }
       }
 
-      siteConfig.tld = raw.tld || '.home';
-      if (!siteConfig.tld.startsWith('.')) siteConfig.tld = '.' + siteConfig.tld;
-      siteConfig.caName = raw.caName || '';
-      siteConfig.dnsServerIp = (raw.dns && raw.dns.ip) || '';
-      siteConfig.dnsServerPort = (raw.dns && raw.dns.port) || CADDY.DEFAULT_DNS_PORT;
-      siteConfig.dashboardHost = raw.dashboardHost || `status${siteConfig.tld}`;
-      siteConfig.timezone = raw.timezone || 'UTC';
-      siteConfig.dnsServers = raw.dnsServers || {};
-      siteConfig.configurationType = raw.configurationType || 'homelab';
-      siteConfig.domain = raw.domain || '';
-      siteConfig.routingMode = raw.routingMode || 'subdomain';
-      siteConfig.pylon = raw.pylon || null;
+      applyRawConfig(raw);
     }
   } catch (e) {
     if (log && log.error) {