v1.13.4: Standardize all route responses to use response helpers

Convert ~160 raw res.json()/res.status().json() calls across 32+ files
to use centralized helpers from src/utils/responses.js (ok, errorResponse,
successMessage, notFound, validationError, forbidden, unauthorized, conflict).

No behavior changes — response shapes are identical. Future schema changes
(e.g., requestId envelope) only need to update one module.

Fix error vs errorResponse signature mismatch in routes/health.js CA cert
endpoint where error(res, message, statusCode) was being called with
errorResponse(res, statusCode, message, extras) argument order.

Files changed: middleware.js, csrf-protection.js, error-handler.js,
license-manager.js, src/app.js, and 27 route files.

Test suite: 755 pass / 4 pre-existing failures (services credential tests).

dashcaddy-api/routes/sites.js

@@ -3,7 +3,7 @@ const fs = require('fs');
 const { CADDY, REGEX, LIMITS } = require('../constants');
 const { ValidationError, ConflictError, NotFoundError } = require('../errors');
 const { validateURL } = require('../input-validator');
-const { ok } = require('../src/utils/responses');
+const { ok, successMessage } = require('../src/utils/responses');
 
 /**
  * Sites route factory
@@ -24,14 +24,14 @@ module.exports = function({ asyncHandler, caddy, dns, fetchT, buildDomain, addSe
   // Get Caddyfile contents
   router.get('/caddyfile', asyncHandler(async (req, res) => {
     const content = await caddy.read();
-    res.json({ success: true, content });
+    ok(res, { content });
   }, 'caddyfile-get'));
 
   // Get current Caddy config (from admin API)
   router.get('/caddy/config', asyncHandler(async (req, res) => {
     const response = await fetchT(`${caddy.adminUrl}/config/`);
     const config = await response.json();
-    res.json({ success: true, config });
+    ok(res, { config });
   }, 'caddy-config'));
 
   // Reload Caddy configuration via admin API
@@ -50,7 +50,7 @@ module.exports = function({ asyncHandler, caddy, dns, fetchT, buildDomain, addSe
       throw new Error('Caddy reload failed. Check server logs for details.');
     }
 
-    res.json({ success: true, message: 'Caddy configuration reloaded successfully' });
+    successMessage(res, 'Caddy configuration reloaded successfully');
   }, 'caddy-reload'));
 
   // Get Certificate Authorities from Caddyfile
@@ -153,7 +153,7 @@ module.exports = function({ asyncHandler, caddy, dns, fetchT, buildDomain, addSe
       throw new NotFoundError(`Site block for "" in Caddyfile`);
     }
 
-    res.json({ success: true, message: `Site "${domain}" removed from Caddyfile and Caddy reloaded` });
+    successMessage(res, `Site "${domain}" removed from Caddyfile and Caddy reloaded`);
   }, 'site-delete'));
 
   // Add a new site to Caddyfile and reload
@@ -181,7 +181,7 @@ module.exports = function({ asyncHandler, caddy, dns, fetchT, buildDomain, addSe
         result.rolledBack ? { note: 'Caddyfile was rolled back to previous state' } : {});
     }
 
-    res.json({ success: true, message: `Site "${domain}" added to Caddyfile and Caddy reloaded successfully` });
+    successMessage(res, `Site "${domain}" added to Caddyfile and Caddy reloaded successfully`);
   }, 'site-add'));
 
   // Add external service reverse proxy to Caddyfile
@@ -261,12 +261,11 @@ module.exports = function({ asyncHandler, caddy, dns, fetchT, buildDomain, addSe
         }
       }
 
-      const response = {
-        success: true,
+      const responseData = {
         message: `External service proxy for ${domain} -> ${externalUrl} created${shouldReload ? ' and Caddy reloaded' : ''}`
       };
-      if (dnsWarning) response.warning = dnsWarning;
-      res.json(response);
+      if (dnsWarning) responseData.warning = dnsWarning;
+      ok(res, responseData);
   }, 'site-external'));
 
   return router;