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/config/settings.js

@@ -2,6 +2,7 @@ const fsp = require('fs').promises;
 const { validateConfig } = require('../../config-schema');
 const { exists } = require('../../fs-helpers');
 const { ValidationError } = require('../../errors');
+const { ok, successMessage } = require('../../src/utils/responses');
 
 /**
  * Config settings routes factory
@@ -71,14 +72,14 @@ module.exports = function({ configStateManager: _configStateManager, asyncHandle
     }
     log.info('config', 'Config saved', { path: ctx.CONFIG_FILE });
 
-    res.json({ success: true, message: 'Configuration saved', config, warnings });
+    ok(res, { message: 'Configuration saved', config, warnings });
   }, 'config-save'));
 
   router.delete('/config', asyncHandler(async (req, res) => {
     if (await exists(ctx.CONFIG_FILE)) {
       await fsp.unlink(ctx.CONFIG_FILE);
     }
-    res.json({ success: true, message: 'Configuration reset' });
+    successMessage(res, 'Configuration reset');
   }, 'config-delete'));
 
   return router;