fix(routes): restore ctx access in 15 route files broken by Phase 2.1 refactor

The modular refactor changed function signatures to destructured deps but
left internal ctx.* references intact, causing "ctx is not defined" errors
on /api/config, /api/logo, and many other endpoints. Also implements
loadTotpConfig and saveTotpConfig which were left as stubs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dashcaddy-api/routes/config/assets.js

@@ -22,7 +22,8 @@ try {
   // Image processing libraries not available — favicon conversion disabled
 }
 
-module.exports = function({ servicesStateManager, asyncHandler, log }) {
+module.exports = function(ctx) {
+  const { servicesStateManager, asyncHandler, log } = ctx;
   const router = express.Router();
 
   // ===== ASSET UPLOAD =====

dashcaddy-api/routes/config/index.js

@@ -35,8 +35,8 @@ module.exports = function(ctx) {
     saveTotpConfig: ctx.saveTotpConfig
   };
   
-  router.use(require('./settings')(baseDeps));
-  router.use(require('./assets')({ ...baseDeps, CONFIG_FILE: ctx.CONFIG_FILE, readConfig: ctx.readConfig, saveConfig: ctx.saveConfig, errorResponse: ctx.errorResponse }));
+  router.use(require('./settings')(ctx));
+  router.use(require('./assets')(ctx));
   router.use(require('./backup')(backupDeps));
   return router;
 };

dashcaddy-api/routes/config/settings.js

@@ -3,15 +3,13 @@ const { validateConfig } = require('../../config-schema');
 const { exists } = require('../../fs-helpers');
 const { ValidationError } = require('../../errors');
 
-module.exports = function({ configStateManager, asyncHandler, log }) {
 /**
  * Config settings routes factory
- * @param {Object} deps - Explicit dependencies
- * @param {Object} deps.configStateManager - Config state manager
- * @param {Function} deps.asyncHandler - Async route handler wrapper
- * @param {Object} deps.log - Logger instance
+ * @param {Object} ctx - Application context
  * @returns {express.Router}
  */
+module.exports = function(ctx) {
+  const { configStateManager, asyncHandler, log } = ctx;
   const express = require('express');
   const router = express.Router();