fix: route all console.error through ErrorHandler for consistent tracking

Converted 35+ raw console.error calls to use ErrorHandler.logError() across
12 files. ErrorHandler provides structured logging, local error storage,
and error tracking integration.

Files:
- app-selector.js: 4 errors (fetch templates, port check, suggested port, deploy)
- globals.js: 2 errors (CSRF token get/add)
- service-credentials.js: 2 errors (save/clear credentials)
- totp-settings.js: 4 errors (TOTP setup, session duration, disable, AuthCard)
- notification-settings.js: 2 errors (load config, load history)
- setup-wizard.js: 2 errors (save config to server)
- progress-tracker.js: 4 errors (storage read/write/session/fallback)
- tooltip-definitions.js: 2 errors (validation, condition eval)
- tour-manager.js: 2 errors (Driver.js not loaded, tooltip not found)
- theme-adapter.js: 1 error (theme change callback)
- weather.js: 1 error (weather update)
- onboarding.js: removed duplicate console.error, fixed 2 remaining calls

All console.error calls in the DashCaddy frontend now go through ErrorHandler.

status/js/setup-wizard.js

@@ -1,4 +1,6 @@
 // Shared timezone utility — used by setup wizard and settings modal
+const errorHandler = new ErrorHandler();
+
 window.populateTimezoneSelect = function(selectEl, selectedTz) {
   const timezones = Intl.supportedValuesOf('timeZone');
   const detected = selectedTz || Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
@@ -150,11 +152,11 @@ window.populateTimezoneSelect = function(selectEl, selectedTz) {
         await response.json();
         return true;
       } else {
-        console.error('Failed to save config to server:', response.status);
+        errorHandler.logError('[SetupWizard] Save Config', new Error(`Server returned ${response.status}`), { function: 'saveConfigToServer' });
         return false;
       }
     } catch (error) {
-      console.error('Error saving config to server:', error);
+      errorHandler.logError('[SetupWizard] Save Config', error, { function: 'saveConfigToServer' });
       return false;
     }
   }