feat: connect RemnaWave baseTranslations and fix SVG icons

- Wire baseTranslations from RemnaWave config to connection page UI
  (copyLink, openApp, installApp, addSubscription, connectAndUse,
  tutorial, close) with locale fallback: current lang → en → ru → first
- Add tutorial button when baseSettings.isShowTutorialButton is enabled
- Fix SVG icon rendering on admin apps settings page with proper scaling
- Add colored circle backgrounds for block and app icons in admin panel
- Add tutorial translation key to all locale files

src/locales/zh.json

@@ -298,7 +298,8 @@
       "changeApp": "更换应用",
       "selectPlatform": "选择平台",
       "app": "个应用",
-      "apps": "个应用"
+      "apps": "个应用",
+      "tutorial": "教程"
     },
     "additionalOptions": {
       "title": "附加选项",