chore: Show toast for app restart when User-Agent is changed

CHANGELOG.md

@@ -18,6 +18,7 @@ The format is simplified version of [Keep a Changelog](https://keepachangelog.co
 ### Changes
 - Enable 'Split Tall Images' by default (@Smol-Ame)
 - Minor visual adjustments
+- Tell user to restart the app when User-Agent is changed (@NGB-Was-Taken)
 
 ### Fixes
 - Fixed only few DoH provider is actually being used (Cloudflare, Google, AdGuard, and Quad9)

app/src/main/java/eu/kanade/tachiyomi/ui/setting/controllers/SettingsAdvancedController.kt

@@ -305,6 +305,7 @@ class SettingsAdvancedController : SettingsLegacyController() {
                         context.toast(MR.strings.error_user_agent_string_invalid)
                         return@onChange false
                     }
+                    context.toast(MR.strings.requires_app_restart)
                     true
                 }
             }