simplify darkmode ui toggle.

webapp/frontend/src/@treo/services/config/config.service.ts

@@ -13,15 +13,12 @@ export class TreoConfigService
 {
     // Private
     private _config: BehaviorSubject<any>;
-    private systemPrefersDark: boolean;
 
     /**
      * Constructor
      */
     constructor(@Inject(TREO_APP_CONFIG) defaultConfig: any)
     {
-        this.systemPrefersDark = window.matchMedia && window.matchMedia("(prefers-color-scheme: dark)").matches;
-
         let currentScrutinyConfig = defaultConfig
 
         let localConfigStr = localStorage.getItem(SCRUTINY_CONFIG_LOCAL_STORAGE_KEY)
@@ -30,9 +27,6 @@ export class TreoConfigService
             let localConfig = JSON.parse(localConfigStr)
             currentScrutinyConfig = Object.assign({}, localConfig, currentScrutinyConfig) // make sure defaults are available if missing from localStorage.
         }
-
-        currentScrutinyConfig.theme = this.determineTheme(currentScrutinyConfig);
-
         // Set the private defaults
         this._config = new BehaviorSubject(currentScrutinyConfig);
     }
@@ -53,8 +47,6 @@ export class TreoConfigService
         //Store the config in localstorage
         localStorage.setItem(SCRUTINY_CONFIG_LOCAL_STORAGE_KEY, JSON.stringify(config));
 
-        config.theme = this.determineTheme(config);
-
         // Execute the observable
         this._config.next(config);
     }
@@ -69,13 +61,6 @@ export class TreoConfigService
     // @ Private methods
     // -----------------------------------------------------------------------------------------------------
 
-    /**
-     * Checks if theme should be set to dark based on config & system settings
-     */
-    private determineTheme(config:AppConfig): string {
-        return (config.themeUseSystem && this.systemPrefersDark) ? "dark" :  config.theme;
-    }
-
     // -----------------------------------------------------------------------------------------------------
     // @ Public methods
     // -----------------------------------------------------------------------------------------------------