feat: use platform displayName from RemnaWave config in connection page

Add displayName to RemnawavePlatformData type and prioritize it
in getPlatformDisplayName over hardcoded fallback names.

src/types/index.ts

@@ -530,6 +530,7 @@ export interface RemnawaveAppClient {
 
 export interface RemnawavePlatformData {
   svgIconKey?: string;
+  displayName?: LocalizedText;
   apps: RemnawaveAppClient[];
 }