Fix bugs and clean noise reduction

src/app/core/constants.ts

@@ -17,6 +17,9 @@ export const STORAGE_KEY_CONNECTION_SETTINGS = 'metoyou_connection_settings';
 /** Key used to persist voice settings (input/output devices, volume). */
 export const STORAGE_KEY_VOICE_SETTINGS = 'metoyou_voice_settings';
 
+/** Key used to persist per-user volume overrides (0–200%). */
+export const STORAGE_KEY_USER_VOLUMES = 'metoyou_user_volumes';
+
 /** Regex that extracts a roomId from a `/room/:roomId` URL path. */
 export const ROOM_URL_PATTERN = /\/room\/([^/]+)/;
 
@@ -34,6 +37,3 @@ export const DEFAULT_VOLUME = 100;
 
 /** Default search debounce time in milliseconds. */
 export const SEARCH_DEBOUNCE_MS = 300;
-
-/** Key used to persist voice leveling (AGC) settings. */
-export const STORAGE_KEY_VOICE_LEVELING_SETTINGS = 'metoyou_voice_leveling_settings';