refactor: event delegation, unified subscription cleanup, centralized listing status helpers

js/components/pages/page-settings.js

@@ -23,23 +23,24 @@ class PageSettings extends HTMLElement {
         this.render()
         this.setupEventListeners()
         
-        this.unsubscribe = i18n.subscribe(() => {
+        this._unsubs = []
+        this._unsubs.push(i18n.subscribe(() => {
             this.render()
             this.setupEventListeners()
-        })
+        }))
         
-        this.authUnsubscribe = auth.subscribe(() => {
+        this._unsubs.push(auth.subscribe(() => {
             this.isLoggedIn = auth.isLoggedIn()
             
             if (!this.isLoggedIn) {
                 window.location.hash = '#/'
             }
-        })
+        }))
     }
 
     disconnectedCallback() {
-        if (this.unsubscribe) this.unsubscribe()
-        if (this.authUnsubscribe) this.authUnsubscribe()
+        this._unsubs.forEach(fn => fn())
+        this._unsubs = []
     }
 
     setupEventListeners() {