Respect persisted danmaku API setting

components/PasswordGate.tsx

@@ -3,7 +3,7 @@
 import { useState, useEffect } from 'react';
 import { getSession, setSession } from '@/lib/store/auth-store';
 import { useSubscriptionSync } from '@/lib/hooks/useSubscriptionSync';
-import { settingsStore } from '@/lib/store/settings-store';
+import { hasStoredAppSetting, settingsStore } from '@/lib/store/settings-store';
 import { useIPTVStore } from '@/lib/store/iptv-store';
 import { Lock } from 'lucide-react';
 
@@ -54,12 +54,10 @@ function syncMergeSources(rawValue: string) {
 }
 
 function syncDanmakuApiUrl(rawValue: string) {
-    if (!rawValue) return;
-
-    const buildTimeValue = process.env.NEXT_PUBLIC_DANMAKU_API_URL || '';
+    if (!rawValue || hasStoredAppSetting('danmakuApiUrl')) return;
 
     const settings = settingsStore.getSettings();
-    if (!settings.danmakuApiUrl || settings.danmakuApiUrl === buildTimeValue) {
+    if (settings.danmakuApiUrl !== rawValue) {
         settingsStore.saveSettings({
             ...settings,
             danmakuApiUrl: rawValue,

lib/store/settings-store.ts

@@ -139,6 +139,24 @@ function getDefaultAppSettings(): AppSettings {
   };
 }
 
+export function hasStoredAppSetting(key: keyof AppSettings): boolean {
+  if (typeof window === 'undefined') {
+    return false;
+  }
+
+  const stored = localStorage.getItem(SETTINGS_KEY);
+  if (!stored) {
+    return false;
+  }
+
+  try {
+    const parsed = JSON.parse(stored);
+    return Object.prototype.hasOwnProperty.call(parsed, key);
+  } catch {
+    return false;
+  }
+}
+
 export const settingsStore = {
   getSettings(): AppSettings {
     // SSR: Return defaults