chore: 更新 VNDB 图像代理 URL

- 更新 `SettingsModal.vue` 中 VNDB 图像代理的输入框占位符。
- 同步修改 `settings.ts` 中 `DEFAULT_API_CONFIG` 的默认代理地址。

src/components/SettingsModal.vue

@@ -366,7 +366,7 @@
                   <input
                     v-model="localVndbImageProxyUrl"
                     type="url"
-                    placeholder="https://rp.searchgal.homes/"
+                    placeholder="https://rpx.searchgal.homes/"
                     class="api-input w-full px-4 py-3 text-sm rounded-xl bg-slate-50 dark:bg-slate-800/80 shadow-inner focus:shadow-lg focus:shadow-cyan-500/10 transition-all duration-200 outline-none border-2 border-transparent focus:border-cyan-500 text-gray-800 dark:text-slate-100 placeholder:text-gray-400"
                     @input="handleTyping"
                   />

src/stores/settings.ts

@@ -24,7 +24,7 @@ export interface UserSettings {
 // 默认 API 配置
 export const DEFAULT_API_CONFIG = {
   vndbApiBaseUrl: 'https://api.vndb.org/kana',
-  vndbImageProxyUrl: 'https://rp.searchgal.homes/',
+  vndbImageProxyUrl: 'https://rpx.searchgal.homes/',
   aiTranslateApiUrl: 'https://ai.searchgal.homes/v1/chat/completions',
   aiTranslateApiKey: 'sk-Md5kXePgq6HJjPa1Cf3265511bEe4e4c888232A0837e371e',
   aiTranslateModel: 'Qwen/Qwen2.5-32B-Instruct',