feat(mediaserver): 飞牛影视增加访问码配置项

配置弹窗与初始化向导的飞牛表单增加访问码输入项，未开启时留空。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/components/dialog/MediaServerInfoDialog.vue

@@ -454,6 +454,17 @@ onMounted(() => {
                   prepend-inner-icon="mdi-lock"
                 />
               </VCol>
+              <VCol cols="12" md="6">
+                <VTextField
+                  type="password"
+                  v-model="mediaServerInfo.config.access_code"
+                  :label="t('mediaserver.accessCode')"
+                  :hint="t('mediaserver.accessCodeHint')"
+                  persistent-hint
+                  active
+                  prepend-inner-icon="mdi-shield-key"
+                />
+              </VCol>
               <VCol cols="12" md="6">
                 <VTextField
                   v-model.number="mediaServerInfo.sync_interval"

src/locales/en-US.ts

@@ -3809,6 +3809,9 @@ export default {
     usernameHint: 'Login username',
     password: 'Password',
     passwordHint: 'Login password',
+    accessCode: 'Access Code',
+    accessCodeHint:
+      'Access code enabled in fnOS Settings -> Security -> Access Settings. Leave empty if not enabled',
     syncLibraries: 'Sync Libraries',
     syncLibrariesHint: 'Only selected libraries will be synchronized',
     scanMode: 'Scan Mode',

src/locales/zh-CN.ts

@@ -3747,6 +3747,8 @@ export default {
     usernameHint: '登录用户名',
     password: '密码',
     passwordHint: '登录密码',
+    accessCode: '访问码',
+    accessCodeHint: '飞牛系统设置->安全性->访问设置中开启的访问码，未开启请留空',
     syncLibraries: '同步媒体库',
     syncLibrariesHint: '只有选中的媒体库才会被同步',
     scanMode: '扫描模式',

src/locales/zh-TW.ts

@@ -3749,6 +3749,8 @@ export default {
     usernameHint: '登錄用戶名',
     password: '密碼',
     passwordHint: '登錄密碼',
+    accessCode: '訪問碼',
+    accessCodeHint: '飛牛系統設定->安全性->訪問設定中開啟的訪問碼，未開啟請留空',
     syncLibraries: '同步媒體庫',
     syncLibrariesHint: '只有選中的媒體庫才會被同步',
     scanMode: '掃描模式',

src/views/setup/MediaServerSettingsStep.vue

@@ -492,6 +492,17 @@ watch(
                       required
                     />
                   </VCol>
+                  <VCol cols="12">
+                    <VTextField
+                      type="password"
+                      v-model="wizardData.mediaServer.config.access_code"
+                      :label="t('mediaserver.accessCode')"
+                      :hint="t('mediaserver.accessCodeHint')"
+                      persistent-hint
+                      active
+                      prepend-inner-icon="mdi-shield-key"
+                    />
+                  </VCol>
                   <VCol cols="12">
                     <VAutocomplete
                       v-model="wizardData.mediaServer.sync_libraries"