diff --git a/web/static/js/settings-eino-resilience.test.cjs b/web/static/js/settings-eino-resilience.test.cjs
index 26a6bb94..38bb7ec0 100644
--- a/web/static/js/settings-eino-resilience.test.cjs
+++ b/web/static/js/settings-eino-resilience.test.cjs
@@ -60,3 +60,9 @@ test('AI 通道保存前会自动识别 DeepSeek 官方线路', () => {
     assert.match(settings, /normalizeAIConfigProviderProfiles\(currentConfig\.ai\)/);
     assert.match(template, /<option value="deepseek">deepseek<\/option>/);
 });
+
+test('切换或新增 AI 通道时会刷新推理线路下拉显示', () => {
+    assert.match(settings, /const profileEl = document\.getElementById\('openai-reasoning-profile'\);/);
+    assert.match(settings, /syncSettingsCustomSelect\(profileEl\);/);
+    assert.match(settings, /reasoning:\s*\{\s*mode:\s*'auto',\s*effort:\s*'',\s*profile:\s*'auto'/);
+});
diff --git a/web/static/js/settings.js b/web/static/js/settings.js
index 44229c41..c30d1e87 100644
--- a/web/static/js/settings.js
+++ b/web/static/js/settings.js
@@ -2632,6 +2632,7 @@ function writeAIChannelToMainForm(id) {
     if (providerEl) {
         const provider = (ch.provider === 'openai' || !ch.provider) ? 'openai_compatible' : ch.provider;
         providerEl.value = provider;
+        syncSettingsCustomSelect(providerEl);
     }
     const keyEl = document.getElementById('openai-api-key');
     if (keyEl) keyEl.value = ch.api_key || '';
@@ -2645,11 +2646,20 @@ function writeAIChannelToMainForm(id) {
     if (maxCompletionTokensEl) maxCompletionTokensEl.value = ch.max_completion_tokens || 32768;
     const r = ch.reasoning || {};
     const modeEl = document.getElementById('openai-reasoning-mode');
-    if (modeEl) modeEl.value = ['auto', 'on', 'off'].includes(String(r.mode || '').toLowerCase()) ? String(r.mode).toLowerCase() : 'auto';
+    if (modeEl) {
+        modeEl.value = ['auto', 'on', 'off'].includes(String(r.mode || '').toLowerCase()) ? String(r.mode).toLowerCase() : 'auto';
+        syncSettingsCustomSelect(modeEl);
+    }
     const effEl = document.getElementById('openai-reasoning-effort');
-    if (effEl) effEl.value = ['', 'low', 'medium', 'high', 'max', 'xhigh'].includes(String(r.effort || '').toLowerCase()) ? String(r.effort || '').toLowerCase() : '';
+    if (effEl) {
+        effEl.value = ['', 'low', 'medium', 'high', 'max', 'xhigh'].includes(String(r.effort || '').toLowerCase()) ? String(r.effort || '').toLowerCase() : '';
+        syncSettingsCustomSelect(effEl);
+    }
     const profileEl = document.getElementById('openai-reasoning-profile');
-    if (profileEl) profileEl.value = ['auto', 'deepseek', 'deepseek_compat', 'openai_compat', 'output_config_effort'].includes(String(r.profile || '').toLowerCase()) ? String(r.profile || '').toLowerCase() : 'auto';
+    if (profileEl) {
+        profileEl.value = ['auto', 'deepseek', 'deepseek_compat', 'openai_compat', 'output_config_effort'].includes(String(r.profile || '').toLowerCase()) ? String(r.profile || '').toLowerCase() : 'auto';
+        syncSettingsCustomSelect(profileEl);
+    }
     const allowEl = document.getElementById('openai-reasoning-allow-client');
     if (allowEl) allowEl.checked = r.allow_client_reasoning !== false;
     syncModelListFetchButtons();