diff --git a/apps/web_v1/scripts/visual-check.mjs b/apps/web_v1/scripts/visual-check.mjs
index d44da0c..9fa0160 100644
--- a/apps/web_v1/scripts/visual-check.mjs
+++ b/apps/web_v1/scripts/visual-check.mjs
@@ -280,6 +280,9 @@ const collectMetrics = async () => page.evaluate(() => {
 })
 
 await page.goto(`http://127.0.0.1:${port}/`, { waitUntil: 'networkidle' })
+await page.locator('.login-form input').first().fill('localhost:9150')
+await page.waitForSelector('.connection-card.online')
+const loginConnectionStatus = await page.locator('.connection-card').textContent()
 await page.screenshot({ path: 'test-results/login-react-acro.png', fullPage: true })
 await page.locator('.login-form-panel .arco-btn-primary').click()
 await page.waitForSelector('.workbench-shell')
@@ -415,6 +418,7 @@ console.log(JSON.stringify({
 
 const failures = []
 const metrics = workspaceMetrics
+if (!loginConnectionStatus?.includes('连接正常')) failures.push(`scheme-less server address must connect, got ${JSON.stringify(loginConnectionStatus)}`)
 if (errors.length) failures.push(`console errors: ${errors.join('; ')}`)
 if (metrics.statusbarHeight !== 32) failures.push(`expected statusbar height 32, got ${metrics.statusbarHeight}`)
 if (!metrics.statusName) failures.push('expected authenticated status label')
diff --git a/apps/web_v1/src/api/client.ts b/apps/web_v1/src/api/client.ts
index 5ff99b4..deccf24 100644
--- a/apps/web_v1/src/api/client.ts
+++ b/apps/web_v1/src/api/client.ts
@@ -136,6 +136,7 @@ function fallbackErrorMessage(status: number) {
 }
 
 export function normalizeBaseUrl(value: string) {
-  const trimmed = value.trim()
-  return trimmed.replace(/\/+$/, '')
+  const normalized = value.trim().replace(/\/+$/, '')
+  if (!normalized || /^https?:\/\//i.test(normalized)) return normalized
+  return `http://${normalized}`
 }