fix(#72): wait for API and retry SYB load

scripts/start-web.ps1

@@ -77,6 +77,32 @@ function Read-PortConfig {
     return @{ Server = [int]$values.server; Web = [int]$values.web }
 }
 
+function Wait-ApiReady {
+    param(
+        [int]$Port,
+        [int]$TimeoutSeconds = 60
+    )
+
+    $healthUrl = "http://127.0.0.1:${Port}/api/v1/health"
+    $stopwatch = [Diagnostics.Stopwatch]::StartNew()
+    Write-Host "Waiting for GoAuto API at $healthUrl ..." -ForegroundColor Cyan
+    while ($stopwatch.Elapsed.TotalSeconds -lt $TimeoutSeconds) {
+        try {
+            $response = Invoke-WebRequest -Uri $healthUrl -UseBasicParsing -TimeoutSec 2
+            if ($response.StatusCode -eq 200) {
+                Write-Host "GoAuto API is ready." -ForegroundColor Green
+                return
+            }
+        }
+        catch {
+            # The API process may still be migrating or compiling.
+        }
+        Start-Sleep -Milliseconds 1000
+    }
+
+    throw "GoAuto API did not become ready within ${TimeoutSeconds}s: $healthUrl"
+}
+
 if ([string]::IsNullOrWhiteSpace($ConfigPath)) {
     $ConfigPath = Join-Path $workspaceRoot "config.yaml"
 }
@@ -94,6 +120,8 @@ if ($ValidateConfigOnly) {
     return
 }
 
+Wait-ApiReady -Port $ports.Server
+
 $node = Get-Command node.exe -ErrorAction SilentlyContinue
 if ($node) {
     $nodePath = $node.Source