always require upstream url

src/lib/aiProviderDefaults.ts

@@ -85,13 +85,8 @@ export function providerRequiresUpstreamUrl(
     type: AiProviderType,
     routingMode: AiProviderRoutingMode = "url"
 ): boolean {
-    if (routingMode === "target") {
-        return false;
-    }
-    if (type === "custom") {
-        return true;
-    }
-    return AI_PROVIDER_DEFAULTS[type].upstreamUrl === null;
+    const mode = type === "custom" ? routingMode : "url";
+    return mode !== "target";
 }
 
 export function defaultsForProviderType(

src/lib/aiProviderFormSchema.ts

@@ -148,17 +148,6 @@ export function emptyUpstreamForType(type: AiProviderType): string {
 export function showsUpstreamUrlField(
     type: AiProviderType,
     routingMode: "url" | "target" | undefined
-): boolean {
-    const mode = type === "custom" ? (routingMode ?? "url") : "url";
-    if (mode === "target") {
-        return false;
-    }
-    return true;
-}
-
-export function upstreamUrlRequired(
-    type: AiProviderType,
-    routingMode: "url" | "target" | undefined
 ): boolean {
     const mode = type === "custom" ? (routingMode ?? "url") : "url";
     return providerRequiresUpstreamUrl(type, mode);