feat(providers): add qoder-cn support for Qoder CN (qoder.com.cn)

open-sse/providers/capabilities.js

@@ -255,6 +255,10 @@ export const PROVIDER_CAPABILITIES = {
   },
 };
 
+// Qoder CN serves the identical model catalog from the CN gateway, so it shares
+// the intl Qoder capability table verbatim (vision/reasoning/contextWindow).
+PROVIDER_CAPABILITIES["qoder-cn"] = PROVIDER_CAPABILITIES["qoder"];
+
 /**
  * Pattern fallback — glob (* = wildcard), matched case-insensitively and
  * anchored (^...$) so a pattern must match the full model id. ORDER MATTERS: