fix(provider): add reviewer-requested fixes for Alibaba Coding Plan

- Add qwen-international, dashscope-intl, dashscope-us aliases to switch case
- Add coding-plan-anthropic case with anthropicmessages.NewProviderWithTimeout
- Add alibaba-coding-anthropic -> coding-plan-anthropic normalization
- Add qwen-international -> qwen-intl and dashscope-us -> qwen-us normalization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

pkg/providers/factory_provider.go

@@ -115,8 +115,8 @@ func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, err
 
 	case "litellm", "openrouter", "groq", "zhipu", "gemini", "nvidia",
 		"ollama", "moonshot", "shengsuanyun", "deepseek", "cerebras",
-		"vivgrid", "volcengine", "vllm", "qwen", "qwen-intl", "qwen-us",
+		"vivgrid", "volcengine", "vllm", "qwen", "qwen-intl", "qwen-international", "dashscope-intl",
-		"mistral", "avian", "minimax", "longcat", "modelscope", "novita",
+		"qwen-us", "dashscope-us", "mistral", "avian", "minimax", "longcat", "modelscope", "novita",
 		"coding-plan", "alibaba-coding", "qwen-coding":
 		// All other OpenAI-compatible HTTP providers
 		if cfg.APIKey == "" && cfg.APIBase == "" {
@@ -174,6 +174,21 @@ func CreateProviderFromConfig(cfg *config.ModelConfig) (LLMProvider, string, err
 			cfg.RequestTimeout,
 		), modelID, nil
 
+	case "coding-plan-anthropic", "alibaba-coding-anthropic":
+		// Alibaba Coding Plan with Anthropic-compatible API
+		apiBase := cfg.APIBase
+		if apiBase == "" {
+			apiBase = getDefaultAPIBase(protocol)
+		}
+		if cfg.APIKey == "" {
+			return nil, "", fmt.Errorf("api_key is required for %q protocol (model: %s)", protocol, cfg.Model)
+		}
+		return anthropicmessages.NewProviderWithTimeout(
+			cfg.APIKey,
+			apiBase,
+			cfg.RequestTimeout,
+		), modelID, nil
+
 	case "antigravity":
 		return NewAntigravityProvider(), modelID, nil
 

pkg/providers/model_ref.go

@@ -55,6 +55,12 @@ func NormalizeProvider(provider string) string {
 		return "gemini"
 	case "alibaba-coding", "qwen-coding":
 		return "coding-plan"
+	case "alibaba-coding-anthropic":
+		return "coding-plan-anthropic"
+	case "qwen-international", "dashscope-intl":
+		return "qwen-intl"
+	case "dashscope-us":
+		return "qwen-us"
 	}
 
 	return p