LLM支持优化

src/utils/keyring.rs

@@ -85,11 +85,10 @@ impl KeyringManager {
     }
 
     pub fn get_api_key(&self, provider: &str) -> Result<Option<String>> {
-        if let Ok(key) = env::var(ENV_API_KEY) {
-            if !key.is_empty() {
+        if let Ok(key) = env::var(ENV_API_KEY)
+            && !key.is_empty() {
                 return Ok(Some(key));
             }
-        }
 
         if !self.is_available() {
             return Ok(None);
@@ -251,8 +250,8 @@ pub fn get_default_model(provider: &str) -> &'static str {
     match provider {
         "openai" => "gpt-4",
         "anthropic" => "claude-3-sonnet-20240229",
-        "kimi" => "moonshot-v1-8k",
-        "deepseek" => "deepseek-chat",
+        "kimi" => "kimi-k2.6",
+        "deepseek" => "deepseek-v4-flash",
         "openrouter" => "openai/gpt-3.5-turbo",
         "ollama" => "llama2",
         _ => "",