fix(core): volcengine 配置判定不再要求 resource id——运行时留空会回落默认资源

听写运行时对空 resource id 回落 volc.seedasr.sauc.duration（resolve_resource_id），
但 volcengine_configured 把它当硬门槛：合法的「密钥齐全、资源 id 留空」配置被误报
「语音识别未配置」并每次启动弹配置提示。认证是否就绪只取决于密钥本身。

openless-all/app/crates/openless-core/src/provider_rules.rs

@@ -334,7 +334,9 @@ pub struct CredentialConfiguration {
 pub fn volcengine_configured(configuration: &CredentialConfiguration) -> bool {
     use crate::asr::volcengine::VolcengineAuthMode;
 
-    let credentials_ready = match configuration
+    // resource id 不是配置门槛：留空时运行时回落默认资源
+    //（见 VolcengineCredentials::resolve_resource_id），认证只取决于密钥本身。
+    match configuration
         .volcengine_auth_mode
         .as_deref()
         .map(VolcengineAuthMode::parse)
@@ -344,8 +346,7 @@ pub fn volcengine_configured(configuration: &CredentialConfiguration) -> bool {
             configuration.volcengine_app_key && configuration.volcengine_access_key
         }
         VolcengineAuthMode::ApiKey => configuration.volcengine_api_key,
-    };
-    credentials_ready && configuration.volcengine_resource_id
+    }
 }
 
 pub fn asr_configured(
@@ -962,6 +963,9 @@ mod tests {
         configuration.volcengine_api_key = true;
         configuration.volcengine_resource_id = true;
         assert!(volcengine_configured(&configuration));
+        // resource id 留空（运行时回落默认资源）不构成「未配置」。
+        configuration.volcengine_resource_id = false;
+        assert!(volcengine_configured(&configuration));
         assert!(!asr_configured(
             "foundry-local-whisper",
             &configuration,