fix(claude-code): 额度查询携带 x-app/claude-cli UA 以获取 cedar_ember，并在无重置机会时显式清空

crates/aether-provider/pool/src/providers/claude_code.rs

@@ -11,7 +11,7 @@ use crate::quota_refresh::ProviderPoolQuotaRequestSpec;
 pub const CLAUDE_CODE_OAUTH_USAGE_URL: &str =
     "https://api.anthropic.com/api/oauth/usage?cedar_ember=1&skip_spend=1";
 pub const CLAUDE_CODE_OAUTH_BETA: &str = "oauth-2025-04-20";
-pub const CLAUDE_CODE_USAGE_USER_AGENT: &str = "claude-code/2.1.284";
+pub const CLAUDE_CODE_USAGE_USER_AGENT: &str = "claude-cli/2.1.284 (external, cli)";
 
 #[derive(Debug, Clone, Default)]
 pub struct ClaudeCodeProviderPoolAdapter;
@@ -58,6 +58,8 @@ pub fn build_claude_code_pool_quota_request(
             "anthropic-beta".to_string(),
             CLAUDE_CODE_OAUTH_BETA.to_string(),
         ),
+        // The reset-credit (`cedar_ember`) block is only returned to first-party CLI callers.
+        ("x-app".to_string(), "cli".to_string()),
         (
             "user-agent".to_string(),
             CLAUDE_CODE_USAGE_USER_AGENT.to_string(),