feat: 候选排序引入 API 格式偏好, 追踪页面展示完整格式转换信息

- 候选排序优先同 kind (chat/cli) 再同 family, 替代原有固定顺序
- 不再隐藏 format_conversion_disabled 候选, 保留完整追踪链路
- DecisionTrace 新增 provider/endpoint/key 格式转换相关字段
- 前端追踪面板新增 Key 支持端点和转换策略展示

apps/aether-gateway/src/handlers/admin/observability/monitoring/tests/trace.rs

@@ -76,9 +76,9 @@ async fn admin_monitoring_trace_request_returns_local_payload() {
 }
 
 #[tokio::test]
-async fn admin_monitoring_trace_request_hides_format_conversion_disabled_candidates() {
-    let mut hidden_candidate = sample_candidate(
-        "cand-hidden",
+async fn admin_monitoring_trace_request_keeps_format_conversion_disabled_candidates_visible() {
+    let mut format_disabled_candidate = sample_candidate(
+        "cand-format-disabled",
         "request-1",
         0,
         RequestCandidateStatus::Skipped,
@@ -86,7 +86,7 @@ async fn admin_monitoring_trace_request_hides_format_conversion_disabled_candida
         None,
         None,
     );
-    hidden_candidate.skip_reason = Some("format_conversion_disabled".to_string());
+    format_disabled_candidate.skip_reason = Some("format_conversion_disabled".to_string());
 
     let mut visible_skipped_candidate = sample_candidate(
         "cand-visible-skipped",
@@ -100,7 +100,7 @@ async fn admin_monitoring_trace_request_hides_format_conversion_disabled_candida
     visible_skipped_candidate.skip_reason = Some("transport_unsupported".to_string());
 
     let request_candidates = Arc::new(InMemoryRequestCandidateRepository::seed(vec![
-        hidden_candidate,
+        format_disabled_candidate,
         visible_skipped_candidate,
         sample_candidate(
             "cand-used",
@@ -136,7 +136,7 @@ async fn admin_monitoring_trace_request_hides_format_conversion_disabled_candida
         .expect("body should read");
     let payload: serde_json::Value = serde_json::from_slice(&body).expect("json body should parse");
 
-    assert_eq!(payload["total_candidates"], json!(2));
+    assert_eq!(payload["total_candidates"], json!(3));
     assert_eq!(
         payload["candidates"]
             .as_array()
@@ -144,10 +144,14 @@ async fn admin_monitoring_trace_request_hides_format_conversion_disabled_candida
             .iter()
             .map(|item| item["id"].as_str().unwrap_or_default())
             .collect::<Vec<_>>(),
-        vec!["cand-visible-skipped", "cand-used"]
+        vec!["cand-format-disabled", "cand-visible-skipped", "cand-used"]
     );
     assert_eq!(
         payload["candidates"][0]["skip_reason"],
+        json!("format_conversion_disabled")
+    );
+    assert_eq!(
+        payload["candidates"][1]["skip_reason"],
         json!("transport_unsupported")
     );
 }

apps/aether-gateway/src/handlers/admin/observability/monitoring/trace.rs

@@ -15,22 +15,6 @@ use axum::{
 };
 use tracing::debug;
 
-const HIDDEN_TRACE_SKIP_REASONS: &[&str] = &["format_conversion_disabled"];
-
-fn filter_admin_monitoring_trace_candidates(mut trace: DecisionTrace) -> DecisionTrace {
-    trace.candidates.retain(|item| {
-        let skip_reason = item
-            .candidate
-            .skip_reason
-            .as_deref()
-            .map(str::trim)
-            .filter(|value| !value.is_empty());
-        !skip_reason.is_some_and(|reason| HIDDEN_TRACE_SKIP_REASONS.contains(&reason))
-    });
-    trace.total_candidates = trace.candidates.len();
-    trace
-}
-
 pub(super) async fn build_admin_monitoring_trace_request_response(
     state: &AdminAppState<'_>,
     request_context: &AdminRequestContext<'_>,
@@ -67,7 +51,6 @@ pub(super) async fn build_admin_monitoring_trace_request_response(
             attempted_only,
         ));
     };
-    let trace = filter_admin_monitoring_trace_candidates(trace);
 
     Ok(build_admin_monitoring_trace_request_payload_response(
         &trace,