feat(handler): 体检 HTTP 查询端点（T-302）

- GET /api/health-check/last（最近一次）+ /api/health-check/list（年度已检未检名单）
- 回写平台完整响应 Result.Raw，抽 writeRawOrError 共用
- last 按 idCard/phrid/empiId；list 按 checkYear(必填)+idCard+checkType
- 单测：路径/原样回写/缺参 400（脱敏假 OSI 后端）；默认仅绑本机

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

handler/health_check.go

@@ -0,0 +1,74 @@
+package handler
+
+import (
+	"net/http"
+
+	"chis_osi/osi"
+)
+
+// HealthCheckHandler 暴露健康体检查询的 HTTP 入口。
+type HealthCheckHandler struct {
+	client *osi.Client
+}
+
+func NewHealthCheckHandler(client *osi.Client) *HealthCheckHandler {
+	return &HealthCheckHandler{client: client}
+}
+
+// Last 处理 GET /api/health-check/last?idCard=..|phrid=..|empiId=..
+// 返回某人最近一次体检的平台完整响应（含全部子节点，见 docs/04 §11）。
+func (h *HealthCheckHandler) Last(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
+		return
+	}
+	q := r.URL.Query()
+	query := osi.FindHealthCheckQuery{
+		IDCard: q.Get("idCard"),
+		PHRID:  q.Get("phrid"),
+		EMPIID: q.Get("empiId"),
+	}
+	if query.IDCard == "" && query.PHRID == "" && query.EMPIID == "" {
+		writeJSONError(w, http.StatusBadRequest, "provide one of: idCard, phrid, empiId")
+		return
+	}
+	_, result, err := h.client.LastHealthCheck(r.Context(), query)
+	writeRawOrError(w, result, err)
+}
+
+// List 处理 GET /api/health-check/list?checkYear=..&idCard=..&checkType=..&page=..&rows=..
+// 返回某年度已检/未检人员名单的平台完整响应（名单，非体检明细，见 docs/04 §11.4）。
+func (h *HealthCheckHandler) List(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		writeJSONError(w, http.StatusMethodNotAllowed, "only GET is supported")
+		return
+	}
+	q := r.URL.Query()
+	if q.Get("checkYear") == "" {
+		writeJSONError(w, http.StatusBadRequest, "checkYear is required")
+		return
+	}
+	query := osi.ListHealthCheckQuery{
+		CheckYear: q.Get("checkYear"),
+		IDCard:    q.Get("idCard"),
+		CheckType: q.Get("checkType"),
+		Page:      q.Get("page"),
+		Rows:      q.Get("rows"),
+	}
+	_, result, err := h.client.ListHealthCheckPeople(r.Context(), query)
+	writeRawOrError(w, result, err)
+}
+
+// writeRawOrError 拿到平台响应就原样回写完整 JSON，否则按错误返回。
+func writeRawOrError(w http.ResponseWriter, result osi.Result, err error) {
+	if len(result.Raw) > 0 {
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+		_, _ = w.Write(result.Raw)
+		return
+	}
+	if err != nil {
+		writeJSONError(w, http.StatusBadGateway, err.Error())
+		return
+	}
+	writeJSONError(w, http.StatusBadGateway, "empty response from OSI")
+}