feat: 添加 HTTP 处理层和结构化日志

- JobHandler: 提交/查询/取消/历史，5xx Error + 4xx Warn 日志

- ClusterHandler: 节点/分区/诊断，错误和未找到日志

- TemplateHandler: CRUD 操作，创建/更新/删除 Info + 未找到 Warn

- 不记录成功响应（由 middleware.RequestLogger 处理）

- 不记录请求体和模板内容（安全考虑）

- 完整 TDD 测试，使用 zaptest/observer 验证日志级别和字段

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/handler/template.go

@@ -0,0 +1,139 @@
+package handler
+
+import (
+	"strconv"
+
+	"gcy_hpc_server/internal/model"
+	"gcy_hpc_server/internal/server"
+	"gcy_hpc_server/internal/store"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+)
+
+type TemplateHandler struct {
+	store  *store.TemplateStore
+	logger *zap.Logger
+}
+
+func NewTemplateHandler(s *store.TemplateStore, logger *zap.Logger) *TemplateHandler {
+	return &TemplateHandler{store: s, logger: logger}
+}
+
+func (h *TemplateHandler) ListTemplates(c *gin.Context) {
+	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))
+
+	if page < 1 {
+		page = 1
+	}
+	if pageSize < 1 {
+		pageSize = 20
+	}
+
+	templates, total, err := h.store.List(c.Request.Context(), page, pageSize)
+	if err != nil {
+		h.logger.Error("failed to list templates", zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	server.OK(c, gin.H{
+		"templates": templates,
+		"total":     total,
+		"page":      page,
+		"page_size": pageSize,
+	})
+}
+
+func (h *TemplateHandler) CreateTemplate(c *gin.Context) {
+	var req model.CreateTemplateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		h.logger.Warn("invalid request body for create template", zap.Error(err))
+		server.BadRequest(c, "invalid request body")
+		return
+	}
+
+	if req.Name == "" || req.Script == "" {
+		h.logger.Warn("missing required fields for create template")
+		server.BadRequest(c, "name and script are required")
+		return
+	}
+
+	id, err := h.store.Create(c.Request.Context(), &req)
+	if err != nil {
+		h.logger.Error("failed to create template", zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	h.logger.Info("template created", zap.Int64("id", id))
+	server.Created(c, gin.H{"id": id})
+}
+
+func (h *TemplateHandler) GetTemplate(c *gin.Context) {
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		h.logger.Warn("invalid template id", zap.String("id", c.Param("id")))
+		server.BadRequest(c, "invalid id")
+		return
+	}
+
+	tmpl, err := h.store.GetByID(c.Request.Context(), id)
+	if err != nil {
+		h.logger.Error("failed to get template", zap.Int64("id", id), zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	if tmpl == nil {
+		h.logger.Warn("template not found", zap.Int64("id", id))
+		server.NotFound(c, "template not found")
+		return
+	}
+
+	server.OK(c, tmpl)
+}
+
+func (h *TemplateHandler) UpdateTemplate(c *gin.Context) {
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		h.logger.Warn("invalid template id for update", zap.String("id", c.Param("id")))
+		server.BadRequest(c, "invalid id")
+		return
+	}
+
+	var req model.UpdateTemplateRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		h.logger.Warn("invalid request body for update template", zap.Int64("id", id), zap.Error(err))
+		server.BadRequest(c, "invalid request body")
+		return
+	}
+
+	if err := h.store.Update(c.Request.Context(), id, &req); err != nil {
+		h.logger.Error("failed to update template", zap.Int64("id", id), zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	h.logger.Info("template updated", zap.Int64("id", id))
+	server.OK(c, gin.H{"message": "template updated"})
+}
+
+func (h *TemplateHandler) DeleteTemplate(c *gin.Context) {
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		h.logger.Warn("invalid template id for delete", zap.String("id", c.Param("id")))
+		server.BadRequest(c, "invalid id")
+		return
+	}
+
+	if err := h.store.Delete(c.Request.Context(), id); err != nil {
+		h.logger.Error("failed to delete template", zap.Int64("id", id), zap.Error(err))
+		server.InternalError(c, err.Error())
+		return
+	}
+
+	h.logger.Info("template deleted", zap.Int64("id", id))
+	server.OK(c, gin.H{"message": "template deleted"})
+}