refactor(plugins): restructure admin and message_gateway into standard layered sub-packages

backend/plugins/domain/admin/handler/cache.go

@@ -0,0 +1,76 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package handler
+
+import (
+	"Wavelet/pkg/response"
+	"Wavelet/plugins/domain/admin/model"
+	"Wavelet/plugins/domain/admin/service"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// GetCacheStatus 获取磁盘缓存状态与当前统计数据
+// @Summary 获取缓存状态
+// @Description 获取当前系统磁盘缓存的使用情况（已占用字节、Key 数量等）与策略配置
+// @Tags admin
+// @Produce json
+// @Security SessionCookie
+// @Success 200 {object} response.Any{data=disk.Status} "获取成功"
+// @Failure 401 {object} response.Any "未登录"
+// @Failure 403 {object} response.Any "无管理员权限"
+// @Failure 500 {object} response.Any "内部错误"
+// @Router /api/v1/admin/cache/status [get]
+func GetCacheStatus(c *gin.Context) {
+	c.JSON(http.StatusOK, response.OK(service.DiskCacheStatus()))
+}
+
+// UpdateCacheConfig 更新磁盘缓存策略配置
+// @Summary 更新缓存配置
+// @Description 更改磁盘缓存最大容量限制、文件生存时间（TTL）以及是否启用 LRU 淘汰淘汰算法，并进行热更新
+// @Tags admin
+// @Accept json
+// @Produce json
+// @Param request body model.UpdateCacheConfigRequest true "缓存配置请求体"
+// @Security SessionCookie
+// @Success 200 {object} response.Any "更新成功"
+// @Failure 400 {object} response.Any "参数错误"
+// @Failure 401 {object} response.Any "未登录"
+// @Failure 403 {object} response.Any "无管理员权限"
+// @Failure 500 {object} response.Any "服务内部错误"
+// @Router /api/v1/admin/cache/config [post]
+func UpdateCacheConfig(c *gin.Context) {
+	var req model.UpdateCacheConfigRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.AbortBadRequest(c, err.Error())
+		return
+	}
+
+	if err := service.UpdateDiskCachePolicy(c.Request.Context(), req); err != nil {
+		response.AbortInternal(c, err.Error())
+		return
+	}
+
+	c.JSON(http.StatusOK, response.OKNil())
+}
+
+// ClearCache 一键清空所有磁盘缓存数据
+// @Summary 清空缓存
+// @Description 清除系统磁盘缓存目录中的所有临时文件，并重置缓存容量和 Key 追踪数据
+// @Tags admin
+// @Produce json
+// @Security SessionCookie
+// @Success 200 {object} response.Any "清理成功"
+// @Failure 401 {object} response.Any "未登录"
+// @Failure 403 {object} response.Any "无管理员权限"
+// @Failure 500 {object} response.Any "服务内部错误"
+// @Router /api/v1/admin/cache/clear [post]
+func ClearCache(c *gin.Context) {
+	if err := service.ClearDiskCache(); err != nil {
+		response.AbortInternal(c, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, response.OKNil())
+}