feat: add dashboard handlers for roles, sessions, skill definitions, tags, tickets, users, and WeChat integration

- Implement role management endpoints including listing, creating, updating, and deleting roles.
- Add session management endpoints for viewing and revoking sessions.
- Create skill definition management endpoints for CRUD operations and status updates.
- Introduce tag management endpoints for handling tags with sorting and status updates.
- Develop ticket management endpoints for viewing, creating, updating, and managing ticket progress.
- Implement user management endpoints for CRUD operations, role assignments, and password resets.
- Add WeChat callback handlers for verifying and processing messages.

internal/handlers/dashboard/dashboard_handler.go

@@ -0,0 +1,15 @@
+package dashboard
+
+import (
+	"cs-agent/internal/pkg/httpx"
+	"cs-agent/internal/services"
+
+	"cs-agent/internal/pkg/httpx/params"
+
+	"github.com/gin-gonic/gin"
+)
+
+func DashboardGetOverview(ctx *gin.Context) {
+	rangeValue, _ := params.Get(ctx, "range")
+	httpx.WriteJSON(ctx, services.DashboardService.GetOverview(rangeValue))
+}