CUB-127: implement Control Center CRUD API in Go

go-backend/internal/handler/session.go

@@ -0,0 +1,28 @@
+package handler
+
+import (
+	"net/http"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+)
+
+// ─── Session Handlers ──────────────────────────────────────────────────────────
+
+// ListSessions handles GET /api/sessions.
+func (h *Handler) ListSessions(w http.ResponseWriter, r *http.Request) {
+	sessions := h.SessionStore.ListActive()
+	if sessions == nil {
+		sessions = []models.Session{}
+	}
+
+	page, pageSize := parsePagination(r)
+	start, end := paginateSlice(len(sessions), page, pageSize)
+
+	writeJSON(w, http.StatusOK, models.PaginatedResponse{
+		Data:       sessions[start:end],
+		TotalCount: h.SessionStore.Count(),
+		Page:       page,
+		PageSize:   pageSize,
+		HasMore:    end < len(sessions),
+	})
+}