Add backend foundation and config-driven workbench

backend/internal/httpapi/handlers/home_handler.go

@@ -0,0 +1,53 @@
+package handlers
+
+import (
+	"net/http"
+	"strconv"
+
+	"cmr-backend/internal/httpx"
+	"cmr-backend/internal/service"
+)
+
+type HomeHandler struct {
+	homeService *service.HomeService
+}
+
+func NewHomeHandler(homeService *service.HomeService) *HomeHandler {
+	return &HomeHandler{homeService: homeService}
+}
+
+func (h *HomeHandler) GetHome(w http.ResponseWriter, r *http.Request) {
+	result, err := h.homeService.GetHome(r.Context(), buildListCardsInput(r))
+	if err != nil {
+		httpx.WriteError(w, err)
+		return
+	}
+	httpx.WriteJSON(w, http.StatusOK, map[string]any{"data": result})
+}
+
+func (h *HomeHandler) GetCards(w http.ResponseWriter, r *http.Request) {
+	result, err := h.homeService.ListCards(r.Context(), buildListCardsInput(r))
+	if err != nil {
+		httpx.WriteError(w, err)
+		return
+	}
+	httpx.WriteJSON(w, http.StatusOK, map[string]any{"data": result})
+}
+
+func buildListCardsInput(r *http.Request) service.ListCardsInput {
+	limit := 20
+	if raw := r.URL.Query().Get("limit"); raw != "" {
+		if parsed, err := strconv.Atoi(raw); err == nil {
+			limit = parsed
+		}
+	}
+
+	return service.ListCardsInput{
+		ChannelCode:   r.URL.Query().Get("channelCode"),
+		ChannelType:   r.URL.Query().Get("channelType"),
+		PlatformAppID: r.URL.Query().Get("platformAppId"),
+		TenantCode:    r.URL.Query().Get("tenantCode"),
+		Slot:          r.URL.Query().Get("slot"),
+		Limit:         limit,
+	}
+}