fix(*): 模型目录 - 修复前台开关、系统模型价格与访问控制

backend/internal/handler/model_catalog.go

@@ -0,0 +1,80 @@
+package handler
+
+import (
+	"errors"
+	"net/http"
+
+	"infinite-canvas/backend/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// RegisterModelCatalogRoutes 注册统一模型目录路由
+func RegisterModelCatalogRoutes(r *gin.RouterGroup, svc *service.Service) {
+	r.GET("/model-catalog", func(c *gin.Context) {
+		if _, err := currentUser(c, svc); err != nil {
+			failService(c, err)
+			return
+		}
+		catalog, err := svc.ModelCatalog(nil)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		ok(c, catalog)
+	})
+
+	r.POST("/model-catalog/available", func(c *gin.Context) {
+		if _, err := currentUser(c, svc); err != nil {
+			failService(c, err)
+			return
+		}
+		var intent service.ModelRequestIntent
+		if err := c.ShouldBindJSON(&intent); err != nil {
+			fail(c, http.StatusBadRequest, errors.New("模型能力请求格式错误"))
+			return
+		}
+		catalog, err := svc.ModelCatalog(&intent)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+		ok(c, catalog)
+	})
+
+	r.POST("/model-catalog/quote", func(c *gin.Context) {
+		if _, err := currentUser(c, svc); err != nil {
+			failService(c, err)
+			return
+		}
+		var req struct {
+			ModelID string                     `json:"modelId"`
+			Intent  service.ModelRequestIntent `json:"intent"`
+		}
+		if err := c.ShouldBindJSON(&req); err != nil {
+			fail(c, http.StatusBadRequest, errors.New("模型报价请求格式错误"))
+			return
+		}
+
+		// 根据 frontendModelsEnabled 决定使用哪种报价方式
+		frontendEnabled, err := svc.FeatureEnabled(service.FeatureFrontendModels)
+		if err != nil {
+			failService(c, err)
+			return
+		}
+
+		if frontendEnabled {
+			// 使用前台模型报价
+			quote, err := svc.QuoteLogicalModel(req.ModelID, req.Intent)
+			if err != nil {
+				failService(c, err)
+				return
+			}
+			ok(c, gin.H{"quote": quote})
+		} else {
+			// 使用系统渠道模型报价
+			// TODO: 实现系统渠道模型报价逻辑
+			fail(c, http.StatusNotImplemented, errors.New("系统渠道模型报价功能尚未实现"))
+		}
+	})
+}