fix(*): MiniMax 视频能力 - 放行参考素材视频生成并统一操作推导

backend/internal/service/model_capability.go

@@ -229,6 +229,7 @@ func DefaultModelCapabilityConfigForModel(protocol string, modelName string) *Mo
 		video.Resolutions = []string{"1080p"}
 		video.DefaultResolution = "1080p"
 	case model.ChannelInterfaceMiniMaxVideo:
+		video.Operations = append(video.Operations, "reference_to_video")
 		video.References.MaxImages = 9
 		video.References.MaxImageBytes = 30 * 1024 * 1024
 		video.References.MaxVideos = 3

backend/internal/service/model_capability_test.go

@@ -83,6 +83,16 @@ func TestDefaultVideoCapabilityUsesProtocolSpecificResolutionTiers(t *testing.T)
 	}
 }
 
+func TestDefaultMiniMaxVideoCapabilitySupportsReferenceGeneration(t *testing.T) {
+	profile := DefaultModelCapabilityConfigForModel("minimax-video", "MiniMax-H3")
+	if profile == nil || profile.Video == nil {
+		t.Fatal("MiniMax video profile = nil")
+	}
+	if !containsCapabilityString(profile.Video.Operations, "reference_to_video") {
+		t.Fatalf("operations = %v, want reference_to_video", profile.Video.Operations)
+	}
+}
+
 func TestCapabilitySpecFromModelCapabilityConfigRestoresLegacyWildcardImageSizes(t *testing.T) {
 	config := &ModelCapabilityConfig{
 		Version: 1,