feat(canvas): 生成合同 - 统一节点参数并补充模型上下文能力

web/src/lib/canvas/canvas-project-generation.ts

@@ -17,6 +17,7 @@ import type { CanvasNodeGenerationMode } from "@/components/canvas/canvas-node-p
 import { CanvasNodeType, type CanvasAssistantSession, type CanvasConnection, type CanvasImageGenerationType, type CanvasNodeData, type CanvasNodeMetadata, type CanvasVideoEditOperation } from "@/types/canvas";
 import type { ReferenceImage } from "@/types/image";
 import type { ReferenceAudio, ReferenceVideo } from "@/types/media";
+import { generationSpecMetadata, readNodeGenerationSpec, resolveGenerationSelection } from "@/lib/canvas/generation-contract";
 
 export async function runBackendCanvasGenerationTask(
     {
@@ -416,12 +417,18 @@ export function generationWorkflowMetadata(config: AiConfig): Pick<CanvasNodeMet
     };
 }
 
-export function buildGenerationConfig(config: AiConfig, node: CanvasNodeData | undefined, mode: CanvasNodeGenerationMode, requirements?: ModelRequirements): AiConfig {
+export function buildGenerationConfig(config: AiConfig, node: CanvasNodeData | undefined, mode: CanvasNodeGenerationMode, requirements?: ModelRequirements, displayOnly = false): AiConfig {
+    const generationSpec = node ? readNodeGenerationSpec(node) : undefined;
+    const selection = generationSpec?.mode === mode ? generationSpec.modelSelection : undefined;
+    const selectedModel = resolveGenerationSelection(config, selection);
+    if (selection && !selectedModel && !displayOnly) throw new Error("节点选择的模型或渠道已不可用，请重新选择模型后生成");
+    if (node && generationSpec?.mode === mode) node = { ...node, metadata: { ...node.metadata, ...generationSpecMetadata(generationSpec) } };
     // 只有独立 Config 节点读取工作流元数据；普通图片/视频/音频节点始终按基础模型生成。
     const workflowProvider = mode !== "text" && node?.type === CanvasNodeType.Config && resolveCanvasWorkflowProvider(node.metadata) === "runninghub" ? "runninghub" : "model";
     const defaultModel = mode === "image" ? config.imageModel : mode === "video" ? config.videoModel : mode === "audio" ? config.audioModel : config.textModel;
     const fallbackModel = mode === "image" ? defaultConfig.imageModel : mode === "video" ? defaultConfig.videoModel : mode === "audio" ? defaultConfig.audioModel : defaultConfig.textModel;
-    const storedModel = resolveCanvasGenerationModel(config, node?.metadata?.model, mode);
+    const storedModel = resolveCanvasGenerationModel(config, selectedModel || node?.metadata?.model, mode);
+    if (selection && selectedModel && !storedModel && !displayOnly) throw new Error("节点选择的模型不支持当前生成模式，请重新选择");
     const preferredModel = storedModel || resolveCanvasGenerationModel(config, defaultModel, mode) || fallbackModel;
     // 先合并节点上的实时选择，再做兼容性匹配。否则路由只看到全局默认值，节点改过的时长、分辨率或布尔能力无法参与分流。
     const workflowParameters = node?.metadata?.workflowParameters || {};
@@ -507,10 +514,10 @@ export function buildGenerationConfig(config: AiConfig, node: CanvasNodeData | u
         quality: generationDefaults.quality || requestedConfig.quality,
         size: generationDefaults.size ?? requestedConfig.size,
         transparentBackground: generationDefaults.transparentBackground || (requestedConfig.transparentBackground === "true" ? "true" : "false"),
-        videoSeconds: generationDefaults.videoSeconds || requestedConfig.videoSeconds,
+        videoSeconds: generationDefaults.videoSeconds ?? requestedConfig.videoSeconds,
         vquality: generationDefaults.vquality ?? requestedConfig.vquality,
-        videoGenerateAudio: generationDefaults.videoGenerateAudio || requestedConfig.videoGenerateAudio,
-        videoWatermark: generationDefaults.videoWatermark || requestedConfig.videoWatermark,
+        videoGenerateAudio: generationDefaults.videoGenerateAudio ?? requestedConfig.videoGenerateAudio,
+        videoWatermark: generationDefaults.videoWatermark ?? requestedConfig.videoWatermark,
         videoArkPrivateAssetUpload: requestedConfig.videoArkPrivateAssetUpload,
         count: generationDefaults.count || requestedConfig.count,
     };