fix(media,canvas): 对象存储参考素材优先 URL，并同步清理图片引用提示词 (#434)

* fix(media): 对象存储参考素材 - 协议支持 URL 时优先发送签名链接

开启对象存储后，支持 URL 的上游协议优先发送 OSS/COS/七牛/S3 签名链接；必须传字节的协议仍走 Base64 或 multipart。本地资源回退字节，签发失败直接报错，不自动重发生成。

* fix(canvas): 图片引用清理 - 取消引用时同步移除提示词引用

web/test/canvas-node-generation-mentions.test.ts

@@ -93,4 +93,16 @@ describe("canvas node generation position mentions", () => {
         expect(context.prompt).toBe("让 @图片1 进入画面");
         expect(context.prompt).not.toContain("@[node:");
     });
+
+    test("取消引用后的提示词不再因为悬挂 @图片1 阻断生成", () => {
+        const target = targetNode();
+        const image = node("image-a", CanvasNodeType.Image, "data:image/png;base64,a");
+        const { applyCanvasConnectionPromptSync } = require("../src/lib/canvas/canvas-resource-references") as typeof import("../src/lib/canvas/canvas-resource-references");
+        const [nextTarget] = applyCanvasConnectionPromptSync([image, target], [connection(image.id)], [image, target], []).filter((item: typeof target) => item.id === target.id);
+        const context = buildNodeGenerationContext(nextTarget.id, [image, nextTarget], [], nextTarget.metadata?.composerContent || "", []);
+
+        expect(nextTarget.metadata?.composerContent).toBe("让 进入画面");
+        expect(context.referenceImages).toEqual([]);
+        expect(context.prompt).toBe("让 进入画面");
+    });
 });

web/test/canvas-resource-references.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, test } from "bun:test";
 
-import { buildAssetMentionReferences, buildCanvasNodeMentionReferenceMap, buildNodeMentionReferences, buildOrderedCanvasResourceReferences, canvasResourceMentionToken, collectUpstreamVideoNodes } from "../src/lib/canvas/canvas-resource-references";
+import { applyCanvasConnectionPromptSync, buildAssetMentionReferences, buildCanvasNodeMentionReferenceMap, buildNodeMentionReferences, buildOrderedCanvasResourceReferences, canvasResourceMentionToken, collectUpstreamVideoNodes } from "../src/lib/canvas/canvas-resource-references";
 import { canvasNodeToAsset } from "../src/lib/canvas/canvas-node-asset";
 import { buildNodeGenerationInputs } from "../src/components/canvas/canvas-node-generation";
 import { CanvasNodeType, type CanvasConnection, type CanvasNodeData } from "../src/types/canvas";
@@ -205,3 +205,45 @@ describe("canvas resource mention slots", () => {
         })).toBe("@[asset:asset-a]");
     });
 });
+
+describe("remove canvas resource mention tokens", () => {
+    test("取消引用后会清掉对应的 @图片N", () => {
+        const image = imageNode("image-a");
+        const target = {
+            ...videoNode("target"),
+            metadata: { composerContent: "@图片1 生成角色设定图：保持同一角色身份。" },
+        };
+        const previousConnections = [connection(image.id, target.id)];
+        const [nextTarget] = applyCanvasConnectionPromptSync([image, target], previousConnections, [image, target], []).filter((node) => node.id === target.id);
+
+        expect(nextTarget.metadata?.composerContent).toBe("生成角色设定图：保持同一角色身份。");
+        expect(nextTarget.metadata?.composerContent).not.toContain("@图片1");
+    });
+
+    test("同时存在节点 token 时一并清掉", () => {
+        const image = imageNode("image-a");
+        const target = {
+            ...videoNode("target"),
+            metadata: { composerContent: "让 @图片1 和 @[node:image-a] 一起进入画面" },
+        };
+        const [nextTarget] = applyCanvasConnectionPromptSync([image, target], [connection(image.id, target.id)], [image, target], []).filter((node) => node.id === target.id);
+        expect(nextTarget.metadata?.composerContent).toBe("让 和 一起进入画面");
+        expect(nextTarget.metadata?.composerContent).not.toContain("@图片1");
+        expect(nextTarget.metadata?.composerContent).not.toContain("@[node:image-a]");
+    });
+
+    test("多图时只清被移除的那张，并把剩余引用重新编号", () => {
+        const imageA = imageNode("image-a");
+        const imageB = imageNode("image-b");
+        const target = {
+            ...videoNode("target"),
+            metadata: { composerContent: "比较 @图片1 和 @图片2" },
+        };
+        const previousConnections = [connection(imageA.id, target.id), connection(imageB.id, target.id)];
+        const nextConnections = [connection(imageB.id, target.id)];
+        const [nextTarget] = applyCanvasConnectionPromptSync([imageA, imageB, target], previousConnections, [imageA, imageB, target], nextConnections).filter((node) => node.id === target.id);
+
+        expect(nextTarget.metadata?.composerContent).toBe("比较 和 @图片1");
+    });
+});
+