feat(canvas): 图片转换插件 - 增加本地媒体转换节点与运行时

web/src/lib/plugins/builtin/index.ts

@@ -3,4 +3,5 @@ import "./prompt-optimizer";
 import "./workflows";
 import "./portrait-clearance";
 import "./ai-art-critique";
+import "./media-conversion";
 import "./editor/editor-shell";

web/src/lib/plugins/builtin/media-conversion.ts

@@ -0,0 +1,37 @@
+import { MEDIA_CONVERSION_NODE_TYPE } from "@/lib/media-conversion/contracts";
+
+import { registerPlugin } from "../plugin-registry";
+import { PLUGIN_API_VERSION, type PluginManifest, type RegisteredPlugin } from "../plugin-types";
+
+export const MEDIA_CONVERSION_PLUGIN_ID = "media-conversion";
+
+const manifest: PluginManifest = {
+    apiVersion: PLUGIN_API_VERSION,
+    id: MEDIA_CONVERSION_PLUGIN_ID,
+    name: "媒体转换节点",
+    version: "0.1.0",
+    publishedAt: "2026-09-08",
+    updatedAt: "2026-09-08",
+    description: "在画布中提供图片转换节点，支持灰度、Canny 边缘、AI 线稿、本地 Depth Anything V2 深度图和 OpenPose 姿态骨架。",
+    documentation:
+        "# 媒体转换节点\n\n连接图片到转换节点后，可以在节点内选择灰度图、Canny 边缘、AI 线稿、深度图或姿态骨架。AI 线稿使用本机 ControlNet Aux 预处理模型，深度图使用本机已安装的 Depth Anything V2 Small 模型，姿态骨架使用 ControlNet Aux 的 OpenPose 人体预处理模型运行；这些操作都不会加载 Stable Diffusion 重绘管线。姿态转换只绘制人体骨架，未检测到人物时会跳过并提示。视频转换和透明抠图模型仍在验证，暂时会明确提示不可用。\n\n该插件只读取当前节点的媒体输入，并把结果保存回当前画布节点的本地素材存储。",
+    author: "影策团队",
+    surfaces: ["node"],
+    permissions: ["canvas.read", "canvas.write", "media.read"],
+    trusted: true,
+    runtime: { web: "declarative" },
+    contributes: {
+        transforms: [
+            {
+                id: MEDIA_CONVERSION_NODE_TYPE,
+                input: "media",
+                output: "media",
+                runtime: "declarative",
+            },
+        ],
+    },
+};
+
+export const mediaConversionPlugin: RegisteredPlugin = { manifest };
+
+registerPlugin(mediaConversionPlugin);

web/src/lib/plugins/plugin-types.ts

@@ -103,8 +103,10 @@ export type PluginCanvasNodeContribution = {
     defaultSize: { width: number; height: number };
     schema: Record<string, unknown>;
     renderer: "declarative" | "sandbox";
-    /** Optional input contract for nodes that consume one media kind. */
-    acceptsInputKind?: "image" | "video" | "audio" | "text";
+    /** Optional input contract for nodes that consume one or more media kinds. */
+    acceptsInputKind?: "image" | "video" | "audio" | "text" | Array<"image" | "video" | "audio" | "text">;
+    /** Optional maximum number of direct inputs. */
+    maxInputCount?: number;
     /** Analysis/sink nodes can hide the right-side output connection. */
     showOutputConnection?: boolean;
 };