refactor(canvas): 节点注册表 - 收敛节点展示与几何知识到单一数据源

每加一种画布节点，叫什么、长什么样、能不能自由拉伸要在 4-5 处各写一遍。
实际后果是节点标签出现三份且互相矛盾（NODE_DEFAULT_SIZE.title / 创建菜单 label /
搜索弹窗 nodeTypeLabel），canvas-node-size.ts 里还有第四份硬编码兜底。

新增 lib/canvas/node-registry/，镜像现有 tool-registry/ 的结构：
静态定义带 satisfies Record<CanvasNodeType, ...> 做编译期穷尽性检查
（往枚举加成员不补定义即编译失败），再注册进模块级 Map 并按 ownerId 归属，
为后续扩展留出隔离位。

尺寸与初始 metadata 的数据源仍是 constant/canvas.ts 的 NODE_SPECS，定义文件读它
而非复制，现有约 40 处布局计算未动；渲染层 nodeContentRenderers 已是查表结构，
本次不改。

标签刻意分三个字段各司其职，界面文案零变化：
- defaultTitle 新建节点默认名（Note/Audio/未命名背板 原样保留）
- label UI 短标签
- listLabel 列表标签，缺省派生为 label + 节点；背板显式钉住为背板

接入 3 处调用点：创建菜单标签与图标、搜索弹窗类型标签、canvas-node.tsx 的
minWidth/minHeight 与 keepRatio。导演台落在节点分区但开的是工作台、不是节点类型，
故不走注册表。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

web/src/components/canvas/canvas-node-search-modal.tsx

@@ -3,6 +3,7 @@ import { Input, Modal } from "antd";
 import { BookOpenText, FileText, Image, Pencil, Search, Video } from "lucide-react";
 
 import { WorkspaceState } from "@/components/layout/workspace-state";
+import { getNodeListLabel } from "@/lib/canvas/node-registry";
 import { CanvasNodeType, type CanvasNodeData } from "@/types/canvas";
 
 export function CanvasNodeSearchModal({ open, nodes, onClose, onFocus }: { open: boolean; nodes: CanvasNodeData[]; onClose: () => void; onFocus: (nodeId: string) => void }) {
@@ -10,7 +11,7 @@ export function CanvasNodeSearchModal({ open, nodes, onClose, onFocus }: { open:
     const results = useMemo(() => {
         const keyword = query.trim().toLocaleLowerCase();
         if (!keyword) return nodes.slice(0, 40);
-        return nodes.filter((node) => [node.title, node.type, nodeTypeLabel(node.type), node.metadata?.prompt, node.metadata?.composerContent, node.metadata?.model, node.metadata?.chapterTitle, node.metadata?.workflowTitle, node.metadata?.workflowDescription, typeof node.metadata?.shotIndex === "number" ? `镜头 ${node.metadata.shotIndex + 1}` : "", ...(node.metadata?.assetTags || [])]
+        return nodes.filter((node) => [node.title, node.type, getNodeListLabel(node.type), node.metadata?.prompt, node.metadata?.composerContent, node.metadata?.model, node.metadata?.chapterTitle, node.metadata?.workflowTitle, node.metadata?.workflowDescription, typeof node.metadata?.shotIndex === "number" ? `镜头 ${node.metadata.shotIndex + 1}` : "", ...(node.metadata?.assetTags || [])]
             .some((value) => typeof value === "string" && value.toLocaleLowerCase().includes(keyword))).slice(0, 80);
     }, [nodes, query]);
 
@@ -44,19 +45,5 @@ export function CanvasNodeSearchModal({ open, nodes, onClose, onFocus }: { open:
 
 function nodeContextLabel(node: CanvasNodeData) {
     const location = [node.metadata?.chapterTitle, typeof node.metadata?.shotIndex === "number" ? `镜头 ${node.metadata.shotIndex + 1}` : ""].filter(Boolean).join(" · ");
-    return location || node.metadata?.prompt || node.metadata?.composerContent || node.metadata?.workflowDescription || nodeTypeLabel(node.type);
-}
-
-function nodeTypeLabel(type: CanvasNodeType) {
-    return ({
-        [CanvasNodeType.Image]: "图片节点",
-        [CanvasNodeType.Text]: "文本节点",
-        [CanvasNodeType.Drawing]: "绘图节点",
-        [CanvasNodeType.Script]: "分镜脚本节点",
-        [CanvasNodeType.Skill]: "技能节点",
-        [CanvasNodeType.Config]: "生成配置节点",
-        [CanvasNodeType.Video]: "视频节点",
-        [CanvasNodeType.Audio]: "音频节点",
-        [CanvasNodeType.Frame]: "背板",
-    } as Record<CanvasNodeType, string>)[type] || "未知节点";
+    return location || node.metadata?.prompt || node.metadata?.composerContent || node.metadata?.workflowDescription || getNodeListLabel(node.type);
 }

web/src/components/canvas/canvas-node.tsx

@@ -10,7 +10,7 @@ import { useThemeStore } from "@/stores/use-theme-store";
 import { storyboardMinNodeHeight } from "./canvas-script-node";
 import { CanvasNodeType, type CanvasNodeData, type Position } from "@/types/canvas";
 import type { CanvasResourceReference } from "@/lib/canvas/canvas-resource-references";
-import { MEDIA_NODE_MIN_SIZE } from "@/lib/canvas/canvas-node-size";
+import { getNodeMinSize, shouldKeepAspectRatio } from "@/lib/canvas/node-registry";
 import { CanvasNodeContent, CanvasNodeImageInfo } from "./canvas-node-content";
 
 type ResizeCorner = "top-left" | "top-right" | "bottom-left" | "bottom-right";
@@ -176,9 +176,10 @@ export const CanvasNode = React.memo(function CanvasNode({
 
             const dx = (event.clientX - resizeRef.current.startX) / scale;
             const dy = (event.clientY - resizeRef.current.startY) / scale;
-            const isMediaNode = data.type === CanvasNodeType.Image || data.type === CanvasNodeType.Video;
-            const minWidth = data.type === CanvasNodeType.Script ? 800 : isMediaNode ? MEDIA_NODE_MIN_SIZE.width : 220;
-            const minHeight = scriptMinHeight || (isMediaNode ? MEDIA_NODE_MIN_SIZE.height : 160);
+            const minSize = getNodeMinSize(data.type);
+            const minWidth = minSize.width;
+            // 分镜脚本的高度由表格内容动态撑开，覆盖注册表里的静态下限。
+            const minHeight = scriptMinHeight || minSize.height;
             const startRight = resizeRef.current.startLeft + resizeRef.current.startWidth;
             const startBottom = resizeRef.current.startTop + resizeRef.current.startHeight;
             const fromLeft = resizeRef.current.corner.includes("left");
@@ -230,7 +231,7 @@ export const CanvasNode = React.memo(function CanvasNode({
             startTop: data.position.y,
             startWidth: data.width,
             startHeight: data.height,
-            keepRatio: (data.type === CanvasNodeType.Image && !data.metadata?.freeResize) || data.type === CanvasNodeType.Video,
+            keepRatio: shouldKeepAspectRatio(data),
             ratio: (data.metadata?.naturalWidth || data.width) / (data.metadata?.naturalHeight || data.height || 1),
         };
         window.addEventListener("mousemove", handleResizeMove);