fix(*): 画布生成与邮件 - 合并 PR #423 并修复恢复关联和规格报价

保留 PR 原始提交，合并待测试文档双方内容。补齐摘要 nodeId 消费端，修复缺省质量的 <nil> 匹配，并移除报价面板按价格档篡改自动质量的行为。

验证：前端完整测试脚本 1139 项通过，生产构建通过；后端相关专项通过。全量后端存在 4 项基线可复现失败；另一次资源清理测试出现 SQLite 表锁，合并分支与基线单独重跑通过。未执行真实 SMTP、浏览器端到端或收费生成。

web/test/generation-task-local.test.ts

@@ -11,6 +11,15 @@ import { CanvasNodeType, type CanvasNodeData } from "../src/types/canvas";
 import { onlineToolToOps } from "../src/components/canvas/canvas-assistant-panel";
 import { generationTaskShowsProgress, generationTaskStageLabel, generationTaskStatusLabel } from "../src/lib/generation-task-display";
 import { generationErrorMessage } from "../src/lib/generation-error";
+import { generationTaskNodeId } from "../src/lib/canvas/canvas-generation-task-sync";
+
+test("canvas recovery reads node identity from task summaries without full task input", () => {
+    const task: GenerationTask = { id: "task-summary", type: "canvas_image", status: "running", prompt: "", attempts: 1, createdAt: "", updatedAt: "", clientContext: { nodeId: "node-summary" } };
+    expect(generationTaskNodeId(task)).toBe("node-summary");
+    expect(generationTaskNodeId({ ...task, inputJson: "invalid json" })).toBe("node-summary");
+    expect(generationTaskNodeId({ ...task, clientContext: undefined, inputJson: JSON.stringify({ metadata: { nodeId: "node-detail" } }) })).toBe("node-detail");
+    expect(generationTaskNodeId({ ...task, clientContext: undefined })).toBe("");
+});
 
 function compactSource(source: string) {
     return source.replace(/\s+/g, " ").trim();