feat(tree): checkpoint resource lifecycle work

提交当前顶层 mnote Git 工作区，范围集中在 04-tree-domain 的 resource/trash/filetree 生命周期、mnote-web resource_trash 路由、Convex/Next 兼容接口、sidebar/file-tree 客户端适配、smoke 脚本与对应设计/bug 记录。

不包含被 ignore 的 design/05-editor-mainline/reference-code/leptos-tiptap 嵌套仓库改动。新增 smoke 的测试密码改为运行时读取 MNOTE_E2E_PASSWORD，避免提交明文 credential assignment。

wolai-frontend/src/lib/file-tree/clipboard.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from "vitest";
 import {
+  clearFileTreeClipboardPayload,
   decodeFileTreeClipboardPayload,
   encodeFileTreeClipboardPayload,
   inferPasteTargetDocId,
@@ -11,8 +12,19 @@ describe("file-tree clipboard payload", () => {
     const payload = { type: "mnote-file-tree" as const, version: 1 as const, action: "copy" as const, rowIds: ["doc:a", "asset:x"] };
     const text = encodeFileTreeClipboardPayload(payload);
     expect(decodeFileTreeClipboardPayload(text)).toEqual(payload);
+    const cutPayload = { ...payload, action: "cut" as const };
+    expect(decodeFileTreeClipboardPayload(encodeFileTreeClipboardPayload(cutPayload))).toEqual(cutPayload);
+    expect(
+      decodeFileTreeClipboardPayload(
+        encodeFileTreeClipboardPayload({ ...payload, action: "move" as any }),
+      ),
+    ).toBeNull();
     expect(decodeFileTreeClipboardPayload("not-a-payload")).toBeNull();
   });
+
+  it("可清空内存剪贴板", async () => {
+    await clearFileTreeClipboardPayload();
+  });
 });
 
 describe("inferPasteTargetDocId", () => {