fix(web): preserve task checkbox state (#5867)

web/src/components/MemoContent/TaskListItem.tsx

@@ -61,7 +61,7 @@ export const TaskListItem: React.FC<TaskListItemProps> = ({ checked, node: _node
         name: memo.name,
         content: newContent,
       },
-      updateMask: ["content"],
+      updateMask: ["content", "update_time"],
     });
   };
 

web/src/components/MemoContent/constants.ts

@@ -32,6 +32,7 @@ const TRUSTED_IFRAME_SRC_PATTERNS = [
 const KATEX_INLINE_CLASS_NAMES = ["language-math", "math-inline"] as const;
 const KATEX_BLOCK_CLASS_NAMES = ["language-math", "math-display"] as const;
 const SPAN_CLASS_NAMES = ["mention", "tag"] as const;
+const INPUT_ATTRIBUTES = [...(defaultSchema.attributes?.input || []), ["checked", true]] as const;
 
 export const isTrustedIframeSrc = (src: string): boolean => TRUSTED_IFRAME_SRC_PATTERNS.some((pattern) => pattern.test(src));
 
@@ -49,6 +50,7 @@ export const SANITIZE_SCHEMA = {
   attributes: {
     ...defaultSchema.attributes,
     img: [...(defaultSchema.attributes?.img || []), "height", "width"],
+    input: INPUT_ATTRIBUTES,
     code: [...(defaultSchema.attributes?.code || []), ["className", ...KATEX_INLINE_CLASS_NAMES, ...KATEX_BLOCK_CLASS_NAMES]],
     span: [...(defaultSchema.attributes?.span || []), ["className", ...SPAN_CLASS_NAMES], ["aria*"], ["data*"]],
     iframe: [

web/src/components/MemoEditor/hooks/useAutoSave.ts

@@ -1,11 +1,15 @@
-import { useEffect, useRef } from "react";
+import { useCallback, useEffect, useRef } from "react";
 import { cacheService } from "../services";
 
 export const useAutoSave = (content: string, username: string, cacheKey: string | undefined, enabled = true) => {
   const latestContentRef = useRef(content);
+  const discardedContentRef = useRef<string | undefined>(undefined);
 
   useEffect(() => {
     latestContentRef.current = content;
+    if (discardedContentRef.current !== undefined && discardedContentRef.current !== content) {
+      discardedContentRef.current = undefined;
+    }
   }, [content]);
 
   useEffect(() => {
@@ -20,6 +24,10 @@ export const useAutoSave = (content: string, username: string, cacheKey: string
 
     const key = cacheService.key(username, cacheKey);
     const flushDraft = () => {
+      if (discardedContentRef.current === latestContentRef.current) {
+        return;
+      }
+
       cacheService.saveNow(key, latestContentRef.current);
     };
     const handleVisibilityChange = () => {
@@ -39,4 +47,12 @@ export const useAutoSave = (content: string, username: string, cacheKey: string
       document.removeEventListener("visibilitychange", handleVisibilityChange);
     };
   }, [username, cacheKey, enabled]);
+
+  const discardDraft = useCallback(() => {
+    const key = cacheService.key(username, cacheKey);
+    discardedContentRef.current = latestContentRef.current;
+    cacheService.clear(key);
+  }, [username, cacheKey]);
+
+  return { discardDraft };
 };

web/src/components/MemoEditor/hooks/useMemoInit.ts

@@ -22,19 +22,13 @@ export const useMemoInit = ({ editorRef, memo, cacheKey, username, autoFocus, de
     if (initializedRef.current) return;
     initializedRef.current = true;
     const key = cacheService.key(username, cacheKey);
-    const cachedContent = cacheService.load(key);
 
     if (memo) {
       const initialState = memoService.fromMemo(memo);
-      // Prefer cached draft over the saved memo content when the user had unsaved
-      // changes (e.g. tab was suspended mid-edit). Uses strict string comparison
-      // against memo.content — both values come from the same proto serialization
-      // path, so format is consistent and whitespace differences are intentional.
-      if (cachedContent.trim() && cachedContent !== memo.content) {
-        initialState.content = cachedContent;
-      }
+      cacheService.clear(key);
       dispatch(actions.initMemo(initialState));
     } else {
+      const cachedContent = cacheService.load(key);
       if (cachedContent) {
         dispatch(actions.updateContent(cachedContent));
       }

web/src/components/MemoEditor/index.tsx

@@ -23,7 +23,7 @@ import {
 import { FOCUS_MODE_STYLES } from "./constants";
 import type { EditorRefActions } from "./Editor";
 import { useAudioRecorder, useAutoSave, useFocusMode, useKeyboard, useMemoInit } from "./hooks";
-import { cacheService, errorService, memoService, transcriptionService, validationService } from "./services";
+import { errorService, memoService, transcriptionService, validationService } from "./services";
 import { EditorProvider, useEditorContext } from "./state";
 import type { MemoEditorProps } from "./types";
 import type { LocalFile } from "./types/attachment";
@@ -69,9 +69,10 @@ const MemoEditorImpl: React.FC<MemoEditorProps> = ({
   const defaultVisibility = userGeneralSetting?.memoVisibility ? convertVisibilityFromString(userGeneralSetting.memoVisibility) : undefined;
 
   const { isInitialized } = useMemoInit({ editorRef, memo, cacheKey, username: currentUser?.name ?? "", autoFocus, defaultVisibility });
+  const isDraftCacheEnabled = !memo;
 
   // Auto-save content to localStorage
-  useAutoSave(state.content, currentUser?.name ?? "", cacheKey, isInitialized);
+  const { discardDraft } = useAutoSave(state.content, currentUser?.name ?? "", cacheKey, isInitialized && isDraftCacheEnabled);
 
   // Focus mode management with body scroll lock
   useFocusMode(state.ui.isFocusMode);
@@ -229,8 +230,9 @@ const MemoEditorImpl: React.FC<MemoEditorProps> = ({
         return;
       }
 
-      // Clear localStorage cache on successful save
-      cacheService.clear(cacheService.key(currentUser?.name ?? "", cacheKey));
+      // Clear localStorage cache on successful save and prevent the unmount
+      // flush from writing the just-saved content back as a stale draft.
+      discardDraft();
 
       // Invalidate React Query cache to refresh memo lists across the app
       const invalidationPromises = [

web/src/components/MemoEditor/services/cacheService.ts

@@ -1,6 +1,33 @@
 export const CACHE_DEBOUNCE_DELAY = 500;
 
 const pendingSaves = new Map<string, ReturnType<typeof window.setTimeout>>();
+const STRUCTURED_CACHE_ENTRY_KIND = "memos.editor-cache";
+const STRUCTURED_CACHE_ENTRY_VERSION = 1;
+
+function deserializeContent(raw: string): string {
+  try {
+    const parsed = JSON.parse(raw) as { kind?: unknown; version?: unknown; content?: unknown };
+    if (
+      parsed.kind === STRUCTURED_CACHE_ENTRY_KIND &&
+      parsed.version === STRUCTURED_CACHE_ENTRY_VERSION &&
+      typeof parsed.content === "string"
+    ) {
+      return parsed.content;
+    }
+  } catch {
+    // Drafts have historically been stored as raw markdown strings.
+  }
+
+  return raw;
+}
+
+function writeEntry(key: string, content: string): void {
+  if (content.trim()) {
+    localStorage.setItem(key, content);
+  } else {
+    localStorage.removeItem(key);
+  }
+}
 
 export const cacheService = {
   key: (username: string, cacheKey?: string): string => {
@@ -16,11 +43,7 @@ export const cacheService = {
     const timeoutId = window.setTimeout(() => {
       pendingSaves.delete(key);
 
-      if (content.trim()) {
-        localStorage.setItem(key, content);
-      } else {
-        localStorage.removeItem(key);
-      }
+      writeEntry(key, content);
     }, CACHE_DEBOUNCE_DELAY);
 
     pendingSaves.set(key, timeoutId);
@@ -33,15 +56,12 @@ export const cacheService = {
       pendingSaves.delete(key);
     }
 
-    if (content.trim()) {
-      localStorage.setItem(key, content);
-    } else {
-      localStorage.removeItem(key);
-    }
+    writeEntry(key, content);
   },
 
   load(key: string): string {
-    return localStorage.getItem(key) || "";
+    const raw = localStorage.getItem(key);
+    return raw ? deserializeContent(raw) : "";
   },
 
   clear(key: string): void {

web/src/hooks/useMemoQueries.ts

@@ -1,9 +1,10 @@
 import { create } from "@bufbuild/protobuf";
 import { FieldMaskSchema } from "@bufbuild/protobuf/wkt";
+import type { InfiniteData } from "@tanstack/react-query";
 import { useInfiniteQuery, useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { memoServiceClient } from "@/connect";
 import { userKeys } from "@/hooks/useUserQueries";
-import type { ListMemosRequest, Memo } from "@/types/proto/api/v1/memo_service_pb";
+import type { ListMemosRequest, ListMemosResponse, Memo } from "@/types/proto/api/v1/memo_service_pb";
 import { ListMemosRequestSchema, MemoSchema } from "@/types/proto/api/v1/memo_service_pb";
 
 // Query keys factory for consistent cache management
@@ -16,6 +17,96 @@ export const memoKeys = {
   comments: (name: string) => [...memoKeys.all, "comments", name] as const,
 };
 
+type MemoPatch = Partial<Memo> & Pick<Memo, "name">;
+type MemoCollectionQueryData = ListMemosResponse | InfiniteData<ListMemosResponse>;
+
+function isMemoListResponse(data: unknown): data is ListMemosResponse {
+  return typeof data === "object" && data !== null && Array.isArray((data as { memos?: unknown }).memos);
+}
+
+function isInfiniteMemoListData(data: unknown): data is InfiniteData<ListMemosResponse> {
+  return typeof data === "object" && data !== null && Array.isArray((data as { pages?: unknown }).pages);
+}
+
+function patchMemoListResponse(response: ListMemosResponse, update: MemoPatch): ListMemosResponse {
+  let changed = false;
+  const memos = response.memos.map((memo) => {
+    if (memo.name !== update.name) {
+      return memo;
+    }
+
+    changed = true;
+    return { ...memo, ...update };
+  });
+
+  return changed ? { ...response, memos } : response;
+}
+
+function patchMemoListQueryData<T>(data: T | undefined, update: MemoPatch): T | undefined {
+  if (!data) {
+    return data;
+  }
+
+  if (isMemoListResponse(data)) {
+    return patchMemoListResponse(data, update) as T;
+  }
+
+  if (isInfiniteMemoListData(data)) {
+    let changed = false;
+    const pages = data.pages.map((page) => {
+      const patchedPage = patchMemoListResponse(page, update);
+      if (patchedPage !== page) {
+        changed = true;
+      }
+      return patchedPage;
+    });
+
+    return (changed ? { ...data, pages } : data) as T;
+  }
+
+  return data;
+}
+
+function findMemoInListResponse(response: ListMemosResponse, name: string): Memo | undefined {
+  return response.memos.find((memo) => memo.name === name);
+}
+
+function findMemoInQueryData(data: unknown, name: string): Memo | undefined {
+  if (!data) {
+    return undefined;
+  }
+
+  if (isMemoListResponse(data)) {
+    return findMemoInListResponse(data, name);
+  }
+
+  if (isInfiniteMemoListData(data)) {
+    for (const page of data.pages) {
+      const memo = findMemoInListResponse(page, name);
+      if (memo) {
+        return memo;
+      }
+    }
+  }
+
+  return undefined;
+}
+
+function findMemoInCollectionQueries(queryClient: ReturnType<typeof useQueryClient>, name: string): Memo | undefined {
+  for (const [, data] of queryClient.getQueriesData<unknown>({ queryKey: memoKeys.all })) {
+    const memo = findMemoInQueryData(data, name);
+    if (memo) {
+      return memo;
+    }
+  }
+
+  return undefined;
+}
+
+function patchMemoInCollectionQueries(queryClient: ReturnType<typeof useQueryClient>, update: MemoPatch) {
+  queryClient.setQueriesData<MemoCollectionQueryData>({ queryKey: memoKeys.all }, (data) => patchMemoListQueryData(data, update));
+}
+
 export function useMemos(request: Partial<ListMemosRequest> = {}) {
   return useQuery({
     queryKey: memoKeys.list(request),
@@ -94,15 +185,18 @@ export function useUpdateMemo() {
       }
 
       // Cancel outgoing refetches to prevent race conditions
-      await queryClient.cancelQueries({ queryKey: memoKeys.detail(update.name) });
+      await queryClient.cancelQueries({ queryKey: memoKeys.all });
 
       // Snapshot previous value for rollback on error
-      const previousMemo = queryClient.getQueryData<Memo>(memoKeys.detail(update.name));
+      const previousMemo =
+        queryClient.getQueryData<Memo>(memoKeys.detail(update.name)) || findMemoInCollectionQueries(queryClient, update.name);
+      const memoPatch: MemoPatch = { ...update, name: update.name };
 
       // Optimistically update the cache
       if (previousMemo) {
-        queryClient.setQueryData(memoKeys.detail(update.name), { ...previousMemo, ...update });
+        queryClient.setQueryData(memoKeys.detail(update.name), { ...previousMemo, ...memoPatch });
       }
+      patchMemoInCollectionQueries(queryClient, memoPatch);
 
       return { previousMemo };
     },
@@ -110,11 +204,15 @@ export function useUpdateMemo() {
       // Rollback on error
       if (context?.previousMemo && update.name) {
         queryClient.setQueryData(memoKeys.detail(update.name), context.previousMemo);
+        patchMemoInCollectionQueries(queryClient, context.previousMemo);
+      } else {
+        queryClient.invalidateQueries({ queryKey: memoKeys.all });
       }
     },
     onSuccess: (updatedMemo) => {
       // Update cache with server response
       queryClient.setQueryData(memoKeys.detail(updatedMemo.name), updatedMemo);
+      patchMemoInCollectionQueries(queryClient, updatedMemo);
       // Invalidate lists to refresh
       queryClient.invalidateQueries({ queryKey: memoKeys.lists() });
       if (updatedMemo.parent) {

web/tests/memo-content-security.test.tsx

@@ -4,6 +4,7 @@ import ReactMarkdown from "react-markdown";
 import rehypeKatex from "rehype-katex";
 import rehypeRaw from "rehype-raw";
 import rehypeSanitize from "rehype-sanitize";
+import remarkGfm from "remark-gfm";
 import remarkMath from "remark-math";
 import { describe, expect, it } from "vitest";
 import { SANITIZE_SCHEMA, isTrustedIframeSrc } from "@/components/MemoContent/constants";
@@ -28,6 +29,13 @@ const renderMemoContent = (content: string): string =>
     </ReactMarkdown>,
   );
 
+const renderGfmContent = (content: string): string =>
+  renderToStaticMarkup(
+    <ReactMarkdown remarkPlugins={[remarkGfm]} rehypePlugins={[[rehypeSanitize, SANITIZE_SCHEMA]]}>
+      {content}
+    </ReactMarkdown>,
+  );
+
 describe("memo content sanitization", () => {
   it("strips user-controlled inline styles from raw HTML spans", () => {
     const html = renderMemoContent('<span style="position:fixed;inset:0;z-index:99999">overlay</span>');
@@ -43,6 +51,15 @@ describe("memo content sanitization", () => {
     expect(html).toMatch(/class="katex"/);
     expect(html).toMatch(/class="katex-html"/);
   });
+
+  it("preserves checked state for GFM task list items", () => {
+    const html = renderGfmContent("- [x] Done\n- [ ] Todo");
+    const inputs = html.match(/<input[^>]+\/>/g) ?? [];
+
+    expect(inputs).toHaveLength(2);
+    expect(inputs[0]).toContain('checked=""');
+    expect(inputs[1]).not.toContain('checked=""');
+  });
 });
 
 describe("trusted iframe providers", () => {

web/tests/memo-editor-cache.test.ts

@@ -0,0 +1,57 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { cacheService } from "@/components/MemoEditor/services/cacheService";
+
+describe("memo editor cache", () => {
+  beforeEach(() => {
+    const storage = new Map<string, string>();
+    vi.stubGlobal("localStorage", {
+      getItem: vi.fn((key: string) => storage.get(key) ?? null),
+      setItem: vi.fn((key: string, value: string) => storage.set(key, value)),
+      removeItem: vi.fn((key: string) => storage.delete(key)),
+    });
+    cacheService.clearAll();
+  });
+
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it("stores draft content", () => {
+    const key = cacheService.key("users/steven", "home-memo-editor");
+
+    cacheService.saveNow(key, "- [x] Draft task");
+
+    expect(cacheService.load(key)).toBe("- [x] Draft task");
+  });
+
+  it("removes empty draft content instead of caching it", () => {
+    const key = cacheService.key("users/steven", "home-memo-editor");
+
+    cacheService.saveNow(key, "");
+
+    expect(cacheService.load(key)).toBe("");
+  });
+
+  it("loads content from previously structured draft entries", () => {
+    const key = cacheService.key("users/steven", "home-memo-editor");
+    localStorage.setItem(key, JSON.stringify({ kind: "memos.editor-cache", version: 1, content: "- [ ] migrated task" }));
+
+    expect(cacheService.load(key)).toBe("- [ ] migrated task");
+  });
+
+  it("keeps raw JSON markdown drafts intact", () => {
+    const key = cacheService.key("users/steven", "home-memo-editor");
+    const jsonDraft = '{"content":"not a cache envelope"}';
+    localStorage.setItem(key, jsonDraft);
+
+    expect(cacheService.load(key)).toBe(jsonDraft);
+  });
+
+  it("keeps structured-looking drafts without a supported version intact", () => {
+    const key = cacheService.key("users/steven", "home-memo-editor");
+    const jsonDraft = JSON.stringify({ kind: "memos.editor-cache", content: "not a supported envelope" });
+    localStorage.setItem(key, jsonDraft);
+
+    expect(cacheService.load(key)).toBe(jsonDraft);
+  });
+});