feat(magic-notes): add rich table editing

Add native Quill table insertion and contextual row, column, and table actions. Preserve table-only drafts through composer validation, IPC, and storage, and document the saved behavior.\n\nRelease note: 魔法笔记支持插入和编辑表格，空单元格表格也可保存并在重新打开后恢复。

docs/features/magic-notes/progress.md

@@ -1,5 +1,24 @@
 # Magic Notes Progress
 
+## 2026-10-08: Rich Text Table Editor Fix
+
+Replaced the Electron-incompatible native prompt flow for table insertion with the shared form
+Modal. The dialog validates 1-20 rows and 1-12 columns, supports cancellation and Escape, restores
+focus to the toolbar trigger, and preserves the editor selection while it is open. Table row,
+column, and delete controls now use compact localized icon buttons, remain disabled outside a table
+cell, guard against nested insertion, preserve the active cell, and create separate Quill undo
+steps. Non-empty table Delta content remains readable in the read-only record renderer.
+
+Focused validation: `npx vitest run src/renderer/src/MagicNoteEditor.test.tsx
+src/renderer/src/MagicNoteContent.test.tsx` passed 18 tests. `npm run typecheck` and affected-file
+ESLint passed. Full suite and runtime Electron validation were not run.
+
+The table content check now also applies to save validation. An empty-cell table remains an active
+draft after focus leaves the composer, saves through the renderer, IPC and storage layers, and is
+restored after reopening. A rich Delta containing only a terminal newline remains rejected, and a
+failed save leaves the draft available for retry. Focused renderer and storage regression tests
+cover these cases.
+
 ## 2026-10-03: Compact Notes List And Narrow Drawer
 
 The notes list now defaults to 200px with a 160px minimum. At workspace widths

docs/features/magic-notes/technical-design.md

@@ -71,6 +71,16 @@ save remounts at the returned revision and establishes a new baseline; an unchan
 background revision retains the existing editor and baseline. Aborted canvas
 initialization and file reads for an unmounted text editor cannot write back.
 
+Rich text tables remain native Quill table Delta operations. Insertion stores the active editor
+range while the shared table-size dialog is open, rejects invalid dimensions before changing the
+Delta, and refuses insertion when that range is already a table cell. Row, column, and whole-table
+commands require a cell selection, preserve the selected range, and cut Quill history around each
+command so each toolbar action is independently undoable. The read-only rich renderer loads the
+same Delta with Quill's `readOnly` mode, so table content follows the same persisted schema without
+an editable toolbar. A table row operation is content even when its cell text is empty: the
+workspace keeps the composer open after focus leaves it and submits the Delta through the normal
+IPC and storage path. A genuinely empty rich Delta is still rejected before IPC.
+
 The real saved formatted-text probe reproduced identical values with different
 Delta key order: storage returned `{insert, attributes}` and Quill emitted
 `{attributes, insert}`. The old `JSON.stringify` comparison therefore reported

docs/features/magic-notes/ui-design.md

@@ -49,4 +49,12 @@
 
 Tab 使用工作栏现有的共享页签、焦点和关闭模式。搜索有持久标签，列表用可键盘访问的按钮；打开采集后聚焦预览，取消返回触发按钮，触发按钮已不可见时尝试返回会话标题菜单按钮。新建标题出现后聚焦输入框。面板中的 Escape 取消当前草稿，或从详情返回列表；需要放弃输入时先显示草稿确认。确认框初始聚焦“继续编辑”，限制 Tab 焦点范围，Escape 保留草稿并关闭确认。
 
+## 富文本表格
+
+富文本编辑器使用共享表单 Modal 插入表格，行数限制为 1-20，列数限制为
+1-12。取消、关闭、Escape 和遮罩点击不会修改内容，关闭后焦点返回“插入表格”
+按钮。表格操作使用紧凑图标按钮，保留本地化的可访问名称和提示；未选中表格单元格
+时，插入行、插入列和删除操作保持禁用，避免误操作或嵌套表格。每个表格操作形成
+独立的撤销步骤。已保存表格在只读记录视图中继续由 Quill 以不可编辑单元格显示。
+
 面板服从工作栏现有宽度和停靠规则，以单列切换列表、详情和采集编辑。按钮组可换行，文字摘要保留换行并折行长文本；Markdown 和代码以原始文字显示。头部与快速追加区固定，中间内容独立滚动；完整预览输入区可纵向调整大小。配色、按钮、焦点环、通知和确认使用共享组件与令牌。真实 Electron 已在实测 214px 面板验证无横向溢出，以及原生键盘返回列表、打开笔记和追加保存。