Initial TrueGrowth source import

openspec/changes/archive/2026-04-29-add-canvas-markdown-kb-actions/proposal.md

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+# Change: Canvas Markdown 卡片知识库操作与内容合并
+
+## Why
+画布 Markdown 卡片的 popup-toolbar 缺少直接保存到知识库的入口，且删除旁的 duplicate 按钮对卡片错误地执行了复制文本而不是克隆元素。多选 Markdown 卡片/文本元素时，也缺少面向知识沉淀的内容合并能力。
+
+## What Changes
+- 在 popup-toolbar 为未关联知识库的 Markdown 卡片增加“保存到知识库”入口
+- 修复 Markdown 卡片 duplicate 行为，使其真正克隆卡片而不是复制文本
+- 为多选 Markdown 卡片和纯文本元素增加“合并内容”入口
+- 合并时同步收敛知识库关联，保留一个笔记并删除多余关联笔记
+
+## Impact
+- Affected specs: `canvas-markdown-toolbar`
+- Affected code:
+  - `packages/drawnix/src/components/toolbar/popup-toolbar/popup-toolbar.tsx`
+  - `packages/drawnix/src/utils/card-actions.ts`
+  - `packages/drawnix/src/plugins/with-card.ts`

openspec/changes/archive/2026-04-29-add-canvas-markdown-kb-actions/specs/canvas-markdown-toolbar/spec.md

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+## ADDED Requirements
+
+### Requirement: Canvas Markdown 卡片知识库保存入口
+The system SHALL expose a save-to-knowledge-base action in the canvas popup toolbar when the current selection is a single Markdown card that has not been linked to a knowledge-base note.
+
+#### Scenario: Save an unlinked card to the knowledge base
+- **GIVEN** the user selects a single Markdown card on the canvas
+- **AND** the card does not have a `noteId`
+- **WHEN** the popup toolbar is shown
+- **THEN** the toolbar SHALL display a save-to-knowledge-base action
+- **AND** activating the action SHALL create a knowledge-base note from the card content
+- **AND** the created note id SHALL be written back to the card
+
+### Requirement: Markdown 卡片 duplicate 必须克隆元素
+The system SHALL duplicate a selected Markdown card as a new canvas card element instead of copying its text content to the clipboard.
+
+#### Scenario: Duplicate a linked Markdown card
+- **GIVEN** the user selects a single Markdown card on the canvas
+- **AND** the card may already be linked to a knowledge-base note
+- **WHEN** the user activates the duplicate action in the popup toolbar
+- **THEN** the system SHALL create a new Markdown card element with the same visible content
+- **AND** the new card SHALL not reuse the original card's knowledge-base note id
+
+### Requirement: Markdown 卡片与文本元素内容合并
+The system SHALL expose a merge-content action in the canvas popup toolbar when the current multi-selection contains only Markdown cards and plain text elements.
+
+#### Scenario: Merge selected Markdown cards and text elements
+- **GIVEN** the user selects multiple canvas elements
+- **AND** every selected element is either a Markdown card or a plain text element
+- **WHEN** the popup toolbar is shown
+- **THEN** the toolbar SHALL display a merge-content action
+- **AND** activating the action SHALL merge all selected content into a single Markdown card
+- **AND** the merge order SHALL follow the canvas position rule of right into left and bottom into top
+- **AND** all merged-away elements SHALL be removed from the canvas
+
+### Requirement: 合并时收敛知识库关联
+The system SHALL preserve at most one knowledge-base note binding after a content merge and delete any extra linked notes.
+
+#### Scenario: Merge selection with multiple linked notes
+- **GIVEN** the user merges multiple selected Markdown cards or text elements
+- **AND** more than one selected card is linked to a different knowledge-base note
+- **WHEN** the merge completes
+- **THEN** the merged Markdown card SHALL keep exactly one knowledge-base note id
+- **AND** the preserved knowledge-base note SHALL be updated with the merged content
+- **AND** every other linked knowledge-base note from the merged selection SHALL be deleted

openspec/changes/archive/2026-04-29-add-canvas-markdown-kb-actions/tasks.md

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+## 1. Implementation
+- [x] 1.1 为 Canvas Markdown 卡片补充保存到知识库按钮和 helper
+- [x] 1.2 修复 popup-toolbar duplicate 对 Markdown 卡片的错误复制逻辑
+- [x] 1.3 实现 Markdown 卡片与纯文本元素的内容合并
+- [x] 1.4 实现合并后的知识库关联保留/删除规则
+- [x] 1.5 补充定向测试或校验并更新任务状态