feat(canvas): update canvas tool behavior to allow temporary switching between Select and Move modes using Control or Space

docs/content/docs/progress/pending-test.mdx

@@ -7,7 +7,7 @@ description: Implemented changes that still need manual verification
 
 The current release needs manual verification in these areas:
 
-- Canvas navigation: the bottom toolbar should switch between Select and Move modes and reflect the active mode with its icon; Select should draw a clearly spaced dashed range whose dash length, gap, and stroke width remain visually constant at every zoom level, while Move should pan from either the background or a node. Holding Control or Space should temporarily pan without changing the selected toolbar mode; middle-button panning and additive node selection with Shift/Cmd should continue to work.
+- Canvas navigation: the bottom toolbar should switch between Select and Move modes and reflect the active mode with its icon; Select should draw a clearly spaced dashed range whose dash length, gap, and stroke width remain visually constant at every zoom level, while Move should pan from either the background or a node. Holding Control or Space should temporarily invert the active tool without changing the toolbar mode: Select becomes Move, and Move becomes range selection. After clicking any canvas-page button, pressing Space should only invert the tool and must not trigger that button again. Middle-button panning and additive node selection with Shift/Cmd should continue to work, while Space remains available inside text inputs and editable content.
 - English and Simplified Chinese switching across navigation, settings, titles, descriptions, Ant Design components, and persisted preferences.
 - Global Dropdown, Menu, Select, Cascader, and TreeSelect popup backgrounds, hover states, and selected states in both light and dark themes.
 - Canvas node resize stability, prompt scrolling, generated-prompt restoration, image editing, drag-and-drop references, and generation configuration.

docs/content/docs/progress/pending-test.zh-CN.mdx

@@ -5,7 +5,7 @@ description: 当前版本已实现但仍需人工验证的变更项
 
 # 待测试
 
-- 画布选择与平移：左下工具栏应能切换「选择」与「移动」模式并用图标显示当前模式；选择模式拖动空白区域应显示疏朗清晰的虚线框，虚线长度、间距和粗细在任意缩放比例下保持一致；移动模式应能从空白区域或节点上拖动画布。按住 Control 或空格应临时平移且不改变工具栏模式，中键平移以及 Shift/Cmd 追加选择节点应继续可用。
+- 画布选择与平移：左下工具栏应能切换「选择」与「移动」模式并用图标显示当前模式；选择模式拖动空白区域应显示疏朗清晰的虚线框，虚线长度、间距和粗细在任意缩放比例下保持一致；移动模式应能从空白区域或节点上拖动画布。按住 Control 或空格应临时反转当前工具且不改变工具栏模式，即选择变移动、移动变范围选择；点击画布页任意按钮后按空格应只临时切换工具，不得再次触发该按钮；输入框和可编辑文本内仍可正常输入空格。中键平移以及 Shift/Cmd 追加选择节点应继续可用。
 - 文档站国际化：访问文档站首页及 `/docs` 应默认显示英文，切换简体中文后 URL 应带 `/zh-CN` 且首页、顶部导航、侧边栏、正文、搜索框和页面操作文案均显示中文；刷新、站内跳转和再次切回 English 后语言应保持正确，搜索结果与 Markdown/LLM 文档内容不得混入另一种语言。
 - 国际化基础框架：从页面右上角切换简体中文或 English 后，首页、顶部及移动端导航、版本弹窗、配置主面板、渠道编辑、模型选择、页面标题、页面描述和 Ant Design 内置文案应立即切换，刷新页面后保持所选语言；偏好设置中不应再显示语言选项，WebDAV 同步错误、提示词来源及其他尚未接入翻译的业务模块暂时仍可能显示中文。
 - 全局弹层主题：全站 Dropdown、Menu、Select、Cascader、TreeSelect 等弹层在浅色主题下应使用白色背景、轻灰悬停和选中态，在深色主题下应使用深色背景与低对比度浅色交互态，不应再出现默认黑灰色块、文字对比不足或单个页面配色不一致。