Replaces the two visible 'button-like' affordances with LabIcon glyphs
so the sidebar and toolbar stay compact; the explanatory text moves
to the hover tooltip.
Changes:
- Toolbar 'Save Snapshot' button: text label -> saveIcon (floppy),
tooltip '保存当前 notebook 为快照'
- Sidebar panel '快照历史' text label -> saveIcon + caption='快照历史'
(the panel tab is now icon-only)
- Sidebar refresh button: text -> refreshIcon with a 1s rotate animation
while loading
Dependencies:
- Adds @jupyterlab/ui-components to package.json (source of the
standard LabIcon set: saveIcon, refreshIcon, historyIcon)
Style:
- New .jp-snapshot-panel-refresh-button sizing (28x24 fixed box,
centered icon) and .is-loading spin keyframes
- @keyframes jp-snapshot-spin applied to the icon's .jp-Icon element
Co-Authored-By: Claude <noreply@anthropic.com>
