Function updateColorHistory

notes.js:564–603

(panel, type)

        }
        
        function updateColorHistory(panel, type) {
            const key = type === 'font' ? LS_KEYS.fontColors : LS_KEYS.bgColors;
            const history = readJSON(key, []);
            
            panel.innerHTML = '';
            
            if (history.length === 0) {
                const emptyMsg = createElement('div', { className: 'nsn-history-empty' }, ['暂无历史颜色']);
                panel.appendChild(emptyMsg);
            } else {
                const grid = createElement('div', { className: 'nsn-color-grid' });
                history.forEach(color => {
                    const colorBlock = createElement('div', {
                        className: 'nsn-color-block',
                        style: { backgroundColor: color },
                        title: color
                    });
                    colorBlock.addEventListener('mousedown', (e) => {
                        e.preventDefault();
                        e.stopPropagation();
                        saveSelection();
                    });
                    colorBlock.addEventListener('click', (e) => {
                        e.preventDefault();
                        e.stopPropagation();
                        restoreSelection();
                        if (type === 'font') {
                            fontColorPicker.value = color;
                            cmd('foreColor', color);
                        } else {
                            bgColorPicker.value = color;
                            cmd('backColor', color);
                        }
                        hideAllHistoryPanels();
                    });
                    grid.appendChild(colorBlock);
                });
                panel.appendChild(grid);
            }
        }
        
        function toggleHistoryPanel(panel, btn) {
            const isVisible = panel.classList.contains('show');