RegCalc64

# RegCalc64 v0.3.1 Release Notes ## English - Added drag selection for continuous bit ranges across the 64-bit grid. - Added an editable selection readout: `[hi:lo] : Hex = Dec, Nbit`. - Drag-selected ranges automatically synchronize to Bit Field; identical ranges are reused instead of duplicated. - Added Bit Field Width and Bin synchronization. - Added a table-header × to clear all Bit Fields while keeping one blank row. - Improved selection-editor styling: borderless by default, subtle green hover/focus feedback. - Moved Help/About `?` next to the floating close control. - Improved cross-tab persistence for explicit clear operations. - Preserved the established Hex/Dec/Bin, Shift, Mask/logic and expression calculation core. ## 中文 - 新增 64-bit 区域连续位域拖选，支持跨 nibble、跨显示行。 - 新增可编辑选区结果：`[hi:lo] : Hex = Dec, Nbit`。 - 拖选完成后自动同步到 Bit Field；相同 range 自动复用，不重复添加。 - Bit Field 增加 Width 和 Bin 同步。 - Bit Field 表头增加 ×，可一键清空全部 Field，只保留一条空白行。 - 优化选区 Hex/Dec 编辑样式：默认无边框，鼠标悬浮/聚焦时使用轻绿色反馈。 - Help/About `?` 移到悬浮窗口关闭按钮旁边。 - 优化显式清空操作的跨 Tab 状态同步。 - 原有 Hex/Dec/Bin、Shift、Mask/逻辑、Expr 计算核心保持不变。