Fix/win heatmap

[debugtheworldbot]

Closes #117

变更内容

• 调整键盘热力图窗口：默认宽度加大，取消固定最大尺寸，允许用户手动缩放窗口。
• 移除热力图控件的最大缩放限制，让键盘布局按可用空间自适应放大。
• 补充热力图键位布局：增加 Print Screen、Scroll Lock、Pause，以及完整数字小键盘区域。
• 优化键名归一化：区分主键盘数字/符号与数字小键盘输入，支持 NumLock、NumEnter、Num/、Num*、Num-、Num+、Num. 等键位聚合。
• 修正日期选择弹窗背景刷，降低透明导致的可读性问题。

验证

• 未运行自动构建；本次仅更新 PR 描述。

[Copilot]

Pull request overview

This PR addresses Issue #117 on Windows by improving the keyboard heatmap’s usability and correctness: it makes the heatmap view effectively “zoomable” via window resizing, adds a distinct numpad region to the rendered keyboard layout, and adjusts the date-picker popup styling for better readability.

Changes:

• Make the heatmap window resizable (and widen default width) to allow larger heatmap rendering.
• Extend the keyboard heatmap layout to include navigation keys (PrintScreen/ScrollLock/Pause) and a full numpad cluster; remove the maximum render scale clamp so the heatmap scales with available space.
• Improve heatmap key aggregation and key-name mapping for numpad keys (including NumEnter and numpad operators).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
KeyStats.Windows/KeyStats/Views/KeyboardHeatmapWindow.xaml	Makes the window resizable and tweaks date-picker popup background for better visibility.
KeyStats.Windows/KeyStats/Views/Controls/KeyboardHeatmapControl.cs	Removes render scale cap and adds explicit layout regions for nav keys + numpad cluster.
KeyStats.Windows/KeyStats/Services/StatsManager.cs	Normalizes/aggregates numpad keys so heatmap counts map to the new numpad key IDs.
KeyStats.Windows/KeyStats/Services/InputMonitorService.cs	Passes scan code + flags into key naming to better distinguish certain keys (e.g., NumEnter).
KeyStats.Windows/KeyStats/Helpers/KeyNameMapper.cs	Adds extended-key handling for NumEnter and updates key-name API to accept scan code/flags.

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