fix: 关闭 “启用鼠标点击特效” 时无法显示常驻拖尾

[ABA2396]

No description provided.

[Copilot]

Pull request overview

该 PR 旨在修复“关闭「启用鼠标点击特效」后，仍应能显示「常驻拖尾」但实际无法显示”的问题，并同步优化控制面板在关闭点击特效开关时的选项显示逻辑，使点击特效与拖尾效果的开关语义更清晰。

Changes:

• 将点击特效与拖尾渲染的开关判断拆分：点击仅受点击特效开关影响，拖尾受“点击特效或常驻拖尾”任一开关影响。
• 调整 CanRenderEffects()：仅保留渲染环境条件检查，将业务开关判断下放到调用点。
• 控制面板在主开关关闭时隐藏点击特效相关选项面板，并在加载设置时同步刷新可见性。

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/OverlayManager.cs	拆分点击/拖尾的开关判断，并调整渲染前置条件检查逻辑以支持常驻拖尾独立生效。
src/ConfigManager.cs	新增语义化的派生开关属性，区分点击特效激活与拖尾激活状态。
src/ControlPanelWindow.xaml.cs	加载设置时及主开关切换时，动态更新点击特效选项面板可见性。
src/ControlPanelWindow.xaml	为主开关添加 Checked/Unchecked 事件，并为点击特效选项面板命名以便代码控制可见性。

Comments suppressed due to low confidence (1)

src/OverlayManager.cs:537

• OnMouseMoveExt still blocks rendering when the cursor is hidden and _isPrimaryPointerDown is false. With the new IsTrailEffectActive gate, this means “常驻拖尾” can still fail to render in cursor-hidden environments (e.g., touchscreen mode / apps that hide the cursor), because _isPrimaryPointerDown may never become true when click effects are disabled. Consider allowing move rendering when the always-trail switch is enabled, regardless of _isPrimaryPointerDown.

            if (!ConfigManager.IsTrailEffectActive) return;
            if (!CanRenderEffects()) return;

            bool cursorVisible = CursorIsVisible();
            if (!cursorVisible && !_isPrimaryPointerDown) return;

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