autocal: 序列页阵列预览工具、2D 图点可见度，标签顺序与送到标定页

- 标签顺序：几何与安装 放到 测试序列 之前
- 序列点增加可选 uv_px（向后兼容），点表新增 U/V 列；加入所选点、删除所选、
  送到标定页（按 U/V 经同一套求解加入标定队列并切换页面）
- 已选点结果改显示在选点区状态行，不再写入全局顶部状态条
- 序列页左上区改紧凑：名称与备注同一行，分“阵列”“运动参数”两页；
  运动参数每行三组，输入框改用 compactField
- 新增阵列工具（array_plan.py、ui/array_tool.py）：UV 规则网格（可蛇形遍历）与
  阶段预设，逐点检查是否在曲面内、是否留有边距，候选点实时预览在 2D 图上，
  只有可用点才能加入，已在序列里的点不重复加入
- 2D 平面图：标记改为缩放后再绘制并加深色描边，修复缩小后点不清；
  底图可选 原图/灰度/变暗/仅轮廓，点色可选 黄/白/青/橙/灰（默认灰度+黄，写入偏好）；
  序列点带编号并连线显示遍历顺序，选中行高亮
- 新增测试 test_sequence_uv、test_sequence_to_capture、test_array_plan、test_array_tool

apps/autocal/docs/sequence-format.md

@@ -101,6 +101,7 @@ to another bench's number.
 | `id` | 1-based, stable within the file; used for run progress and resume |
 | `target_mm` | where the axes go — required, with all three of `x`, `y`, `z` |
 | `sensor_mm` | where that point lands on the sensor; optional but written |
+| `uv_px` | `{u, v}`: the point's place on the flat map, in pixels from the map origin; optional (added without a version change, older files simply lack it). The capture page takes its points by U/V, so a point with `uv_px` can be sent there directly |
 | `clearance_mm` | the standoff for this point |
 | `enabled` | false = designed but deliberately skipped |
 | `note` | free text |