feat: 完善时标与天象几何计算并扩展输出接口

- 新增时标、ΔT 模型、质心时间与 UT1 支持
- 改进日月食、月掩、行星事件及路径边界计算
- 完善恒星三维自行与动态距离传播
- 扩展 SVG、GeoJSON、KML 输出与底层距离换算工具
- 整理中英文手册、示例资源及回归测试

basic/outer_planet_truth_test.go

@@ -135,8 +135,8 @@ func assertOuterTruthBaselineEvent(t *testing.T, event outerTruthBaselineEvent,
 	when := parseInnerBaselineTime(t, event.VerifiedJST)
 	before := when.Add(-7 * 24 * time.Hour)
 	after := when.Add(7 * 24 * time.Hour)
-	next := JDE2DateByZone(nextFn(toUTJD(before)), when.Location(), false)
-	last := JDE2DateByZone(lastFn(toUTJD(after)), when.Location(), false)
+	next := JD2DateByZone(nextFn(toUTJD(before)), when.Location(), false)
+	last := JD2DateByZone(lastFn(toUTJD(after)), when.Location(), false)
 	tolerance := outerTruthTolerance(event)
 
 	if diff := next.Sub(when); diff < -tolerance || diff > tolerance {