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

moon/apsis_test.go

@@ -15,7 +15,7 @@ func TestApsisWrappersMatchBasic(t *testing.T) {
 		t.Fatalf("perigee count mismatch: got %d want %d", len(perigeesWrapped), len(perigees))
 	}
 	for i, event := range perigees {
-		wantTime := basic.JDE2DateByZone(event.JDE, time.UTC, false)
+		wantTime := basic.JD2DateByZone(event.JD, time.UTC, false)
 		if !perigeesWrapped[i].Time.Equal(wantTime) {
 			t.Fatalf("perigee #%d time mismatch: got %s want %s", i+1, perigeesWrapped[i].Time.Format(time.RFC3339Nano), wantTime.Format(time.RFC3339Nano))
 		}
@@ -30,7 +30,7 @@ func TestApsisWrappersMatchBasic(t *testing.T) {
 		t.Fatalf("apogee count mismatch: got %d want %d", len(apogeesWrapped), len(apogees))
 	}
 	for i, event := range apogees {
-		wantTime := basic.JDE2DateByZone(event.JDE, time.UTC, false)
+		wantTime := basic.JD2DateByZone(event.JD, time.UTC, false)
 		if !apogeesWrapped[i].Time.Equal(wantTime) {
 			t.Fatalf("apogee #%d time mismatch: got %s want %s", i+1, apogeesWrapped[i].Time.Format(time.RFC3339Nano), wantTime.Format(time.RFC3339Nano))
 		}