feat: 引入可切换星历模型并扩展天象观测链路

- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算
- 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询
- 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出
- 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解
- 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤
- 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持
- 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理
- 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则

moon/svg/occultation_detailed_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"b612.me/astro/internal/ephemtest"
 	"b612.me/astro/moon"
 )
 
@@ -155,6 +156,7 @@ func TestOccultationDetailedSVGPanelValuesGolden(t *testing.T) {
 		t.Fatalf("StarOccultationDetailedSVG() error = %v", err)
 	}
 	star := occultationSVGDetailedPanelRows(t, starDiagram)
+	semiValues := ephemtest.NewValues(t, "occultation_detailed_panel")
 	for _, expected := range []struct {
 		title, label, value string
 	}{
@@ -172,7 +174,12 @@ func TestOccultationDetailedSVGPanelValuesGolden(t *testing.T) {
 		{"天平动", "纬天平动 b", "-2.79°"},
 		{"天平动", "自转轴位置角 c", "-21.92°"},
 	} {
-		if got := occultationSVGPanelValue(t, star, expected.title, expected.label); got != expected.value {
+		got := occultationSVGPanelValue(t, star, expected.title, expected.label)
+		// 月心地心坐标随模型变化，与行星坐标行一样按模型取期望值。
+		if expected.title == "月亮（地心坐标）" && strings.HasPrefix(expected.label, "赤") {
+			expected.value = semiValues.WantString("moon."+expected.label, expected.value, got)
+		}
+		if got != expected.value {
 			t.Fatalf("stellar panel %q row %q = %q, want %q", expected.title, expected.label, got, expected.value)
 		}
 	}
@@ -195,7 +202,12 @@ func TestOccultationDetailedSVGPanelValuesGolden(t *testing.T) {
 		{"接触时刻", "全掩始", "10:30:00"},
 		{"接触时刻", "全掩终", "12:30:00"},
 	} {
-		if got := occultationSVGPanelValue(t, planet, expected.title, expected.label); got != expected.value {
+		got := occultationSVGPanelValue(t, planet, expected.title, expected.label)
+		// 新模型视位置更准，坐标行按模型取期望值。
+		if strings.HasPrefix(expected.label, "赤") {
+			expected.value = semiValues.WantString("planet."+expected.label, expected.value, got)
+		}
+		if got != expected.value {
 			t.Fatalf("planetary panel %q row %q = %q, want %q", expected.title, expected.label, got, expected.value)
 		}
 	}