feat(ECR-012–016): 合规、题库、时辰刷新、头像、MBTI OEJTS 与埋点

落地输入合规、探索题库、报告日/时辰刷新、账号头像、OEJTS 量表，并补齐 H5 埋点与 Admin 漏斗；同步 ESS 工件、切至自建 Git、清理 GitHub Actions。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/internal/service/home/shichen.go

@@ -0,0 +1,32 @@
+package home
+
+import (
+	"time"
+)
+
+var shichenNames = [12]string{"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"}
+
+// ShichenWindow is the current Chinese double-hour window.
+type ShichenWindow struct {
+	Index int
+	Name  string
+	Start time.Time
+	End   time.Time
+}
+
+// CurrentShichen returns the 十二时辰 window for now (子时 23:00–01:00 …).
+func CurrentShichen(now time.Time) ShichenWindow {
+	h := now.Hour()
+	idx := ((h + 1) % 24) / 2
+	startHour := (idx*2 + 23) % 24
+	start := time.Date(now.Year(), now.Month(), now.Day(), startHour, 0, 0, 0, now.Location())
+	if start.After(now) {
+		start = start.Add(-24 * time.Hour)
+	}
+	return ShichenWindow{
+		Index: idx,
+		Name:  shichenNames[idx],
+		Start: start,
+		End:   start.Add(2 * time.Hour),
+	}
+}