feat(admin): 运营后台（登录/查看/审核编辑/补全）+ 写入API + 审计留痕

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

api/internal/adminstore/quality_test.go

@@ -0,0 +1,30 @@
+package adminstore
+
+import "testing"
+
+func TestAgreementFromSources(t *testing.T) {
+	cases := map[int]float64{0: 0.5, 1: 0.5, 2: 0.8, 3: 1.0, 9: 1.0}
+	for n, want := range cases {
+		if got := agreementFromSources(n); got != want {
+			t.Errorf("agreementFromSources(%d) = %v, want %v", n, got, want)
+		}
+	}
+}
+
+func TestFreshnessFromAge(t *testing.T) {
+	mk := func(d float64) *float64 { return &d }
+	if got := freshnessFromAge(nil); got != 0.5 {
+		t.Errorf("nil age = %v, want 0.5", got)
+	}
+	cases := []struct {
+		days float64
+		want float64
+	}{
+		{10, 1.0}, {30, 1.0}, {100, 0.8}, {300, 0.6}, {500, 0.4}, {1000, 0.2},
+	}
+	for _, c := range cases {
+		if got := freshnessFromAge(mk(c.days)); got != c.want {
+			t.Errorf("freshnessFromAge(%v) = %v, want %v", c.days, got, c.want)
+		}
+	}
+}