feat: P1 合盘/星座/问答与测测完整设计包及模拟器取证工具

落地 synastry/star/ask API 与 H5 页面，补齐 cece-frontend-re complete-design 证据文档，并加入 Android 模拟器截图抓取脚本。

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

apps/api/internal/rhythm/engine_test.go

@@ -0,0 +1,21 @@
+package rhythm
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestBuild(t *testing.T) {
+	out := Build(time.Date(1992, 6, 8, 0, 0, 0, 0, time.UTC), "我")
+	if out.Summary["primary_element"] == nil {
+		t.Fatal("missing element")
+	}
+	raw, _ := json.Marshal(out)
+	for _, bad := range []string{"运势", "吉凶", "算命", "疗效", "治病"} {
+		if strings.Contains(string(raw), bad) {
+			t.Fatalf("forbidden %q", bad)
+		}
+	}
+}