chore: seal Design Vision v1 and monorepo scaffold

Archive the differentiated YuXinGu product docs, AI engineering system,
design contract, and Go/Vue scaffold. Next execution prioritizes Cece-parity
over early innovation (see .ai/product/STRATEGY.md).

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

apps/user-h5/src/pages/DecodePage.vue

@@ -0,0 +1,32 @@
+<template>
+  <main class="page">
+    <button class="back" type="button" @click="$router.back()">← 返回</button>
+    <h1>愈心解码</h1>
+    <p class="sub" v-if="y">生日：{{ y }}-{{ m }}-{{ d }}</p>
+    <div class="card">
+      简版报告将由 Go API 生成。当前为页面骨架；完整「结论免费 / 原因付费」逻辑见 PRD。
+    </div>
+    <p class="disc">
+      本内容为文化测评与健康生活方式参考，不构成医疗建议。
+    </p>
+  </main>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue'
+import { useRoute } from 'vue-router'
+
+const route = useRoute()
+const y = computed(() => String(route.query.y || ''))
+const m = computed(() => String(route.query.m || ''))
+const d = computed(() => String(route.query.d || ''))
+</script>
+
+<style scoped>
+.page{padding:16px}
+.back{border:none;background:#fff;border-radius:10px;padding:8px 12px;margin-bottom:12px}
+h1{font-size:22px}
+.sub{color:var(--yxg-sub);margin:8px 0 14px;font-size:13px}
+.card{background:#fff;border-radius:16px;padding:18px;font-size:14px;line-height:1.7;color:#555}
+.disc{font-size:11px;color:#bbb;margin-top:16px;line-height:1.5}
+</style>