Prepare 1.2.0 classical artwork, free launcher with three-second exit and open-source licensing

docs/verification/v1.2.0/public-history-audit.json

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+{
+  "checked_commit": "906f770805fdbe8329c9d4ecd3594310e23bca6a",
+  "reachable_blobs_scanned": 356,
+  "secret_pattern_matches": [],
+  "disallowed_extensions": [],
+  "notes": [
+    "No original competitor app, metallib, model or user stock video is included.",
+    "NASA astronaut sample retains its source attribution.",
+    "Tool-generated promotional art is labeled as illustration."
+  ]
+}

docs/verification/v1.2.0/release-plan.md

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+# 1.2.0 / build 14
+
+本次只修改外层启动器、版本和宣传资源；PGFaceProcessor、PGBeautyRenderer、PGInspectorView、PGInspectorState 与 Metal 渲染算法保持 1.1.2 用户验收版本。缩略图以用户指定的生成宣传画为来源，不冒充真实渲染静帧。
+
+安装分类使用当前用户已移动后的 `Effects.localized/大鱼磨皮瘦脸/大鱼人像美化`。本地磁盘 moef 与源码基线 SHA-256 均为 e9fa97dc14323d0daa7d3d61b06a78ba4000a70ab9f5e67ebffd750d49df1e15，未覆盖任何最新手改。只为 large.png / small.png 设置 uchg。
+
+待验证：正式 Release 构建、双架构、APP 签名 / 公证 / 票据 / 安装 / 插件发现、启动器三秒退出、PKG 签名公证与有效载荷 / 缩略图锁定脚本、远端发布与文章。