feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/stats/README.md

@@ -0,0 +1,16 @@
+# OpenCode Stats
+
+Stats is a separate site from the console. Runtime, database, and domain services live in `core`; the SolidStart website lives in `app`; deployable Lambda entrypoints live in `function`.
+
+## Packages
+
+- `app`: SolidStart frontend/site.
+- `core`: Effect services, app config, Drizzle schema/migrations, and stats domains.
+- `function`: Lambda handlers that call into `core` services.
+
+## Commands
+
+- `bun run dev:stats` from the repo root starts the SolidStart app.
+- `bun run --cwd packages/stats/app typecheck` typechecks the site.
+- `bun run --cwd packages/stats/core typecheck` typechecks the Effect/database package.
+- `bun run --cwd packages/stats/function typecheck` typechecks Lambda entrypoints.