fix: 同步 PI_CODING_AGENT_DIR 并更新模型列表

- build.sh 导出 PI_CODING_AGENT_DIR 以对齐 pi-mcp-adapter 配置路径
- 更新 models.generated.ts
- 移除 bmi-calculator.html 示例文件

build.sh

@@ -5,6 +5,9 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PI_CLI_DIST="$SCRIPT_DIR/packages/coding-agent/dist/cli.js"
 
 export SPROUTCLAW_CODING_AGENT_DIR="${SPROUTCLAW_CODING_AGENT_DIR:-$SCRIPT_DIR/.sproutclaw/agent}"
+# Align pi-mcp-adapter (and other third-party packages that only read PI_CODING_AGENT_DIR)
+# with SproutClaw's agent dir, so MCP configs in .sproutclaw/agent/mcp.json are loaded.
+export PI_CODING_AGENT_DIR="$SPROUTCLAW_CODING_AGENT_DIR"
 
 NO_ENV=false
 ARGS=()