fix(install): awada 插件路径直接解析成绝对路径写回 openclaw.json

[bigbrother666sh]

macOS 用户 v5.6.0 装完 openclaw 校验 config 报：

missing env var "XIAOBEI_HOME" at plugins.load.paths[0]
plugin path not found: /Users/pinshikeji/${XIAOBEI_HOME}/awada

根因：config template 里 plugins.load.paths=["${XIAOBEI_HOME}/awada"] 靠运行时 env 注入。openclaw 在 CLI 上下文（daemon install / doctor / status / 裸跑 openclaw）校验 config 用的是当前 shell env，未必有 XIAOBEI_HOME → env ref 不展开 → path not found 误报。daemon 自己经 launchd wrapper（exec 前 . service-env/ai.openclaw.gateway.env）能拿到，gateway 实际跑得动；误报来自 CLI 校验。

修法（用户建议）：awada 位置 install 时已知（$WISEFLOW_ROOT/awada），place_config_template 放置/保留 config 后用 node 把 ${XIAOBEI_HOME} 直接替换成绝对路径写回。幂等，更新路线也跑（修老 config 残留 env ref）。AWK_API_KEY 是 secret 保持 ${AWK_API_KEY} env ref 不写死（写死会落盘明文 + 进 .bak + doctor 可见）。

另：install_gateway_and_env / refresh_gateway_env_only 写完 env 文件后调 load_env_vars_for_cli 把 AWK_API_KEY + XIAOBEI_HOME 加载进 install shell，让 daemon install / gateway restart / channels login 这些 CLI 调用校验 config 不再误报 missing env var。不写进用户 shell rc（secret 不落明文 rc）；用户裸跑 openclaw 仍可能 warn，属 env-ref 固有、无实际影响。

install.ps1 Place-Config 同步加路径解析。重建 v5.6.0（不 bump patch）。

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