chore(dev): update environment and tooling configuration

.envrc

@@ -2,11 +2,18 @@
 
 export DIRENV_WARN_TIMEOUT=20s
 
-eval "$(devenv direnvrc)"
+# 尝试加载 devenv 的 direnv 配置
+if command -v devenv >/dev/null 2>&1; then
+    # 如果存在 devenv
+    eval "$(devenv direnvrc)"
 
-# `use devenv` supports the same options as the `devenv shell` command.
-#
-# To silence all output, use `--quiet`.
-#
-# Example usage: use devenv --quiet --impure --option services.postgres.enable:bool true
-use devenv
+    # `use devenv` 支持和 `devenv shell` 相同的选项
+    # 示例：use devenv --quiet --impure --option services.postgres.enable:bool true
+    use devenv
+else
+    # 如果不存在 devenv，则加载自己的 fallback 配置
+    echo "devenv not found, loading fallback configuration..."
+
+    export UV_PROJECT_ENVIRONMENT="/workspace/envs/mini-nav"
+    export MY_DEV_ENV=1
+fi