chore: apply cargo fmt across workspace and update docs

- Run cargo fmt on all Rust crates for consistent formatting
- Update CLAUDE.md with WASM plugin commands and dev.ps1 instructions
- Update wiki: add WASM plugin architecture, rewrite dev environment docs
- Minor frontend cleanup (unused imports)

crates/erp-core/src/error.rs

@@ -1,6 +1,6 @@
+use axum::Json;
 use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
-use axum::Json;
 use serde::Serialize;
 
 /// 统一错误响应格式