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)

wiki/erp-core.md

@@ -49,6 +49,7 @@
 - **[[erp-message]]** — 实现 `ErpModule` trait，订阅通知事件
 - **[[erp-config]]** — 实现 `ErpModule` trait
 - **[[database]]** — 迁移表结构必须与 `BaseFields` 对齐
+- **[[wasm-plugin]]** — WASM 插件通过 Host Bridge 桥接 EventBus
 
 ## 关键文件