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/frontend.md

@@ -43,8 +43,8 @@ appStore {
 
 ### 开发服务器代理
 ```
-http://localhost:5173/api/*  →  http://localhost:3000/*    (API)
-ws://localhost:5173/ws/*     →  ws://localhost:3000/*      (WebSocket)
+http://localhost:5174/api/*  →  http://localhost:3000/*    (API)
+ws://localhost:5174/ws/*     →  ws://localhost:3000/*      (WebSocket)
 ```
 
 ### 当前状态