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-config/src/handler/theme_handler.rs

@@ -25,8 +25,7 @@ where
 {
     require_permission(&ctx, "theme.read")?;
 
-    let setting =
-        SettingService::get("theme", "tenant", &None, ctx.tenant_id, &state.db).await?;
+    let setting = SettingService::get("theme", "tenant", &None, ctx.tenant_id, &state.db).await?;
 
     let theme: ThemeResp = serde_json::from_value(setting.setting_value)
         .map_err(|e| AppError::Validation(format!("主题配置解析失败: {e}")))?;