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-workflow/src/engine/expression.rs

@@ -18,7 +18,10 @@ impl ExpressionEvaluator {
     /// 求值单个条件表达式。
     ///
     /// 表达式格式: `{left} {op} {right}` 或复合表达式 `{expr1} && {expr2}`
-    pub fn eval(expr: &str, variables: &HashMap<String, serde_json::Value>) -> WorkflowResult<bool> {
+    pub fn eval(
+        expr: &str,
+        variables: &HashMap<String, serde_json::Value>,
+    ) -> WorkflowResult<bool> {
         let expr = expr.trim();
 
         // 处理逻辑 OR
@@ -72,7 +75,10 @@ impl ExpressionEvaluator {
     }
 
     /// 求值单个比较表达式。
-    fn eval_comparison(expr: &str, variables: &HashMap<String, serde_json::Value>) -> WorkflowResult<bool> {
+    fn eval_comparison(
+        expr: &str,
+        variables: &HashMap<String, serde_json::Value>,
+    ) -> WorkflowResult<bool> {
         let operators = [">=", "<=", "!=", "==", ">", "<"];
 
         for op in &operators {