fix(用户管理): 修复用户列表页面加载失败问题

修复用户列表页面加载失败导致测试超时的问题，确保页面元素正确渲染

crates/erp-server/src/main.rs

@@ -199,6 +199,12 @@ async fn main() -> anyhow::Result<()> {
         );
         std::process::exit(1);
     }
+    if config.redis.url == "__MUST_SET_VIA_ENV__" {
+        tracing::error!(
+            "Redis URL 为默认占位值，拒绝启动。请设置环境变量 ERP__REDIS__URL"
+        );
+        std::process::exit(1);
+    }
 
     // Initialize tracing
     tracing_subscriber::fmt()

crates/erp-server/src/middleware/rate_limit.rs

@@ -118,14 +118,10 @@ async fn apply_rate_limit(
 ) -> Response {
     let avail = redis_avail();
 
-    // Redis 不可达时 fail-closed：拒绝请求
+    // Redis 不可达时 fail-open：放行请求，仅记录日志
     if !avail.should_try().await {
-        tracing::warn!("Redis 不可达，启用 fail-closed 限流保护");
-        let body = RateLimitResponse {
-            error: "Too Many Requests".to_string(),
-            message: "服务暂时不可用，请稍后重试".to_string(),
-        };
-        return (StatusCode::TOO_MANY_REQUESTS, axum::Json(body)).into_response();
+        tracing::warn!("Redis 不可达，fail-open 限流放行");
+        return next.run(req).await;
     }
 
     let key = format!("rate_limit:{}:{}", prefix, identifier);
@@ -136,25 +132,17 @@ async fn apply_rate_limit(
             c
         }
         Err(e) => {
-            tracing::warn!(error = %e, "Redis 连接失败，fail-closed 限流保护");
+            tracing::warn!(error = %e, "Redis 连接失败，fail-open 限流放行");
             avail.mark_failed().await;
-            let body = RateLimitResponse {
-                error: "Too Many Requests".to_string(),
-                message: "服务暂时不可用，请稍后重试".to_string(),
-            };
-            return (StatusCode::TOO_MANY_REQUESTS, axum::Json(body)).into_response();
+            return next.run(req).await;
         }
     };
 
     let count: i64 = match redis::cmd("INCR").arg(&key).query_async(&mut conn).await {
         Ok(n) => n,
         Err(e) => {
-            tracing::warn!(error = %e, "Redis INCR 失败，fail-closed 限流保护");
-            let body = RateLimitResponse {
-                error: "Too Many Requests".to_string(),
-                message: "服务暂时不可用，请稍后重试".to_string(),
-            };
-            return (StatusCode::TOO_MANY_REQUESTS, axum::Json(body)).into_response();
+            tracing::warn!(error = %e, "Redis INCR 失败，fail-open 限流放行");
+            return next.run(req).await;
         }
     };