fix: 日志输出从文件改为 stdout（journald 可见），紧凑格式，去掉 tracing-appender

Cargo.lock

@@ -544,15 +544,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "crossbeam-channel"
-version = "0.5.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
-dependencies = [
- "crossbeam-utils",
-]
-
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.12"
@@ -2358,7 +2349,6 @@ dependencies = [
  "sqlx",
  "tokio",
  "tracing",
- "tracing-appender",
  "tracing-subscriber",
  "uuid",
 ]
@@ -3304,18 +3294,6 @@ dependencies = [
  "tracing-core",
 ]
 
-[[package]]
-name = "tracing-appender"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "786d480bce6247ab75f005b14ae1624ad978d3029d9113f0a22fa1ac773faeaf"
-dependencies = [
- "crossbeam-channel",
- "thiserror",
- "time",
- "tracing-subscriber",
-]
-
 [[package]]
 name = "tracing-attributes"
 version = "0.1.30"

Cargo.toml

@@ -9,7 +9,6 @@ chrono = {version = "0.4.41", features=["serde"]}
 dotenvy = "0.15.7"
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
-tracing-appender = "0.2"
 sentry = "0.48"
 sentry-actix = "0.48"
 sentry-tracing = "0.48"

src/main.rs

@@ -154,7 +154,7 @@ async fn main() -> std::io::Result<()> {
     // Sentry 初始化（仅在 SENTRY_DSN 环境变量已设置时启用）
     let _sentry_guard = if let Ok(dsn) = std::env::var("SENTRY_DSN") {
         if !dsn.is_empty() {
-            eprintln!("[SENTRY] Sentry 已初始化 (DSN: {})", dsn);
+            info!("Sentry 已初始化");
             Some(sentry::init((
                 dsn,
                 sentry::ClientOptions {
@@ -167,30 +167,14 @@ async fn main() -> std::io::Result<()> {
                 },
             )))
         } else {
-            eprintln!("[SENTRY] SENTRY_DSN 为空，跳过 Sentry 初始化");
+            info!("SENTRY_DSN 为空，跳过 Sentry 初始化");
             None
         }
     } else {
-        eprintln!("[SENTRY] 未设置 SENTRY_DSN，跳过 Sentry 初始化");
+        info!("未设置 SENTRY_DSN，跳过 Sentry 初始化");
         None
     };
 
-    // 初始化文件日志（JSON 格式，带轮转）
-    let log_dir = std::path::Path::new("./logs");
-    std::fs::create_dir_all(log_dir).ok(); // 确保日志目录存在
-
-    let file_appender = tracing_appender::rolling::Builder::new()
-        .rotation(tracing_appender::rolling::Rotation::DAILY)
-        .filename_prefix("rust-backend")
-        .filename_suffix("log")
-        .build(log_dir)
-        .expect("无法创建日志文件");
-
-    let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
-
-    // 保持文件 guard 存活（使用 Box 泄漏）
-    std::mem::forget(_guard);
-
     use std::str::FromStr;
     let default_directive = tracing_subscriber::filter::Directive::from_str("info").unwrap();
     
@@ -213,14 +197,14 @@ async fn main() -> std::io::Result<()> {
                 )
         )
         .with_target(true)
-        .with_thread_ids(false) // 生产环境可开启
+        .with_thread_ids(false)
         .with_file(true)
         .with_line_number(true)
-        .with_writer(non_blocking)
-        .with_ansi(false) // 文件中不使用 ANSI 颜色
-        .json() // JSON 格式便于 ELK 解析
+        .with_ansi(true)
+        .compact()
         .init();
-    info!("日志系统初始化成功，JSON格式，输出到 ./logs/");
+    info!("日志系统初始化成功，输出到 systemd journal (journalctl)");
+    info!("日志级别: {}", app_config.rust_log);
 
     let app_state = match AppState::load() {
         Ok(state) => state,