refactor: replace AtomicI64 with Instant for app start time tracking and simplify uptime calculation

src-tauri/Cargo.toml

@@ -245,4 +245,4 @@ iter_on_empty_collections = "deny"
 # fallible_impl_from = "deny" // 过于激进，暂时不开启
 equatable_if_let = "deny"
 collection_is_never_read = "deny"
-branches_sharing_code = "deny"
+branches_sharing_code = "deny"

src-tauri/src/cmd/system.rs

@@ -6,22 +6,11 @@ use crate::{
     utils::logging::Type,
 };
 use once_cell::sync::Lazy;
-use std::{
-    sync::atomic::{AtomicI64, Ordering},
-    time::{SystemTime, UNIX_EPOCH},
-};
 use tauri_plugin_clipboard_manager::ClipboardExt;
+use tokio::time::Instant;
 
 // 存储应用启动时间的全局变量
-static APP_START_TIME: Lazy<AtomicI64> = Lazy::new(|| {
-    // 获取当前系统时间，转换为毫秒级时间戳
-    let now = SystemTime::now()
-        .duration_since(UNIX_EPOCH)
-        .unwrap_or_default()
-        .as_millis() as i64;
-
-    AtomicI64::new(now)
-});
+static APP_START_TIME: Lazy<Instant> = Lazy::new(Instant::now);
 
 #[tauri::command]
 pub async fn export_diagnostic_info() -> CmdResult<()> {
@@ -51,14 +40,8 @@ pub async fn get_running_mode() -> Result<String, String> {
 
 /// 获取应用的运行时间（毫秒）
 #[tauri::command]
-pub fn get_app_uptime() -> CmdResult<i64> {
-    let start_time = APP_START_TIME.load(Ordering::Relaxed);
-    let now = SystemTime::now()
-        .duration_since(UNIX_EPOCH)
-        .unwrap_or_default()
-        .as_millis() as i64;
-
-    Ok(now - start_time)
+pub fn get_app_uptime() -> CmdResult<u128> {
+    Ok(APP_START_TIME.elapsed().as_millis())
 }
 
 /// 检查应用是否以管理员身份运行