fix: 修复 macOS 专属 Clippy 错误

- service.rs: macOS 平台两处 manual_strip，改用 strip_prefix
- utils.rs: openclaw_command 在 macOS 未被调用，加 #[allow(dead_code)]，函数体改用全路径 std::process::Command::new 避免 unused_imports

src-tauri/src/commands/service.rs

@@ -87,14 +87,13 @@ mod platform {
                 continue;
             }
             let trimmed = line.trim();
-            if trimmed.starts_with("pid = ") {
-                if let Ok(p) = trimmed["pid = ".len()..].trim().parse::<u32>() {
+            if let Some(rest) = trimmed.strip_prefix("pid = ") {
+                if let Ok(p) = rest.trim().parse::<u32>() {
                     pid = Some(p);
                 }
             }
-            if trimmed.starts_with("state = ") {
-                let state = trimmed["state = ".len()..].trim();
-                running = state == "running";
+            if let Some(rest) = trimmed.strip_prefix("state = ") {
+                running = rest.trim() == "running";
             }
         }
 

src-tauri/src/utils.rs

@@ -1,21 +1,21 @@
 #[cfg(target_os = "windows")]
 use std::os::windows::process::CommandExt;
-use std::process::Command;
 
 /// 跨平台获取 openclaw 命令的方法（同步版本）
 /// 在 Windows 上使用 `cmd /c openclaw` 以兼容全局 npm 路径下的 `.cmd` 脚本
-pub fn openclaw_command() -> Command {
+#[allow(dead_code)]
+pub fn openclaw_command() -> std::process::Command {
     #[cfg(target_os = "windows")]
     {
         const CREATE_NO_WINDOW: u32 = 0x08000000;
-        let mut cmd = Command::new("cmd");
+        let mut cmd = std::process::Command::new("cmd");
         cmd.arg("/c").arg("openclaw");
         cmd.creation_flags(CREATE_NO_WINDOW);
         cmd
     }
     #[cfg(not(target_os = "windows"))]
     {
-        Command::new("openclaw")
+        std::process::Command::new("openclaw")
     }
 }