fix(cli): suppress dead-code warnings on Windows for Linux-only helpers

Wrap tauri_identifier, single_instance_bus_name and single_instance_object_path
with #[cfg(target_os = "linux")] since they are only reachable via D-Bus paths.
Move the argv collection into the linux-only block in lib.rs for the same reason.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/src/cli.rs

@@ -517,6 +517,7 @@ fn print_search_human(v: &Value) {
     }
 }
 
+#[cfg(target_os = "linux")]
 fn tauri_identifier() -> &'static str {
     static ID: OnceLock<String> = OnceLock::new();
     ID.get_or_init(|| {
@@ -531,10 +532,12 @@ fn tauri_identifier() -> &'static str {
     .as_str()
 }
 
+#[cfg(target_os = "linux")]
 fn single_instance_bus_name() -> String {
     format!("{}.SingleInstance", tauri_identifier())
 }
 
+#[cfg(target_os = "linux")]
 fn single_instance_object_path(dbus_name: &str) -> String {
     let mut dbus_path = dbus_name.replace('.', "/").replace('-', "_");
     if !dbus_path.starts_with('/') {

src-tauri/src/lib.rs

@@ -2253,11 +2253,10 @@ fn is_tiling_wm_cmd() -> bool {
 }
 
 pub fn run() {
-    let argv: Vec<String> = std::env::args().collect();
-
     // Linux: second `psysonic --player …` forwards over D-Bus before heavy startup.
     #[cfg(target_os = "linux")]
     {
+        let argv: Vec<String> = std::env::args().collect();
         if crate::cli::parse_cli_command(&argv).is_some() {
             match crate::cli::linux_try_forward_player_cli_secondary(&argv) {
                 Ok(crate::cli::LinuxPlayerForwardResult::Forwarded) => std::process::exit(0),