fix(wol): clippy + cfg-gate the Windows client module — main compiles again

The Wake-on-LAN batch landed with lints that fail `clippy -D warnings`
(doc continuation, char-array split, io::Error::other, redundant closure)
and an ungated `mod wol;` in the Windows client, which pulls windows-only
crates into the non-Windows stub build.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

clients/android/native/src/wol.rs

@@ -23,7 +23,7 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeWakeOnLan<'
     };
     let last_ip: String = env
         .get_string(&last_ip)
-        .map(|s| Into::<String>::into(s))
+        .map(Into::<String>::into)
         .unwrap_or_default();
     let macs: Vec<[u8; 6]> = macs_csv
         .split(',')