fix: make setup_logging() resilient to journal logger failure (v0.5.1)

Replace unwrap() calls with match-based error handling that falls back
to eprintln — prevents panic when running outside a systemd session.
Consistent with moonlock's logging init pattern.

src/main.rs

@@ -92,10 +92,16 @@ fn activate(app: &gtk::Application) {
 }
 
 fn setup_logging() {
-    systemd_journal_logger::JournalLog::new()
-        .unwrap()
-        .install()
-        .unwrap();
+    match systemd_journal_logger::JournalLog::new() {
+        Ok(logger) => {
+            if let Err(e) = logger.install() {
+                eprintln!("Failed to install journal logger: {e}");
+            }
+        }
+        Err(e) => {
+            eprintln!("Failed to create journal logger: {e}");
+        }
+    }
     let level = if std::env::var("MOONGREET_DEBUG").is_ok() {
         log::LevelFilter::Debug
     } else {