Fix 29 audit findings across all severity tiers

src/core/duplicates.rs

@@ -330,9 +330,12 @@ fn build_name_group(name: &str, records: &[&AppImageRecord]) -> DuplicateGroup {
 
 /// Compare two version strings for ordering.
 fn compare_versions(a: &str, b: &str) -> std::cmp::Ordering {
-    use super::updater::version_is_newer;
+    use super::updater::{clean_version, version_is_newer};
 
-    if a == b {
+    let ca = clean_version(a);
+    let cb = clean_version(b);
+
+    if ca == cb {
         std::cmp::Ordering::Equal
     } else if version_is_newer(a, b) {
         std::cmp::Ordering::Greater