fix(distro): handle single-quoted IDs, add mint, run cargo fmt

- parse_id now strips both double and single quotes per os-release spec
- distro_family debian arm includes "mint" (legacy Linux Mint ID)
- Add tests: single-quoted ID round-trip, mint family classification

src-tauri/src/distro.rs

@@ -7,9 +7,7 @@ pub fn detect() -> String {
 pub fn distro_family(id: &str) -> &'static str {
     match id {
         "arch" | "cachyos" | "endeavouros" | "manjaro" | "garuda" => "arch",
-        "debian" | "ubuntu" | "linuxmint" | "pop" | "elementary" | "kali" => {
-            "debian"
-        }
+        "debian" | "ubuntu" | "linuxmint" | "mint" | "pop" | "elementary" | "kali" => "debian",
         "fedora" | "rhel" | "centos" | "rocky" | "alma" => "fedora",
         "opensuse" | "opensuse-tumbleweed" | "opensuse-leap" => "opensuse",
         _ => "unknown",
@@ -22,7 +20,13 @@ fn parse_id(content: &str) -> String {
         .find_map(|line| {
             let (key, val) = line.split_once('=')?;
             if key.trim() == "ID" {
-                Some(val.trim().trim_matches('"').to_lowercase())
+                let raw = val.trim();
+                let unquoted = raw
+                    .strip_prefix('"')
+                    .and_then(|s| s.strip_suffix('"'))
+                    .or_else(|| raw.strip_prefix('\'').and_then(|s| s.strip_suffix('\'')))
+                    .unwrap_or(raw);
+                Some(unquoted.to_lowercase())
             } else {
                 None
             }
@@ -70,4 +74,15 @@ mod tests {
     fn distro_family_unknown() {
         assert_eq!(distro_family("slackware"), "unknown");
     }
+
+    #[test]
+    fn parses_single_quoted_id() {
+        let content = "ID='arch'\nPRETTY_NAME='Arch Linux'\n";
+        assert_eq!(parse_id(content), "arch");
+    }
+
+    #[test]
+    fn distro_family_mint_legacy() {
+        assert_eq!(distro_family("mint"), "debian");
+    }
 }