feat: enhance safety filters for shell commands by normalizing ANSI-C quoting

src/model/editlog.rs

@@ -63,8 +63,12 @@ impl EditLog {
     /// any filesystem operation fails.
     pub fn append(&mut self, entry: EditLogEntry) -> std::io::Result<()> {
         let line = serde_json::to_string(&entry)? + "\n";
-        let parent = self.path.parent().unwrap();
-        std::fs::create_dir_all(parent)?;
+        // Ensure parent directory exists; fall back to the current
+        // directory if path has no parent (should not happen in practice
+        // since EditLog::new always joins to a session dir).
+        if let Some(parent) = self.path.parent() {
+            std::fs::create_dir_all(parent)?;
+        }
         let mut file = std::fs::OpenOptions::new()
             .create(true)
             .append(true)