fix: fix a critical issue with logging files rotation

Author: notwindstone

docs/README.md

@@ -1,3 +1,6 @@
+- plugin/extension packs
+- a development option to enable native context menu alongside the default one
+
 <div align="center">
 
 <a target="_blank" href="https://bluearchive.wiki/wiki/Arisu">

src-tauri/src/launcher.rs

@@ -45,8 +45,16 @@ pub fn prepare_log_file(logs_dir: &Path, app_name: &str) -> std::io::Result<()>
             Some(name) => name,
             None => continue,
         };
+        // Count the file name length without its extension
+        let cleaned_filename_length = filename.len() - log_extension_length;
+
+        // Prefix length should be smaller than the cleaned file name length
+        if prefix_length >= cleaned_filename_length {
+          continue;
+        }
+
         // Extract the number from the current log file
-        let extracted_number = &filename[prefix_length..filename.len() - log_extension_length];
+        let extracted_number = &filename[prefix_length..cleaned_filename_length];
         // Parse the extracted number
         let num = match extracted_number.parse::<usize>() {
             Ok(n) => n,