feat: improve key extraction and regex handling

- Add PatchKey method to normalize numeric keys
- Update Matcher to use PatchKey for extracted keys
- Modify ManualRuleViewModel to handle wildcard patterns correctly

SubRenamer/Matcher/Diff.cs

@@ -110,10 +110,6 @@ public static string ExtractMatchKeyByDiff(DiffResult? diff, string filename)
 
         var key = match.Groups[1].Value.Trim();
 
-        // check is pure number
-        if (key.All(char.IsDigit))
-            key = int.Parse(key).ToString(); // '01' -> '1'
-
         return key;
     }
 }

SubRenamer/Matcher/Helper.cs

@@ -18,7 +18,16 @@ public static string ExtractMatchKeyRegex(string pattern, string filename)
         }
         return "";
     }
-
+
+    public static string PatchKey(string key)
+    {
+        // check is pure number
+        if (!string.IsNullOrWhiteSpace(key) && key.All(char.IsDigit))
+            key = int.Parse(key).ToString(); // '01' -> '1'
+
+        return key;
+    }
+
     /// <summary>
     /// Merges items with the same non-empty keys by grouping them.
     /// Assuming the mapping between the video and the subtitles is one-to-many (1 to N).

SubRenamer/Matcher/Matcher.cs

@@ -84,15 +84,15 @@ private static Dictionary<string, string> CalculateFileKeys(IReadOnlyList<string
             // Extract Match keys
             foreach (var f in files)
             {
-                result[f] = Diff.ExtractMatchKeyByDiff(diff, Path.GetFileNameWithoutExtension(f));
+                result[f] = Helper.PatchKey(Diff.ExtractMatchKeyByDiff(diff, Path.GetFileNameWithoutExtension(f)));
             }
         }
         else
         {
             // 2. Regex Algorithm
             foreach (var f in files)
             {
-                result[f] = Helper.ExtractMatchKeyRegex(regexPattern, Path.GetFileName(f));
+                result[f] = Helper.PatchKey(Helper.ExtractMatchKeyRegex(regexPattern, Path.GetFileName(f)));
             }
         }
 

SubRenamer/ViewModels/ManualRuleViewModel.cs

@@ -54,7 +54,7 @@ private string GenerateRegex(string input)
     {
         var pattern = Regex.Escape(input)
             .Replace(@"\$\$", @"(.+?)")
-            .Replace(@"\*", @"(.*?)");
+            .Replace(@"\*", @".*?");
         return pattern;
     }