chore: make sure that there is only one app

src/core/SeriesApp.py

@@ -58,7 +58,6 @@ class DownloadStatusEventArgs:
         self.eta = eta
         self.mbper_sec = mbper_sec
 
-
 class ScanStatusEventArgs:
     """Event arguments for scan status events."""
 
@@ -92,7 +91,6 @@ class ScanStatusEventArgs:
         self.message = message
         self.error = error
 
-
 class SeriesApp:
     """
     Main application class for anime series management.
@@ -328,7 +326,7 @@ class SeriesApp:
 
             return False
 
-    async def re_scan(self) -> int:
+    async def rescan(self) -> int:
         """
         Rescan directory for missing episodes (async).