refactor: simplify codebase (-209 lines)

internal/store/store.go

@@ -11,12 +11,9 @@ var db *bolt.DB
 
 func OpenDB(cfgDir string) error {
 	var err error
-
-	dbPath := path.Join(cfgDir, "tracks.db")
-	db, err = bolt.Open(dbPath, 0600, nil)
+	db, err = bolt.Open(path.Join(cfgDir, "tracks.db"), 0600, nil)
 	if err != nil {
 		return fmt.Errorf("failed to open database: %w", err)
 	}
-
 	return nil
 }