fix(stats): subtract lifetime totals incrementally on delete (#196)

src/core/services/immersion-tracker/delete-maintenance.ts

@@ -1,6 +1,5 @@
 import { Database } from './sqlite';
 import { applyPragmas } from './storage';
-import { deleteAnime, deleteSession, deleteSessions, deleteVideo } from './query-maintenance';
 import {
   deleteMaintenanceBatch,
   type DeleteMaintenanceOperation,
@@ -12,35 +11,11 @@ export type DeleteMaintenanceTask =
   | DeleteMaintenanceOperation
   | { kind: 'batch'; tasks: DeleteMaintenanceOperation[] };
 
-function executeDeleteMaintenanceOperation(
-  db: InstanceType<typeof Database>,
-  task: DeleteMaintenanceOperation,
-): void {
-  switch (task.kind) {
-    case 'session':
-      deleteSession(db, task.sessionId);
-      return;
-    case 'sessions':
-      deleteSessions(db, task.sessionIds);
-      return;
-    case 'video':
-      deleteVideo(db, task.videoId);
-      return;
-    case 'anime':
-      deleteAnime(db, task.animeId);
-      return;
-  }
-}
-
 export function executeDeleteMaintenanceTask(dbPath: string, task: DeleteMaintenanceTask): void {
   const db = new Database(dbPath);
   try {
     applyPragmas(db);
-    if (task.kind === 'batch') {
-      deleteMaintenanceBatch(db, task.tasks);
-      return;
-    }
-    executeDeleteMaintenanceOperation(db, task);
+    deleteMaintenanceBatch(db, task.kind === 'batch' ? task.tasks : [task]);
   } finally {
     db.close();
   }