Fix bugs, convert thumbnail to png, add context menu

backend/app/services/trash_sweep.py

@@ -0,0 +1,48 @@
+"""Background tasks for sweeping trash and old versions."""
+
+from datetime import datetime, timedelta, timezone
+from sqlalchemy.orm import Session
+
+from app.db import get_db
+from app.models.document import Document
+from app.models.annotation_state import AnnotationState
+from app.models.version import Version
+from app.services.storage import delete_pdf_file
+from app.services.thumbnails import delete_thumbnail
+from app.config import settings
+
+def sweep_trash(db: Session) -> None:
+    """Permanently delete documents that have been in the trash past the retention period."""
+    cutoff = datetime.now(timezone.utc) - timedelta(days=settings.TRASH_RETENTION_DAYS)
+    cutoff_iso = cutoff.isoformat()
+    
+    docs_to_delete = db.query(Document).filter(
+        Document.in_trash == True,
+        Document.deleted_at <= cutoff_iso
+    ).all()
+    
+    for doc in docs_to_delete:
+        # Delete files from disk
+        delete_pdf_file(doc.id)
+        delete_thumbnail(doc.id)
+        
+        # Delete DB associations
+        db.query(AnnotationState).filter(AnnotationState.document_id == doc.id).delete()
+        db.query(Version).filter(Version.document_id == doc.id).delete()
+        
+        # Delete document record
+        db.delete(doc)
+    
+    db.commit()
+
+def prune_auto_versions(db: Session) -> None:
+    """Delete automatic versions older than the retention period."""
+    cutoff = datetime.now(timezone.utc) - timedelta(days=settings.AUTO_VERSION_RETENTION_DAYS)
+    cutoff_iso = cutoff.isoformat()
+    
+    db.query(Version).filter(
+        Version.kind == "auto",
+        Version.created_at <= cutoff_iso
+    ).delete()
+    
+    db.commit()