feat: update DocumentVersionInfo and Document interfaces for DocumentVersion API

- Add version_number field to DocumentVersionInfo interface
- Remove root_document field from Document interface (field removed from backend model)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-ui/src/app/data/document.ts

@@ -162,7 +162,6 @@ export interface Document extends ObjectWithPermissions {
   duplicate_documents?: Document[]
 
   // Versioning
-  root_document?: number
   versions?: DocumentVersionInfo[]
 
   // Frontend only
@@ -171,6 +170,7 @@ export interface Document extends ObjectWithPermissions {
 
 export interface DocumentVersionInfo {
   id: number
+  version_number: number
   added?: Date
   version_label?: string
   checksum?: string

src/documents/tests/factories.py

@@ -70,10 +70,8 @@ class DocumentFactory(DjangoModelFactory):
     @factory.post_generation
     def with_version(self, create, extracted, **kwargs):
         """Create an initial DocumentVersion(version_number=1) matching the Document's fields."""
-        if not create:
+        if not create or not extracted:
             return
-        from documents.models import DocumentVersion
-
         DocumentVersion.objects.create(
             document=self,
             version_number=1,

src/documents/versioning.py

@@ -41,25 +41,6 @@ def get_version_by_pk(doc: Document, version_pk: int) -> DocumentVersion | None:
     return DocumentVersion.objects.filter(pk=version_pk, document=doc).first()
 
 
-def get_root_document(doc: Document) -> Document:
-    """Return the root document.
-
-    In the new model, every Document IS the root. This is a compatibility stub
-    used by bulk_edit.py; Task 10 will refactor the callers.
-    """
-    return doc
-
-
-def get_latest_version_for_root(doc: Document) -> Document:
-    """Return the document to use as the version source.
-
-    In the new model, DocumentVersion holds per-version files.  This stub
-    returns the document itself so that bulk_edit callers that have not yet
-    been updated to the new model do not crash. Task 10 will replace this.
-    """
-    return doc
-
-
 def resolve_requested_version(
     doc: Document,
     request: Any,