fix: resolve test import errors and module collision in assets_test

Extract helper functions from conftest.py to a dedicated helpers.py module
to fix import resolution issues when pytest processes subdirectories.
Rename test_tags.py to test_tags_api.py to avoid module name collision
with queries/test_tags.py.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests-unit/assets_test/conftest.py

@@ -261,11 +261,7 @@ def autoclean_unit_test_assets(http: requests.Session, api_base: str):
                 http.delete(f"{api_base}/api/assets/{aid}", timeout=30)
 
 
-def trigger_sync_seed_assets(session: requests.Session, base_url: str) -> None:
-    """Force a fast sync/seed pass by calling the seed endpoint."""
-    session.post(base_url + "/api/assets/seed", json={"roots": ["models", "input", "output"]}, timeout=30)
-    time.sleep(0.2)
+# Re-export helpers for backwards compatibility with any external imports
+from helpers import trigger_sync_seed_assets, get_asset_filename
 
-
-def get_asset_filename(asset_hash: str, extension: str) -> str:
-    return asset_hash.removeprefix("blake3:") + extension
+__all__ = ["trigger_sync_seed_assets", "get_asset_filename"]

tests-unit/assets_test/helpers.py

@@ -0,0 +1,14 @@
+"""Helper functions for assets integration tests."""
+import time
+
+import requests
+
+
+def trigger_sync_seed_assets(session: requests.Session, base_url: str) -> None:
+    """Force a fast sync/seed pass by calling the seed endpoint."""
+    session.post(base_url + "/api/assets/seed", json={"roots": ["models", "input", "output"]}, timeout=30)
+    time.sleep(0.2)
+
+
+def get_asset_filename(asset_hash: str, extension: str) -> str:
+    return asset_hash.removeprefix("blake3:") + extension

tests-unit/assets_test/test_assets_missing_sync.py

@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pytest
 import requests
-from conftest import get_asset_filename, trigger_sync_seed_assets
+from helpers import get_asset_filename, trigger_sync_seed_assets
 
 
 

tests-unit/assets_test/test_crud.py

@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pytest
 import requests
-from conftest import get_asset_filename, trigger_sync_seed_assets
+from helpers import get_asset_filename, trigger_sync_seed_assets
 
 
 def test_create_from_hash_success(

tests-unit/assets_test/test_downloads.py

@@ -6,7 +6,7 @@ from typing import Optional
 
 import pytest
 import requests
-from conftest import get_asset_filename, trigger_sync_seed_assets
+from helpers import get_asset_filename, trigger_sync_seed_assets
 
 
 def test_download_attachment_and_inline(http: requests.Session, api_base: str, seeded_asset: dict):

tests-unit/assets_test/test_prune_orphaned_assets.py

@@ -3,7 +3,7 @@ from pathlib import Path
 
 import pytest
 import requests
-from conftest import get_asset_filename, trigger_sync_seed_assets
+from helpers import get_asset_filename, trigger_sync_seed_assets
 
 
 @pytest.fixture