Fix test isolation: clear logging handlers and reset propagate flags

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/conftest.py

@@ -1,5 +1,6 @@
 """Pytest configuration and shared fixtures for all tests."""
 
+import logging
 from unittest.mock import Mock
 
 import pytest
@@ -149,3 +150,44 @@ def mock_series_app_download(monkeypatch):
     
     yield
 
+
+@pytest.fixture(autouse=True)
+def reset_logging_state():
+    """Reset logging handlers and propagate flags before and after each test.
+    
+    Tests that call setup_logging() or logging.config.dictConfig() may leave
+    FileHandlers and propagate=False on various loggers. This fixture clears
+    handlers and resets propagate for all relevant loggers before/after tests.
+    """
+    # All loggers that might have handlers or propagate changes from test setup
+    logger_names = (
+        "aniworld", "uvicorn", "uvicorn.access", "uvicorn.error",
+        "watchfiles.main"
+    )
+    
+    def clear_logger_state(logger_name):
+        logger = logging.getLogger(logger_name)
+        for handler in logger.handlers[:]:
+            logger.removeHandler(handler)
+            handler.close()
+        # Reset propagate to default (True) for child loggers
+        # Root logger propagate is always True by default
+        if logger_name != "root":
+            logger.propagate = True
+    
+    # Clear state BEFORE test
+    for name in logger_names:
+        clear_logger_state(name)
+    
+    yield
+    
+    # Clear state AFTER test
+    for name in logger_names:
+        clear_logger_state(name)
+    
+    # Also clear root handlers
+    root = logging.getLogger()
+    for handler in root.handlers[:]:
+        root.removeHandler(handler)
+        handler.close()
+