Make blacklist override whitelist

Change filter evaluation so blacklist matches take precedence over whitelist matches. Updated evaluator logic to skip entries when blacklist and whitelist both match, adjusted related branches to reflect the new decision flow, and updated a feeds.py comment to clarify the combined decision. Also updated blacklist/whitelist templates copy to reflect the new precedence and adjusted tests to expect blacklist-wins behavior.

tests/test_main.py

@@ -283,7 +283,7 @@ def test_blacklist_preview_does_not_persist_unsaved_rules() -> None:
             reader.delete_tag(feed_url, "blacklist_title")
 
 
-def test_whitelist_preview_shows_precedence_over_blacklist() -> None:
+def test_whitelist_preview_shows_blacklist_precedence() -> None:
     reader: Reader = ensure_preview_feed_exists()
     reader.set_tag(feed_url, "blacklist_title", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
 
@@ -297,8 +297,8 @@ def test_whitelist_preview_shows_precedence_over_blacklist() -> None:
         )
 
         assert response.status_code == 200, f"/whitelist_preview failed: {response.text}"
-        assert "whitelist overrides blacklist" in response.text
-        assert "Sent" in response.text
+        assert "blacklist overrides whitelist" in response.text
+        assert "Skipped" in response.text
     finally:
         with contextlib.suppress(Exception):
             reader.delete_tag(feed_url, "blacklist_title")