fix(search): apply recency UTC fix to live ranking module

tests/test_search_ranking_recency.py

@@ -8,7 +8,8 @@ module-level, time-injectable function.
 
 from datetime import datetime, timezone
 
-from src.search.ranking import recency_score, _utcnow_naive
+import services.search.ranking as live_ranking
+from services.search.ranking import recency_score, _utcnow_naive, rank_search_results
 
 
 def test_fresh_result_scores_one():
@@ -37,3 +38,37 @@ def test_default_now_is_naive_utc():
     assert now.tzinfo is None
     reference = datetime.now(timezone.utc).replace(tzinfo=None)
     assert abs((now - reference).total_seconds()) < 5
+
+
+def test_supported_timestamp_formats_parse():
+    # All three formats the current implementation supports resolve to the same
+    # ~4-day-old age, so each scores a full 1.0.
+    now = datetime(2026, 1, 5, 12, 0, 0)
+    assert recency_score("2026-01-01", now=now) == 1.0
+    assert recency_score("2026-01-01T08:30:00", now=now) == 1.0
+    assert recency_score("2026-01-01 08:30:00", now=now) == 1.0
+
+
+def test_shim_reexports_live_objects():
+    # src.search.ranking is a compatibility shim; it must expose the *same*
+    # objects as the live services module so the two cannot diverge.
+    import src.search.ranking as shim
+
+    assert shim.recency_score is live_ranking.recency_score
+    assert shim.rank_search_results is live_ranking.rank_search_results
+    assert shim._utcnow_naive is live_ranking._utcnow_naive
+
+
+def test_live_rank_path_prefers_newer_result(monkeypatch):
+    # Pin "now" so age scoring is deterministic. The two results are identical
+    # apart from age, isolating recency as the only differentiator.
+    monkeypatch.setattr(live_ranking, "_utcnow_naive", lambda: datetime(2026, 1, 31))
+    results = [
+        {"title": "Report", "url": "https://example.org/a", "snippet": "x", "age": "2026-01-01"},
+        {"title": "Report", "url": "https://example.org/b", "snippet": "x", "age": "2026-01-29"},
+    ]
+
+    ranked = rank_search_results("report", results)
+
+    assert ranked[0]["url"] == "https://example.org/b"
+    assert ranked[1]["url"] == "https://example.org/a"