fix: align production defaults and close review parity gaps

Ship greenfield min_rr=2.0 and conf=0, read-only Structural S/R, indicator
cache invalidation, and UI/gate language that treats GTL as screening not exit.
Align strategy_rank missing-vol fallback live vs backtest, single-source
PRIMARY_TARGET_MIN_RR, expand prod parity tests, and drop dead FE clients.

tests/unit/test_momentum_service.py

@@ -71,10 +71,13 @@ async def test_ranks_universe_into_raw_percentiles_when_benchmark_missing(sessio
     await _seed(session, "MID", rate=1.002)
     await _seed(session, "LOW", rate=0.999)     # declining → bottom momentum
 
+    ranks = await ms.compute_activation_ranks(session)
+    assert ranks["HIGH"]["momentum_percentile"] == 100.0
+    assert ranks["MID"]["momentum_percentile"] == 50.0
+    assert ranks["LOW"]["momentum_percentile"] == 0.0
+    # Thin momentum-only view stays aligned with the production ranker.
     pct = await ms.compute_momentum_percentiles(session)
-    assert pct["HIGH"] == 100.0
-    assert pct["MID"] == 50.0
-    assert pct["LOW"] == 0.0
+    assert pct == {s: ranks[s]["momentum_percentile"] for s in pct}
 
 
 async def test_ranks_universe_into_residual_percentiles_when_benchmark_available(session, monkeypatch):
@@ -91,6 +94,10 @@ async def test_ranks_universe_into_residual_percentiles_when_benchmark_available
     await _seed_closes(session, "BETA", market)
     await _seed_closes(session, "LAG", [market[i] * (0.9992 ** i) for i in range(n)])
 
+    ranks = await ms.compute_activation_ranks(session)
+    assert ranks["DRIFT"]["momentum_percentile"] == 100.0
+    assert ranks["BETA"]["momentum_percentile"] == 50.0
+    assert ranks["LAG"]["momentum_percentile"] == 0.0
     pct = await ms.compute_momentum_percentiles(session)
     assert pct["DRIFT"] == 100.0
     assert pct["BETA"] == 50.0
@@ -105,6 +112,9 @@ async def test_short_history_ticker_is_unranked(session, monkeypatch):
     await _seed(session, "LONG", rate=1.005)
     await _seed(session, "SHORTHX", rate=1.005, n=100)  # < 1y → no momentum
 
+    ranks = await ms.compute_activation_ranks(session)
+    assert "LONG" in ranks and ranks["LONG"]["momentum_percentile"] is not None
+    assert "SHORTHX" not in ranks or ranks["SHORTHX"]["momentum_percentile"] is None
     pct = await ms.compute_momentum_percentiles(session)
     assert "LONG" in pct
     assert "SHORTHX" not in pct
@@ -115,4 +125,5 @@ async def test_empty_universe_returns_empty(session, monkeypatch):
         return {}
 
     monkeypatch.setattr(ms, "_load_activation_benchmark", no_benchmark)
+    assert await ms.compute_activation_ranks(session) == {}
     assert await ms.compute_momentum_percentiles(session) == {}