Remove legacy LSTM retraining

tests/test_config.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 import pytest
 
-from crypto_spot_bot.config import load_settings
+from crypto_spot_bot.config import FIXED_SPOT_SYMBOLS, load_settings
 
 
 def test_live_mode_requires_explicit_unlock(tmp_path, monkeypatch) -> None:
@@ -61,3 +61,18 @@ def test_llm_advisor_is_disabled_by_default(tmp_path, monkeypatch) -> None:
     settings = load_settings(env_file)
 
     assert settings.llm_advisor_enabled is False
+
+
+def test_default_symbols_are_fixed_six_pairs(tmp_path, monkeypatch) -> None:
+    monkeypatch.delenv("AUTO_SELECT_SYMBOLS", raising=False)
+    monkeypatch.delenv("TOP_SYMBOLS_COUNT", raising=False)
+    monkeypatch.delenv("SYMBOLS", raising=False)
+    monkeypatch.setenv("TRADING_MODE", "paper")
+    env_file = tmp_path / ".env"
+    env_file.write_text("TRADING_MODE=paper\nSYMBOLS=\n", encoding="utf-8")
+
+    settings = load_settings(env_file)
+
+    assert settings.auto_select_symbols is False
+    assert settings.top_symbols_count == 6
+    assert settings.symbols == FIXED_SPOT_SYMBOLS