Use explicit Word equation markers

tests/test_config.py

@@ -13,7 +13,7 @@ def test_load_default_config(tmp_path):
 
     assert cfg.provider == "ollama"
     assert cfg.hotkey == "ctrl+alt+a"
-    assert cfg.math_text_format == "word_equation"
+    assert cfg.math_text_format == "plain"
     assert "Réponds directement" in cfg.system_prompt