Various tweaks to theme, more code coverage

tests/test_settings_module.py

@@ -0,0 +1,28 @@
+from bouquin.db import DBConfig
+import bouquin.settings as settings
+
+
+class FakeSettings:
+    def __init__(self):
+        self.store = {}
+
+    def value(self, key, default=None, type=None):
+        return self.store.get(key, default)
+
+    def setValue(self, key, value):
+        self.store[key] = value
+
+
+def test_save_and_load_db_config_roundtrip(monkeypatch, tmp_path):
+    fake = FakeSettings()
+    monkeypatch.setattr(settings, "get_settings", lambda: fake)
+
+    cfg = DBConfig(path=tmp_path / "db.sqlite", key="k", idle_minutes=7, theme="dark")
+    settings.save_db_config(cfg)
+
+    # Now read back into a new DBConfig
+    cfg2 = settings.load_db_config()
+    assert cfg2.path == cfg.path
+    assert cfg2.key == "k"
+    assert cfg2.idle_minutes == "7"
+    assert cfg2.theme == "dark"