Prevent saving/deleting Lovelace config in safe mode (#32319)

homeassistant/components/lovelace/dashboard.py

@@ -101,6 +101,9 @@ class LovelaceStorage(LovelaceConfig):
 
     async def async_save(self, config):
         """Save config."""
+        if self.hass.config.safe_mode:
+            raise HomeAssistantError("Saving not supported in safe mode")
+
         if self._data is None:
             await self._load()
         self._data["config"] = config
@@ -109,6 +112,9 @@ class LovelaceStorage(LovelaceConfig):
 
     async def async_delete(self):
         """Delete config."""
+        if self.hass.config.safe_mode:
+            raise HomeAssistantError("Deleting not supported in safe mode")
+
         await self.async_save(None)
 
     async def _load(self):

tests/components/lovelace/test_dashboard.py

@@ -50,6 +50,16 @@ async def test_lovelace_from_storage(hass, hass_ws_client, hass_storage):
     assert not response["success"]
     assert response["error"]["code"] == "config_not_found"
 
+    await client.send_json(
+        {"id": 9, "type": "lovelace/config/save", "config": {"yo": "hello"}}
+    )
+    response = await client.receive_json()
+    assert not response["success"]
+
+    await client.send_json({"id": 10, "type": "lovelace/config/delete"})
+    response = await client.receive_json()
+    assert not response["success"]
+
 
 async def test_lovelace_from_storage_save_before_load(
     hass, hass_ws_client, hass_storage