feat: add settings DB helpers with default fallback

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V57jSQPqwkGG8BuAXg59X5

Claude outputs/main.py

@@ -304,6 +304,36 @@ async def get_all_memory_facts() -> list:
     )
 
 
+SETTINGS_DEFAULTS = {
+    "assistant_name": "JARVIS",
+    "company_name": "MBO-Tech-IT",
+    "contact_email": "kontakt@mbo-tech-it.de",
+}
+
+
+async def get_setting(key: str) -> str:
+    row = await db_query("SELECT value FROM settings WHERE key = %s", (key,), fetch="one")
+    return row["value"] if row else SETTINGS_DEFAULTS[key]
+
+
+async def get_all_settings() -> dict:
+    rows = await db_query("SELECT key, value FROM settings", fetch="all")
+    merged = dict(SETTINGS_DEFAULTS)
+    for row in rows:
+        merged[row["key"]] = row["value"]
+    return merged
+
+
+async def set_setting(key: str, value: str):
+    await db_query(
+        """
+        INSERT INTO settings (key, value) VALUES (%s, %s)
+        ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value, updated_at = CURRENT_TIMESTAMP
+        """,
+        (key, value),
+    )
+
+
 async def upsert_conversation_summary(conversation_id: int, summary: str, embedding: list):
     await db_query(
         """

Claude outputs/tests/test_settings.py

@@ -0,0 +1,64 @@
+import os
+import sys
+from unittest.mock import AsyncMock, MagicMock, patch
+
+sys.modules["psycopg2"] = MagicMock()
+sys.modules["psycopg2.pool"] = MagicMock()
+sys.modules["psycopg2.extras"] = MagicMock()
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+import pytest
+
+import main
+
+
+@pytest.mark.asyncio
+async def test_get_setting_returns_stored_value():
+    with patch.object(main, "db_query", new=AsyncMock(return_value={"value": "Custom GmbH"})) as mock_query:
+        value = await main.get_setting("company_name")
+
+    assert value == "Custom GmbH"
+    args, kwargs = mock_query.call_args
+    assert "SELECT value FROM settings" in args[0]
+    assert args[1] == ("company_name",)
+
+
+@pytest.mark.asyncio
+async def test_get_setting_falls_back_to_default_when_missing():
+    with patch.object(main, "db_query", new=AsyncMock(return_value=None)):
+        value = await main.get_setting("assistant_name")
+
+    assert value == "JARVIS"
+
+
+@pytest.mark.asyncio
+async def test_get_all_settings_merges_defaults_with_stored_overrides():
+    rows = [{"key": "assistant_name", "value": "FRIDAY"}]
+    with patch.object(main, "db_query", new=AsyncMock(return_value=rows)):
+        settings = await main.get_all_settings()
+
+    assert settings == {
+        "assistant_name": "FRIDAY",
+        "company_name": "MBO-Tech-IT",
+        "contact_email": "kontakt@mbo-tech-it.de",
+    }
+
+
+@pytest.mark.asyncio
+async def test_get_all_settings_returns_defaults_when_table_empty():
+    with patch.object(main, "db_query", new=AsyncMock(return_value=[])):
+        settings = await main.get_all_settings()
+
+    assert settings == main.SETTINGS_DEFAULTS
+
+
+@pytest.mark.asyncio
+async def test_set_setting_upserts_value():
+    with patch.object(main, "db_query", new=AsyncMock(return_value=None)) as mock_query:
+        await main.set_setting("company_name", "Neue Firma GmbH")
+
+    args, kwargs = mock_query.call_args
+    assert "INSERT INTO settings" in args[0]
+    assert "ON CONFLICT (key) DO UPDATE" in args[0]
+    assert args[1] == ("company_name", "Neue Firma GmbH")