feat: persist settings and enrich conversation context

src/config/index.ts

@@ -157,7 +157,20 @@ export const ConfigSchema = z.object({
 
 export type Config = z.infer<typeof ConfigSchema>;
 
-export function loadConfig(): Config {
+export interface ConfigPersistence {
+  load(environment?: NodeJS.ProcessEnv): Config | null;
+  save(config: Config): void;
+}
+
+/**
+ * Loads the database-backed configuration. A legacy YAML file is imported
+ * exactly once when the database has not yet been seeded, which makes the
+ * migration safe for existing installations.
+ */
+export function loadConfig(store?: ConfigPersistence): Config {
+  const storedConfig = store?.load(process.env);
+  if (storedConfig) return storedConfig;
+
   const configPath = path.resolve(process.cwd(), 'config.yaml');
 
   if (!fs.existsSync(configPath)) {
@@ -173,6 +186,11 @@ export function loadConfig(): Config {
   }
   rawConfig.openrouter.apiKey = process.env.OPENROUTER_API_KEY || rawConfig.openrouter.apiKey;
 
+  if (!rawConfig.database) rawConfig.database = {};
+  // The database must be located before application settings can be read, so
+  // its path is an environment-owned bootstrap value rather than app config.
+  rawConfig.database.path = process.env.DATABASE_PATH ?? './data/reddit-bot.db';
+
   if (process.env.WEB_DASHBOARD_TOKEN !== undefined) {
     if (!rawConfig.web) rawConfig.web = {};
     rawConfig.web.authToken = process.env.WEB_DASHBOARD_TOKEN;
@@ -195,5 +213,6 @@ export function loadConfig(): Config {
     throw new Error('WEB_DASHBOARD_TOKEN environment variable or web.authToken configuration is required when the dashboard is enabled');
   }
 
+  store?.save(result.data);
   return result.data;
 }