Add database migration to replace customPrompts with personas in user settings

src/lib/migrations/routines/11-add-personas.ts

@@ -0,0 +1,36 @@
+import type { Migration } from ".";
+import { collections } from "$lib/server/database";
+import { DEFAULT_PERSONAS } from "$lib/server/defaultPersonas";
+import { ObjectId } from "mongodb";
+
+const migration: Migration = {
+	_id: new ObjectId("000000000000000000000011"),
+	name: "Add personas to settings",
+	up: async () => {
+		const { settings } = collections;
+
+		// Add personas array and activePersona to all existing settings
+		await settings.updateMany(
+			{},
+			{
+				$set: {
+					activePersona: "default",
+					personas: DEFAULT_PERSONAS.map((p) => ({
+						...p,
+						createdAt: new Date(),
+						updatedAt: new Date(),
+					})),
+					updatedAt: new Date(),
+				},
+				// Remove customPrompts field
+				$unset: {
+					customPrompts: "",
+				},
+			}
+		);
+
+		return true;
+	},
+};
+
+export default migration;