Feature/inv-119 초대장 update api (#36)

* feat: implement modify invitation method

* feat: add update updated_at logic

* fix: syntax error in where clause

src/lib/db/schema/invitations.query.ts

@@ -0,0 +1,35 @@
+"use server";
+
+import { eq } from "drizzle-orm";
+import { db } from "~/lib/db";
+import { invitations } from "~/lib/db/schema/invitations";
+
+type UpdateInvitationParams = {
+  id: string;
+  title?: string;
+  description?: string;
+  eventDate?: Date;
+  eventUrl?: string;
+  customFields?: Record<string, any>;
+};
+
+async function updateInvitation(params: UpdateInvitationParams) {
+  const { id, ...updates } = params;
+
+  if (!id) {
+    throw new Error("ID is required to update an invitation");
+  }
+
+  try {
+    await db
+      .update(invitations)
+      .set({
+        ...updates,
+        updatedAt: new Date(),
+      })
+      .where(eq(invitations.id, id));
+  } catch (error) {
+    console.error("Error updating invitation:", error);
+    throw new Error("Could not update invitation");
+  }
+}