feat: signal server tag

electron/migrations/1000000000012-AddHomeSignalServerUrl.ts

@@ -0,0 +1,13 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddHomeSignalServerUrl1000000000012 implements MigrationInterface {
+  name = 'AddHomeSignalServerUrl1000000000012';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`ALTER TABLE "users" ADD COLUMN "homeSignalServerUrl" TEXT`);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    // SQLite column removal requires table rebuilds. Keep rollback no-op.
+  }
+}