feat: add KeysModal for managing private key accounts

- Introduced a new KeysModal component to display and manage nsec/npub for accounts with local private keys.
- Updated AppHeader and Profile views to include a "My Keys" button, conditionally rendered based on the presence of a private key.
- Enhanced the useAccounts composable to determine if the active account holds a local private key, enabling key management functionality.

These changes improve user access to their private key information and enhance the overall account management experience.

backend/src/database/migrations/1776400000000-add-payment-method-id-to-payments.ts

@@ -0,0 +1,28 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddPaymentMethodIdToPayments1776400000000
+  implements MigrationInterface
+{
+  name = 'AddPaymentMethodIdToPayments1776400000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    // Add the missing payment_method_id column
+    await queryRunner.query(
+      `ALTER TABLE "payments" ADD "payment_method_id" character varying`,
+    );
+
+    // Add foreign key constraint to payment_methods
+    await queryRunner.query(
+      `ALTER TABLE "payments" ADD CONSTRAINT "FK_payments_payment_method_id" FOREIGN KEY ("payment_method_id") REFERENCES "payment_methods"("id") ON DELETE SET NULL ON UPDATE NO ACTION`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "payments" DROP CONSTRAINT "FK_payments_payment_method_id"`,
+    );
+    await queryRunner.query(
+      `ALTER TABLE "payments" DROP COLUMN "payment_method_id"`,
+    );
+  }
+}