refactor(database): move db into typescript

- Implemented githubTokensDb for managing GitHub tokens with CRUD operations.
- Created
otificationPreferencesDb to handle user notification preferences.
- Added projectsDb for project path management and related operations.
- Introduced pushSubscriptionsDb for managing browser push subscriptions.
- Developed scanStateDb to track the last scanned timestamp.
- Established sessionsDb for session management with CRUD functionalities.
- Created userDb for user management, including authentication and onboarding.
- Implemented apidKeysDb for storing and managing VAPID keys.

feat(database): define schema for new database tables

- Added SQL schema definitions for users, API keys, user credentials, notification preferences, VAPID keys, push subscriptions, projects, sessions, scan state, and app configuration.
- Included necessary indexes for performance optimization.

refactor(shared): enhance type definitions and utility functions

- Updated shared types and interfaces for improved clarity and consistency.
- Added new types for credential management and provider-specific operations.
- Refined utility functions for better error handling and message normalization.

server/modules/database/repositories/vapid-keys.ts

@@ -0,0 +1,57 @@
+/**
+ * VAPID keys repository.
+ *
+ * Stores and retrieves the Web Push VAPID key pair.
+ */
+
+import { getConnection } from '@/modules/database/connection.js';
+
+type VapidKeyRow = {
+  public_key: string;
+  private_key: string;
+};
+
+type VapidKeyPair = {
+  publicKey: string;
+  privateKey: string;
+};
+
+export const vapidKeysDb = {
+  /** Returns the latest stored VAPID key pair, or null when unset. */
+  getVapidKeys(): VapidKeyPair | null {
+    const db = getConnection();
+    const row = db
+      .prepare(
+        'SELECT public_key, private_key FROM vapid_keys ORDER BY id DESC LIMIT 1'
+      )
+      .get() as Pick<VapidKeyRow, 'public_key' | 'private_key'> | undefined;
+
+    if (!row) return null;
+    return {
+      publicKey: row.public_key,
+      privateKey: row.private_key,
+    };
+  },
+
+  /** Persists a new VAPID key pair. */
+  createVapidKeys(publicKey: string, privateKey: string): void {
+    const db = getConnection();
+    db.prepare(
+      'INSERT INTO vapid_keys (public_key, private_key) VALUES (?, ?)'
+    ).run(publicKey, privateKey);
+  },
+
+  /** Replaces all existing keys with a fresh pair. */
+  updateVapidKeys(publicKey: string, privateKey: string): void {
+    const db = getConnection();
+    db.prepare('DELETE FROM vapid_keys').run();
+    vapidKeysDb.createVapidKeys(publicKey, privateKey);
+  },
+
+  /** Deletes all VAPID key rows. */
+  deleteVapidKeys(): void {
+    const db = getConnection();
+    db.prepare('DELETE FROM vapid_keys').run();
+  },
+};
+