Fix Admin Sanctuary Login and Database Initialization

[virtuehearts]

The admin login was failing because the database tables were not created and the admin user was not seeded. This PR automates the database setup process.

Changes:

1. New Script scripts/setup-db.js: Uses drizzle-kit push to synchronize the database schema and better-sqlite3 with bcryptjs to seed the admin user from .env credentials. It also seeds default aiSettings.
2. Updated scripts/init.js: Now calls scripts/setup-db.js after initializing the .env file, ensuring the database is always ready when the dev server starts.
3. Environment Setup: Added NEXTAUTH_URL to ensure NextAuth redirects work correctly in the development environment.

Verification:

• Ran npm run dev which triggered the automated setup.
• Verified database contents using a custom script and sqlite3.
• Performed a full login flow using a Playwright script, successfully reaching the Admin Sanctuary.
• Captured a screenshot of the admin panel as requested.

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PR created automatically by Jules for task 9921246373950003300 started by @virtuehearts

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