feat: Add database migrations and auth system

- Add Alembic for database migrations
- Implement user authentication system
- Update frontend styles and components
- Add new test audio functionality
- Update stream management and UI

DATABASE.md

@@ -0,0 +1,93 @@
+# Database Setup and Migrations
+
+This document explains how to set up and manage the database for the dicta2stream application.
+
+## Prerequisites
+
+- PostgreSQL database server
+- Python 3.8+
+- Required Python packages (install with `pip install -r requirements.txt`)
+
+## Initial Setup
+
+1. Create a PostgreSQL database:
+   ```bash
+   createdb dicta2stream
+   ```
+
+2. Set up the database URL in your environment:
+   ```bash
+   echo "DATABASE_URL=postgresql://username:password@localhost/dicta2stream" > .env
+   ```
+   Replace `username` and `password` with your PostgreSQL credentials.
+
+3. Initialize the database:
+   ```bash
+   python init_db.py
+   ```
+
+## Running Migrations
+
+After making changes to the database models, you can create and apply migrations:
+
+1. Install the required dependencies:
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+2. Run the migrations:
+   ```bash
+   python run_migrations.py
+   ```
+
+## Database Models
+
+The application uses the following database models:
+
+### User
+- Stores user account information
+- Fields: username, email, hashed_password, is_active, created_at, updated_at
+
+### Session
+- Manages user sessions
+- Fields: id, user_id, token, ip_address, user_agent, created_at, expires_at, last_used_at, is_active
+
+### PublicStream
+- Tracks publicly available audio streams
+- Fields: uid, filename, size, mtime, created_at, updated_at
+
+### UserQuota
+- Tracks user storage quotas
+- Fields: uid, storage_bytes, updated_at
+
+### UploadLog
+- Logs file uploads
+- Fields: id, uid, filename, size, ip_address, user_agent, created_at
+
+## Backing Up the Database
+
+To create a backup of your database:
+
+```bash
+pg_dump -U username -d dicta2stream -f backup.sql
+```
+
+To restore from a backup:
+
+```bash
+psql -U username -d dicta2stream -f backup.sql
+```
+
+## Troubleshooting
+
+- If you encounter connection issues, verify that:
+  - The PostgreSQL server is running
+  - The database URL in your .env file is correct
+  - The database user has the necessary permissions
+
+- If you need to reset the database:
+  ```bash
+  dropdb dicta2stream
+  createdb dicta2stream
+  python init_db.py
+  ```