Refactor authentication and session management

- Updated Dockerfile to use Python 3.13 and streamline system dependencies installation.
- Enhanced user session handling in auth.py, introducing a centralized method for retrieving the current user from the session.
- Removed deprecated auth routes and consolidated logic for user authentication and profile management.
- Improved error handling and user feedback in redeem.py and teams.py, ensuring users are redirected to login when not authenticated.
- Updated requirements.txt to include necessary packages for enhanced security and functionality.
- Added phpMyAdmin service to docker-compose for easier database management.

Dockerfile

@@ -1,31 +1,23 @@
-# Use Python 3.11 (or whichever version you prefer)
-FROM python:3.11-slim
+FROM python:3.13
 
-# Create working directory
 WORKDIR /app
 
-# Install system dependencies needed for mysqlclient
-RUN apt-get update && apt-get install -y \
-    pkg-config \
-    default-libmysqlclient-dev \
-    build-essential \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
+# Install system dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends gcc libc-dev default-libmysqlclient-dev && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 
-# Copy requirements first (for caching)
+# Copy requirements first to leverage Docker cache
 COPY requirements.txt .
-
-# Install dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Explicitly install pymysql (in case it's missing from requirements.txt)
-RUN pip install --no-cache-dir pymysql cryptography
-
-# Copy the rest of the code
+# Copy application code
 COPY . .
 
-# Expose port
-EXPOSE 8000
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
 
-# Run the FastAPI app with Uvicorn
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
+# Command to run when container starts
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--reload"]