fix: use absolute paths for DATA_DIR and LOGS_DIR in start_server.sh

- Resolves sqlite3.OperationalError when database path is relative
- Uses script directory as base for all relative paths
- Ensures consistent behavior regardless of working directory

start_server.sh

@@ -29,8 +29,8 @@ pip install -q -r backend/requirements.txt
 LOCAL_IP=$(ipconfig getifaddr en0 || ipconfig getifaddr en1 || echo "localhost")
 export ALLOWED_ORIGINS="http://localhost:$FRONTEND_PORT,http://localhost:$BACKEND_PORT,https://localhost:$FRONTEND_SSL_PORT,https://localhost:$BACKEND_SSL_PORT,https://$LOCAL_IP:$FRONTEND_SSL_PORT,https://$LOCAL_IP:$BACKEND_SSL_PORT"
 export JWT_SECRET_KEY="${JWT_SECRET_KEY:-ephemeral-dev-key-$(date +%s)}"
-export DATA_DIR="./data"
-export LOGS_DIR="./logs"
+export DATA_DIR="$(cd "$(dirname "$0")" && pwd)/data"
+export LOGS_DIR="$(cd "$(dirname "$0")" && pwd)/logs"
 
 echo "🔥 Starting Backend on port $BACKEND_PORT..."
 echo "   CORS origins: $ALLOWED_ORIGINS"