feat: Add theme normalization and API integration for theme settings

docker-compose.dev.yml

@@ -0,0 +1,50 @@
+services:
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    command: uvicorn main:app --host 0.0.0.0 --port 8000 --reload
+    ports:
+      - "8000:8000"
+    environment:
+      - DATABASE_HOST=db
+      - DATABASE_PORT=5432
+      - DATABASE_USER=calminer
+      - DATABASE_PASSWORD=calminer
+      - DATABASE_NAME=calminer_dev
+    volumes:
+      - .:/app
+    depends_on:
+      db:
+        condition: service_healthy
+    networks:
+      - calminer_backend
+
+  db:
+    image: postgres:16
+    restart: unless-stopped
+    environment:
+      - POSTGRES_DB=calminer_dev
+      - POSTGRES_USER=calminer
+      - POSTGRES_PASSWORD=calminer
+      - LANG=en_US.UTF-8
+      - LC_ALL=en_US.UTF-8
+      - POSTGRES_INITDB_ARGS=--encoding=UTF8 --locale=en_US.UTF-8
+    ports:
+      - "5432:5432"
+    volumes:
+      - pg_data_dev:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U calminer -d calminer_dev"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - calminer_backend
+
+networks:
+  calminer_backend:
+    driver: bridge
+
+volumes:
+  pg_data_dev: