feat(ai): integrate local Ollama AI for in-context sentence translation and caching (Task 13)

docker-compose.yml

@@ -15,4 +15,17 @@ services:
       - SECRET_KEY=study-qpid-pro-secret-key-change-in-prod
       - ADMIN_USERNAME=kopri
       - DB_PATH=/app/data/notes.db
+      - OLLAMA_BASE_URL=http://ollama:11434
+    depends_on:
+      - ollama
 
+  ollama:
+    image: ollama/ollama:latest
+    container_name: study-ollama
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:11434:11434"
+    volumes:
+      - ./data/ollama:/root/.ollama
+    environment:
+      - OLLAMA_KEEP_ALIVE=5m