feat: add AI-powered alt text generation for recipe images

- Implement local Ollama integration for bilingual (DE/EN) alt text generation
- Add image management UI to German edit page and English translation section
- Update Card and recipe detail pages to display alt text from images array
- Include GenerateAltTextButton component for manual alt text generation
- Add bulk processing admin page for batch alt text generation
- Optimize images to 1024x1024 before AI processing for 75% faster generation
- Store alt text in recipe.images[].alt and translations.en.images[].alt

.env.example

@@ -26,3 +26,6 @@ IMAGE_DIR="/path/to/static/files"
 # Translation Service (DeepL API)
 DEEPL_API_KEY="your-deepl-api-key"
 DEEPL_API_URL="https://api-free.deepl.com/v2/translate"  # Use https://api.deepl.com/v2/translate for Pro
+
+# AI Vision Service (Ollama for Alt Text Generation)
+OLLAMA_URL="http://localhost:11434"  # Local Ollama server URL