feat(core): integrate PDF tables, images, and production translator b...

.env.example

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+# PROTranslate Configuration
+
+# Translator Mode
+# Options: mock (for testing) or api (for production)
+TRANSLATOR_MODE=mock
+
+# API Settings (required for api mode)
+# Gemini API key (get from https://aistudio.google.com/app/apikey)
+GEMINI_API_KEY=your_gemini_api_key_here
+# Alternative: GOOGLE_API_KEY (GEMINI_API_KEY takes precedence)
+# GOOGLE_API_KEY=your_google_api_key_here
+
+# API Provider (default: gemini_openai_compat)
+API_PROVIDER=gemini_openai_compat
+
+# API Base URL (default for Gemini OpenAI-compatible endpoint)
+API_BASE_URL=https://generativelanguage.googleapis.com/v1beta/openai/
+
+# Model (default: gemini-1.5-flash for cost efficiency)
+MODEL=gemini-1.5-flash
+
+# Request Settings
+TIMEOUT_SECONDS=30
+RETRY_MAX=3
+RETRY_BACKOFF_BASE=2.0
+
+# Chunking Settings
+MAX_CHUNK_CHARS=2000
+
+# Cache Settings
+CACHE_ENABLED=true
+CACHE_PATH=outputs/cache
+
+# Glossary Settings
+GLOSSARY_PATH=config/glossary.json
+
+# Prompt Version
+PROMPT_VERSION=v1