Fix XML tool-call text leaking to user; parse and run tools instead.

Fix missing Optional import and upgrade HF Docker to Python 3.11.

Fix Python 3.9 compatibility for HF Space (Optional type hints).

Document browser-side TTS in voice config endpoint.

Add voice TTS, expanded tools, voice-mode chat, and ROLLBACK guide.

Fix Groq malformed tool calls: invoke-first, sanitize names, expand retries.

Adjust system prompt: skip mandatory current_datetime, inject today for web_search.

Replace DuckDuckGo web search with Tavily API.

Fix Groq tool_use_failed with retry and qwen fallback for reliable tool calls.

Upgrade main chat model to Groq llama-3.3-70b-versatile.

Force web search for current facts; improve DDGS results for office-holder queries.

Stream Groq tokens live via LangGraph custom SSE events.

Add async concurrency with semaphores for up to 50 parallel chat streams.

Add detailed system prompt for tool routing and ChatGPT-style behavior.

fix: remove sqlite db files from tracking

fix: summary leak, timeout, wikipedia tool