v0.8.0

v0.8.0

• Refactored Perplexity/Sonar helper module for the current Perplexity API workflow.
• Kept Perplexity on the OpenAI-compatible Chat Completions endpoint by default.
• Added configurable Perplexity endpoint support via [Perplexity] -> Endpoint.
• Kept sonar as the default Perplexity model.
• Added safer Perplexity config loading, retry handling, error handling, and response parsing.
• Preserved old Perplexity helper names/signatures for compatibility.
• Updated Perplexity-side OpenAI language detection helper for newer model payload rules.
• Removed stale hardcoded gpt-4o-mini fallback assumptions.
• Refactored DuckDuckGo search / agentic browsing helper for modern OpenAI tool-calling compatibility.
• Added modern tools / tool_choice / tool_calls support for the DuckDuckGo sub-agent.
• Kept backward-compatible legacy function_call parsing.
• Updated DuckDuckGo sub-agent payload rules for GPT-5.x-era/non-GPT-4 model families.
• Hardened DuckDuckGo fallback behavior when sub-agent calls, webpage fetching, or output parsing fail.
• Preserved non-agentic DuckDuckGo search behavior using lynx.
• Improved Telegram HTML safety and webpage dump handling.
• General cleanup of stale pre-5.x OpenAI model/default assumptions.