fix(acp,agent): support reasoning_content fallback and turn text publishing for local reasoning models

[mainza-ai]

Summary

This PR fixes core issues when running AI agents via buzz-acp and buzz-agent with local OpenAI-compatible reasoning models (e.g. 4-bit Gemma models served on OMLX/Ollama endpoints):

1. Reasoning Content Fallback: Local reasoning models output generated text inside reasoning_content or reasoning while returning content: "" (without tool_calls). Updates parse_openai and parse_responses in buzz-agent/src/llm.rs so text falls back to reasoning when content is empty.
2. Turn Text Accumulation & Fallback Channel Publishing: Non-tool-calling models do not invoke buzz messages send. buzz-acp now accumulates agent_message_chunk updates during a turn and automatically posts the cleaned turn text as a signed kind: 9 message event to the channel thread on StopReason::EndTurn.
3. Response Sanitization: Adds clean_agent_text_response in pool.rs to strip pseudo-tool JSON blocks (json {"reply_to": ...} ) and special model tokens (<|tool_call>, <|im_end|>) before channel publishing.

Testing & Verification

• Tested with local OMLX OpenAI-compatible endpoint (http://127.0.0.1:8787/v1) using Gemma-4 reasoning models.
• Verified agent messages stream and render directly in channel threads without leaking raw pseudo-tool JSON.
• Verified Rust workspace compilation and unit test suite pass (cargo test -p buzz-acp -p buzz-agent).

[mainza-ai]

Update: Multi-Tenant Loopback Host Normalization & Realtime NIP-29 Channel Discovery

This PR has been updated with surgical fixes resolving multi-tenant loopback isolation and realtime channel discovery for mentioned agents:

1. Multi-Tenant Loopback Host Normalization ( & ):

   • now folds local loopback host variants (, , ) into .
   • Ensures clients connecting across or map to the exact same Postgres .
   • Normalizes NIP-98 authentication URL host verification to prevent 401 URL mismatch errors during local development.

2. Realtime NIP-29 Channel Discovery ():

   • now inspects both tags (NIP-29 group members ) and tags.
   • Enables to dynamically subscribe to channels in real time as soon as an agent is added to a new channel.

3. Verification:

   • All workspace unit tests passed (, , , , ).
   • , , Biome linting, and desktop file size checks are 100% green.