Adds 6 MCP tools so an LLM can read a user's Talk conversations and
post messages on their behalf, addressing the "read my chats and reply"
use case from issue #720:
- talk_list_conversations
- talk_get_conversation
- talk_get_messages
- talk_list_participants
- talk_send_message (auto-attaches a referenceId for retry dedup)
- talk_mark_as_read
Edit/delete messages, reactions, threads, and call/session ops are
intentionally out of scope for this first PR.
The TalkClient also exposes create_conversation/delete_conversation
for the integration test fixture; these are not registered as MCP
tools. A post-installation hook enables spreed in the docker dev env
so the integration suite has a real Talk backend to talk to.
Closes#720
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
