Herald v0.7.0-beta.2

Herald v0.7.0-beta.2

Highlights

• Adds shared mailbox retrieval across Timeline search, Gollem chat tools, daemon search, MCP search, and SSH-backed sessions.
• Improves keyword search so multi-word queries can match across sender and subject, including simple singular/plural variants.
• Adds Gollem chat tool policy that hides mailbox tools for plain chat turns and requires the relevant first tool for explicit retrieval or summary requests.
• Keeps the chat drawer input visible after long tool-style answers.
• Publishes the v0.7 "What's New" docs page with screenshots and updates the docs sidebar and README for Herald Memories.

Fixes

• Aligns daemon and MCP search behavior with the same retrieval semantics used by the TUI.
• Adds regression coverage for retrieval merging, query tokenization, cache keyword matching, chat tool dataflow, and chat panel layout.