Chat: removed all thread abstraction. Every message in a channel now
renders inline chronologically as a flat list — no compact rows, no
thread panel, no thread navigation. Just messages, like Slack.
OOM fix: snapshot now limits fast-growing tables (chat_messages: 500,
task_runs: 200, provider_requests: 100) instead of loading unbounded
rows. This prevents the renderer V8 heap from growing past 3.5GB and
crashing. The notifyDataChanged callback is also wrapped in try/catch
to prevent errors when the renderer frame is disposed during agent runs.
ZacharyZhang-NY
8b2f94a715