* feat: flow chat job-backed detail, smooth streaming and answer chrome
* chore: document setFlowPath, drop unused chatIdentity, tighten comments
* fix: read a nested agent tool's call from its own job
* fix: show only the model's arguments on a tool card read from its job
* feat: add attachments to the chat sdk message type
* refactor: read a flow chat message's files from the message, not its run
* fix: keep every job-backed answer when reads finish out of order
* refactor: build flow chat tool cards from the conversation row alone
* feat: keep the model picker's current choice when a flow chat retry replays its run
* fix: export ChatAttachment from the chat sdk entry point
* fix: drop a conversation list for the flow path before setFlowPath
* fix: return the current listing, not old-path rows, after setFlowPath
* fix: treat a listing stale on kind or path as one stale listing
* revert: drop setFlowPath and rebuild the chat when the flow path changes
* fix: refuse a flow chat retry once any turn ran while it read the run
* docs: say where a display message's createdAt comes from
* style: drop the rule between New chat and the conversation list
