release.2026-09-02T10-18-27Z.2908

## Feature Updates
- Webhook automation triggers can return configurable synchronous responses, enabling URL verification flows for platforms such as Feishu/Lark, Slack, WeCom, and DingTalk. Existing automations retain the default acknowledgement unless configured otherwise.
- Attachment previews now let users delete files directly and automatically move to a neighboring attachment after deletion.
- Chat agents can discover and work with multiple accessible bases in the chat’s space, with per-command base targeting.

## Bug Fixes & Improvements
- Improved table update reliability during connection timeouts, reducing failed schema operations and the need for manual recovery after completed rollbacks.
- Webhook tests now show the incoming request instead of trigger configuration, and partial configuration edits preserve existing authorization and response settings.
- Compacted linked-record rollups now return visible title strings instead of linked-record objects, preserve duplicate titles, and remain consistent across the UI and API. Integrations expecting object-shaped values may require updates.
- Attachment thumbnails and previews now fall back to file icons when an image cannot be rendered.
- Conditional rollup filters now preserve nested groups after saving and reopening, including in narrow settings panels, and lookup-number results remain consistent with API-configured filters.
- Improved base discovery for chat users with base-level access and prevented base-specific context from carrying across shared workspaces or resumed sessions.
- Fixed table update and computed-field backfill failures involving multi-value lookup or linked-record rollups, including formulas such as `max`, `min`, `and`, and `or`.