New features

• Configurable Kanban columns (WE5-28). Show, hide, reorder, and merge columns; multi-hop status changes and a target-status picker. Visibility and order live in the board preference; configuration is in the main toolbar.
• Card layout as a preference (WE5-24). Density and column markers on the header are stored.
• Add-on SDK package, zones, and add-on pages (WE5-17). Dedicated SDK package with host, zone, and manifest types; runtime menu contributions, record events, overlay records, and preferences in a dedicated namespace.
• host.invalidate and dialog.createRecord for add-ons (WE5-32).
• Filter bar as an add-on. Metric chips and named saved filters via setAdditionalWhere, active in all views.
• Project navigation as an add-on. Navigation context, sidebar slot, and board filters; sidebar panels know the rail mode.
• Native rich text (WE5-23) and option groups (WE5-25). Formatted text and option groups render in the form instead of being dropped or downgraded to a textarea.
• Reorder subform rows (WE5-29). With a position number, two buttons swap a row with its neighbor; the swap stays a draft until save.
• Time picker. String fields that hold times get a quarter-hour list; free text remains possible.
• Menu favorites. Menu items (including add-on items) can be starred; toggle between favorites and the full menu.
• Dashboard configuration view. Dedicated draft view with a tile catalog (task lists, charts, recently opened objects).
• Parallel SSO login. Redirect to the correct client; an empty callback whitelist keeps the default value.
• AI chat in the store. History, stream, and usage live in the configuration store; switching tabs no longer aborts a running reply. Download chip for generated PDFs; agent backend status in the stats line; read/write mode and message timestamps.

Improvements

• Subform: multi-line columns, calmer cells, indented list columns; date picker, column width, and required fields in cells; keyboard navigation (Tab moves field to field; a new row focuses the first writable field).
• Subform rows in the overlay open and page correctly; the overlay can be promoted to a workspace tab.
• Show the overlay only after the form has loaded (no flash of the empty min size).
• Editable server list (WE5-20) instead of a compiled-in list; successful logins are remembered.
• Proxy errors name the target and reason (WE5-21).
• Readable error messages instead of raw HTML error pages; failed list queries are visible (WE5-18).
• Confirmation dialog: Cancel is the default action; clearer labels instead of “Keep editing”.
• Toolbar: Delete uses an outlined style (destructiveOutline); create icon aligned.
• Dashboard stays mounted across tab switches so add-on tiles keep their record listeners.
• Add-on additional where clause works again (WE5-26).
• App settings in administration with translatable names for nuclosapp preferences.
• Configurable subform count on tabs (NUCLOS-11485).
• Connection diagram shows Client → Harness → Gateway → LLM and marks the first broken hop when Nuclosian is unavailable.
• Sample add-ons document local startup; parallel dev instances on separate ports (WE5-19).

Bug fixes

• No status reference-list call without a status model. Prevents HTTP 500 when opening lists without nuclosState.
• SSO logout: dedicated logout page instead of a 404 after post_logout_redirect_uri.
• Mermaid errors are validated before render and no longer stack as error graphics.
• Dashboard task lists and reference jump hardened (columns, overlay close on tab switch, jump only with read permission).
• VLP query (NUCLOS-11412): fixed invalid query when the default flag is removed from the datasource but still set in the layout.
• Nuclet import (NUCLOS-11428): no longer overrides system-specific report output trays.
• Date chooser (NUCLOS-10639): closes correctly on Enter.