fix(ui): expand session dialogs and repeat confirmation actions

DESIGN.md

@@ -344,6 +344,22 @@ default, hover, focus, active, disabled, loading, and error behavior where those
   In embedded mode the portal owns the red header and left sidebar; ThothII must not duplicate them. Size to the
   actual application container. Narrow session document panels may use the available width.
 
+### Session review and confirmations
+
+Session dialogs use the visible application area, including the portal's header
+and side rail. Artifact and schema-column review can grow to 80rem wide and the
+available height; short confirmations use up to 40rem and at least 18rem when
+space permits. Keep a 24px outer margin on desktop and 8px on small or short
+screens. Long review content scrolls internally; on very short screens the
+whole dialog can also scroll so every action remains reachable.
+
+Session forms and review gates repeat their existing primary confirmation above
+and below the content, sharing selection, validation, pending state and response
+handlers. Alternate-response inputs follow the same rule. Reserved navigation
+controls remain below the review. Stop/delete initially focus Cancel; rename
+initially focuses the name field. Administration dialogs and forms retain their
+existing layout and actions.
+
 ### Tabs
 
 - **Shape:** compact label tabs sit on a shared baseline with rounded top corners and a two-pixel