Dialogs scroll inside themselves on a phone: nothing squeezed, clear of the status bar, buttons pinned

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

BUGS.md

@@ -348,6 +348,17 @@ and a regression of Escape everywhere, terminals, Files, sensors, alerts and dee
    and menu: widget picker, machine menu, rule editor, Power, New stack, and that Escape on
    "Delete the rule?" deletes nothing.
 
+10. ✅ **Phone: the bottom of the New container dialog could not be reached** (Mitchell, from
+    his iPhone). A dialog is a column whose parts were allowed to shrink, so instead of the
+    dialog scrolling, the one part with its own scrollbar — the compose preview — was
+    squeezed to 22 px and everything "fitted". And `92vh` on iOS is taller than the screen
+    with the address bar gone, so the top sat under the clock. Parts now keep their height
+    and the dialog scrolls inside itself; it is never taller than the space between the
+    status bar and the home indicator (safe-area insets, no `vh`); Create / Cancel — and
+    any error — stay pinned at the bottom while the form scrolls. Applies to every dialog;
+    measured at 390×844, 375×667 and sideways, and the picker, rule editor, token and Power
+    dialogs rechecked.
+
 ## Checked and fine
 
 All 13 pages × four machines × both sizes: no page errors, failed requests, sideways