Add Phase E's changed defaults and new configurations to the upgrade note

Text fields bounded from medium, dialog scroll dividers and the new meaning of
separator, the two-line snackbar, bottom sheet stops, chip set scroll buttons,
and a list of the configurations 2.0.0 adds.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

UPGRADE.md

@@ -106,15 +106,42 @@ over a colour, use the role directly.
   `rail-collapsed:` swap); new `divider` and `fill` props.
 - `<x-icon optical="20">` selects the optical-size-20 cut; the components pass it for their own
   small icons, applications pass it for icons drawn at 20px or less.
+- A text field stops at 40rem wide from `medium:`, as M3 bounds fields on wider windows; a
+  `max-w-*` class on the field beats it, and `full` removes it.
+- Every `<x-modal>` draws a rule under its header and over its actions while its body scrolls,
+  and neither when the body fits. `separator` now means "always draw both rules" and no longer
+  renders two `<x-divider>` elements; the spacing between header, body and actions moved to
+  M3's split gaps, so a dialog that fits is a few pixels shorter.
+- A snackbar with a `description` is 68px tall, and below `medium:` a two-line snackbar with an
+  action puts the action under the text. Alt+G moves focus to an actioned snackbar.
+- `<x-bottom-sheet>`'s drag now follows the pointer and settles on the nearest preset height when
+  `heights` or `snap` is set; without stops it behaves as before.
+- A chip set with `scroll` shows a scroll button over each overflowing edge on fine pointers.
 
-### 6. Tests and guards
+### 6. New in 2.0.0
+
+Nothing to migrate, but worth knowing: submenus (`<x-menu-item submenu>`), a filtering menu
+(`<x-menu filter>`), gap-grouped menu items (`<x-menu-group gap>`), square button groups
+(`shape="square"`), managed selection on connected groups (`selection="single|multi" required`),
+FAB collapse on scroll (`<x-fab collapse-on-scroll>`), the tall navigation bar and hide-on-scroll
+(`tall`, `hide-on-scroll`; `tall-bar`, `hide-bar-on-scroll` on the shell), the narrow, centred and
+hide-when-collapsed rail (`width="narrow"`, `align="center"`, `hide-when-collapsed`), a docked
+toolbar with a FAB and a rounded large-screen form (`rounded`), app bar actions that overflow into
+a menu (`:actions="[…]"`), the list item's `video` slot, the card's dragged state, the standard
+side sheet (`<x-drawer standard>`), bottom sheet preset heights, the multi-aspect carousel
+(`layout="multi-aspect"`), the divider with a subheader (`<x-divider text>`), the character counter
+(`counter`), the vertical slider (`orientation="vertical"`), the full-screen range date picker on
+compact windows, search's icon entry point and suggestions (`trigger="icon"`, `suggestions` slot),
+the contrast toggle (`<x-theme-toggle mode="contrast">`) and the Standard motion scheme.
+
+### 7. Tests and guards
 
 Add `DesignGuard`'s new checks to the application's design test (`forbidOpacityInk()` and
 `forbidAbsolutes()` are opt-in). Browser tests that assert widths switch at 640/1024/1280 now
 switch at 600/840/1200; tests that read `role="alert"` on an alert, `aria-pressed` on the time
 picker's period buttons or `data-theme-option` need the new hooks above.
 
-### 7. For AI agents
+### 8. For AI agents
 
 `php artisan boost:update --discover` picks up the new `material-3` guideline and the
 `material-3-design` skill, which state M3's rules and tables beside the library's utilities.