Square the full-screen dialog with the M3 corner token, and guard every package view

The one rounded-none left behind by the scale clearing becomes rounded-corner-none,
so the design guard's test of the package's own views needs no filter any more:
the breakpoint migration landed too.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

package-lock.json

@@ -1,5 +1,5 @@
 {
-    "name": "agent-afa50210f14592c5f",
+    "name": "livewire-material",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {