Require range syntax for every stylesheet's media queries

Plan step 37 review. Folding the layout-only checks into the all.css-wide
ones dropped the layout test's requirement that a width query be written
as a range (`width >= 840px`), leaving only its unit and breakpoint
checked. The all.css-wide media query test now rejects min-/max- width,
height and aspect-ratio features in every stylesheet, which the package
already never writes.

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

tests/Feature/StylesheetsTest.php

@@ -324,6 +324,10 @@ it('writes a media query, anywhere all.css reaches, only at M3\'s breakpoints, i
             && preg_match('/(?:^|[\s:<>=(])(?:min-|max-)?height\b/', $feature) === 1
             && ! str_contains($feature, 'width');
 
+        // Range syntax (`width >= 840px`, `840px <= width < 1200px`), as the layout stylesheets'
+        // own check required before it folded into this one: never `min-width`/`max-width`.
+        expect($feature)->not->toMatch('/\b(?:min|max)-(?:width|height|aspect-ratio)\b/', "{$query} is not written as a range");
+
         preg_match_all('/(\d*\.?\d+)([a-z%]*)/i', $feature, $lengths, PREG_SET_ORDER);
 
         foreach ($lengths as [, $number, $unit]) {