feat(hikes): inline cantonal Wappen next to region label

26 public-domain coats of arms fetched once from Wikimedia Commons
via scripts/download-cantons.ts and committed under static/cantons/.
$lib/data/cantons.ts maps Swisstopo's free-form name (German default,
French/Italian alternates for Romandie / Ticino) to the ISO code +
emblem URL.

Card shows an 18×22 emblem, detail page a 24×30 one — both with a
drop-shadow so they read against the dark hero gradient. Unknown
canton names fall back to plain text without the emblem.

The downloaded SVGs are written verbatim — earlier draft prepended a
provenance HTML comment but that breaks the leading `<?xml … ?>` and
browsers refuse to render the image. Provenance lives in the script's
CANTONS table instead.

static/cantons/gr.svg

@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1900 2307">
+<title>Wappen Graubünden</title>
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