fix: cooking mode shortcuts panel overflow in French (v0.28.1)

Longer French labels pushed the absolutely-positioned help panel past
its content box with no height cap or wrap guard, overlapping the
surrounding cooking-mode chrome. Cap panel height with internal
scroll, stack columns on narrow viewports, and let rows wrap instead
of forcing horizontal overflow.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "epicure",
-  "version": "0.28.0",
+  "version": "0.28.1",
   "private": true,
   "scripts": {
     "dev": "pnpm --filter web dev",