help: let the dialog scroll

The shared modal-container rule slapped `overflow: hidden` on
`#help > div` to clip border-radius, which won over the Tailwind
`overflow-y-auto` on the same element and froze the scroll. Move
help to its own rule that keeps the rounded corners + shadow and
leaves overflow alone so the inline overflow-y-auto takes effect.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

electron/package.json

@@ -1,6 +1,6 @@
 {
   "name": "hyprcrd",
-  "version": "1.9.13",
+  "version": "1.9.14",
   "description": "hyprcrd — self-hosted card manager",
   "main": "main.js",
   "scripts": {