better markdown support, minor layout fixes

package.json

@@ -57,6 +57,7 @@
 		"@trpc/next": "^11.3.1",
 		"@trpc/react-query": "^11.3.1",
 		"@trpc/server": "^11.3.1",
+		"@uiw/react-md-editor": "^4.0.7",
 		"class-variance-authority": "^0.7.1",
 		"clsx": "^2.1.1",
 		"cmdk": "^1.1.1",
@@ -79,6 +80,7 @@
 		"react-markdown": "^10.1.0",
 		"react-resizable-panels": "^3.0.2",
 		"recharts": "^2.15.3",
+		"rehype-highlight": "^7.0.2",
 		"rehype-raw": "^7.0.0",
 		"server-only": "^0.0.1",
 		"sonner": "^2.0.5",