🐛 Fix app freeze on token name change (#8214)

CHANGES.md

@@ -37,7 +37,7 @@
 - Fix unhandled exception on open-new-window helper [Github #7787](https://github.com/penpot/penpot/issues/7787)
 - Fix incorrect handling of input values on layout gap and padding inputs [Github #8113](https://github.com/penpot/penpot/issues/8113)
 - Fix several race conditions on path editor [Github #8187](https://github.com/penpot/penpot/pull/8187)
-
+- Fix app freeze when introducing an error on a very long token name [Taiga #13214](https://tree.taiga.io/project/penpot/issue/13214)
 
 ## 2.12.1
 

common/src/app/common/types/token.cljc

@@ -99,7 +99,7 @@
 
 (def token-name-ref
   [:re {:title "TokenNameRef" :gen/gen sg/text}
-   #"^(?!\$)([a-zA-Z0-9-$_]+\.?)*(?<!\.)$"])
+   #"^[a-zA-Z0-9_-][a-zA-Z0-9$_-]*(\.[a-zA-Z0-9$_-]+)*$"])
 
 (def ^:private schema:color
   [:map