🐛 Keep accented letters in organization avatar initials (#12328)

get-initials used an ASCII-only [a-zA-Z] match, so names like Ábaco
and Órbita skipped the leading accented letter. Match Unicode letters
with \p{L} (CLJS RegExp + u/g flags) so org default avatars match the
expected first letter. Closes #12324.

AI-assisted-by: Cursor <cursoragent@cursor.com>

common/src/app/common/data.cljc

@@ -1202,12 +1202,20 @@
     (str/replace (str s) #"([*_~`\[\]()>#+=\-|{}.!@\\])" (fn [[_ c]] (str "\\" c)))
     ""))
 
+;; \p{L} (Unicode letter) works in Java regex natively, but in JavaScript it
+;; requires the "u" flag which ClojureScript regex literals don't support.
+;; Do not use the "g" flag: a shared global RegExp mutates lastIndex and
+;; corrupts later get-initials calls (org avatar lists in the team switcher).
+(def ^:private letter-re
+  #?(:clj  #"\p{L}"
+     :cljs (js/RegExp. "\\p{L}" "u")))
+
 (defn get-initials
   "Returns up to two uppercase initials extracted from a string.
-  Non-letter prefixes in each token are ignored."
+  Non-letter prefixes in each token are ignored (Unicode letters)."
   [name]
   (->> (str/split (str/trim (or name "")) #"\s+")
-       (keep #(first (re-seq #"[a-zA-Z]" %)))
+       (keep #(re-find letter-re %))
        (take 2)
        (map str/upper)
        (apply str)))

common/test/common_tests/data_test.cljc

@@ -34,7 +34,18 @@
   (t/is (= "AB" (d/get-initials "123 Alpha ## beta")))
   (t/is (= "PD" (d/get-initials "  penpot   design  tool ")))
   (t/is (= "" (d/get-initials nil)))
-  (t/is (= "" (d/get-initials "!!! ???"))))
+  (t/is (= "" (d/get-initials "!!! ???")))
+  ;; Accented / Unicode letters (org default avatars)
+  (t/is (= "Á" (d/get-initials "Ábaco")))
+  (t/is (= "Ó" (d/get-initials "Órbita")))
+  (t/is (= "ÁN" (d/get-initials "Álvaro Núñez")))
+  ;; Sequential calls must stay stable (CLJS global RegExp lastIndex)
+  (t/is (= ["Á" "BB" "JG" "L" "Á"]
+           (mapv d/get-initials ["Ábaco"
+                                 "Black Bird"
+                                 "Jean Grey Academy"
+                                 "Library"
+                                 "Ábaco"]))))
 
 (t/deftest normalize-string-test
   ;; nil input returns empty string