HTML-decode tag names in getCleanedTagName for consistent display

Add Str.htmlDecode to getCleanedTagName so all tag display surfaces
(picker, workspace list, edit screens, search filters, group headers,
modified-expense messages, sidebar previews) render decoded entities
like R&D instead of raw R&D. Mirrors how getDecodedCategoryName
handles categories in CategoryUtils.

Co-authored-by: Abdelrahman Khattab <abzokhattab@users.noreply.github.com>

Author: MelvinBot

src/libs/PolicyUtils.ts

@@ -857,10 +857,11 @@ function getTagNamesFromTagsLists(policyTagLists: PolicyTagLists): string[] {
 }
 
 /**
- * Cleans up escaping of colons (used to create multi-level tags, e.g. "Parent: Child") in the tag name we receive from the backend
+ * Cleans up escaping of colons (used to create multi-level tags, e.g. "Parent: Child") in the tag name we receive from the backend,
+ * and HTML-decodes the result so tags stored with encoded entities (e.g. `R&D`) render as `R&D`.
  */
 function getCleanedTagName(tag: string) {
-    return tag?.replaceAll('\\:', CONST.COLON);
+    return Str.htmlDecode(tag?.replaceAll('\\:', CONST.COLON) ?? '');
 }
 
 /**