Hotfix for labels on symbols (#6015)

crates/typst-realize/src/lib.rs

@@ -326,7 +326,10 @@ fn visit_math_rules<'a>(
         // Symbols in non-math content transparently convert to `TextElem` so we
         // don't have to handle them in non-math layout.
         if let Some(elem) = content.to_packed::<SymbolElem>() {
-            let text = TextElem::packed(elem.text).spanned(elem.span());
+            let mut text = TextElem::packed(elem.text).spanned(elem.span());
+            if let Some(label) = elem.label() {
+                text.set_label(label);
+            }
             visit(s, s.store(text), styles)?;
             return Ok(true);
         }

tests/suite/symbols/symbol.typ

@@ -151,3 +151,7 @@
 --- symbol-sect-deprecated ---
 // Warning: 5-9 `sect` is deprecated, use `inter` instead
 $ A sect B = A inter B $
+
+--- issue-5930-symbol-label ---
+#emoji.face<lab>
+#context test(query(<lab>).first().text, "😀")