fix(30408): improve error message for labels used before definition

The error message 'Jump target cannot cross function boundary' was confusing
because it didn't indicate which label was causing the issue. This change
adds the label name to the error message when available.

Before: 'Jump target cannot cross function boundary.'
After:  'Jump target 'loopend' cannot cross function boundary.'

Fixes #30408

Author: wdsmini

src/compiler/checker.ts

@@ -53030,7 +53030,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         let current: Node = node;
         while (current) {
             if (isFunctionLikeOrClassStaticBlockDeclaration(current)) {
-                return grammarErrorOnNode(node, Diagnostics.Jump_target_cannot_cross_function_boundary);
+                return grammarErrorOnNode(node, Diagnostics.Jump_target_0_cannot_cross_function_boundary, node.label ? node.label.text : "");
             }
 
             switch (current.kind) {

src/compiler/diagnosticMessages.json

@@ -307,6 +307,10 @@
         "category": "Error",
         "code": 1107
     },
+    "Jump target '{0}' cannot cross function boundary.": {
+        "category": "Error",
+        "code": 1107
+    },
     "A 'return' statement can only be used within a function body.": {
         "category": "Error",
         "code": 1108