Fix enum member emit for escaped identifiers (#4107)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>

Author: Copilot

internal/transformers/tstransforms/runtimesyntax.go

@@ -196,7 +196,7 @@ func (tx *RuntimeSyntaxTransformer) getExpressionForPropertyName(member *ast.Enu
 		// enums don't support computed properties so we always generate the 'expression' part of the name as-is.
 		return tx.Visitor().VisitNode(n.Expression)
 	case ast.KindIdentifier:
-		return tx.Factory().NewStringLiteralFromNode(name)
+		return tx.Factory().NewStringLiteral(name.Text(), ast.TokenFlagsNone)
 	case ast.KindStringLiteral: // !!! propagate token flags (will produce new diffs)
 		return tx.Factory().NewStringLiteral(name.Text(), ast.TokenFlagsNone)
 	case ast.KindNumericLiteral:

testdata/baselines/reference/compiler/enumUnicodeEscapeMemberName.js

@@ -0,0 +1,16 @@
+//// [tests/cases/compiler/enumUnicodeEscapeMemberName.ts] ////
+
+//// [enumUnicodeEscapeMemberName.ts]
+enum E {
+  \u0041 = 1,
+}
+const a = E.A;
+
+
+//// [enumUnicodeEscapeMemberName.js]
+"use strict";
+var E;
+(function (E) {
+    E[E["A"] = 1] = "A";
+})(E || (E = {}));
+const a = E.A;

testdata/baselines/reference/compiler/enumUnicodeEscapeMemberName.symbols

@@ -0,0 +1,15 @@
+//// [tests/cases/compiler/enumUnicodeEscapeMemberName.ts] ////
+
+=== enumUnicodeEscapeMemberName.ts ===
+enum E {
+>E : Symbol(E, Decl(enumUnicodeEscapeMemberName.ts, 0, 0))
+
+  \u0041 = 1,
+>\u0041 : Symbol(E[\u0041], Decl(enumUnicodeEscapeMemberName.ts, 0, 8))
+}
+const a = E.A;
+>a : Symbol(a, Decl(enumUnicodeEscapeMemberName.ts, 3, 5))
+>E.A : Symbol(E[\u0041], Decl(enumUnicodeEscapeMemberName.ts, 0, 8))
+>E : Symbol(E, Decl(enumUnicodeEscapeMemberName.ts, 0, 0))
+>A : Symbol(E[\u0041], Decl(enumUnicodeEscapeMemberName.ts, 0, 8))
+

testdata/baselines/reference/compiler/enumUnicodeEscapeMemberName.types

@@ -0,0 +1,16 @@
+//// [tests/cases/compiler/enumUnicodeEscapeMemberName.ts] ////
+
+=== enumUnicodeEscapeMemberName.ts ===
+enum E {
+>E : E
+
+  \u0041 = 1,
+>\u0041 : E.A
+>1 : 1
+}
+const a = E.A;
+>a : E.A
+>E.A : E
+>E : typeof E
+>A : E
+

testdata/tests/cases/compiler/enumUnicodeEscapeMemberName.ts

@@ -0,0 +1,4 @@
+enum E {
+  \u0041 = 1,
+}
+const a = E.A;