fix(parser): extract all names from grouped var/const specs

extractGoVarConst used ChildByFieldName("name"), which returns only the first name field, so 'var a, b = 1, 2' and 'const ( C, D = 3, 4 )' surfaced only a/C. Iterate every "name"-field child so each declared identifier becomes its own symbol. Adds TestExtractGoVarConstMultiName.

internal/parser/symbols.go

@@ -152,12 +152,20 @@ func extractGoVarConst(n *sitter.Node, content []byte, filename string) []protoc
 
 	WalkTree(n, func(node *sitter.Node) bool {
 		if node.Type() == "const_spec" || node.Type() == "var_spec" {
-			nameNode := node.ChildByFieldName("name")
+			// A spec may declare multiple names (e.g. var a, b = 1, 2);
-			if nameNode != nil {
+			// ChildByFieldName returns only the first, so iterate all "name" fields.
+			for i := 0; i < int(node.ChildCount()); i++ {
+				if node.FieldNameForChild(i) != "name" {
+					continue
+				}
+				nameNode := node.Child(i)
+				if nameNode == nil {
+					continue
+				}
 				symbols = append(symbols, protocol.Symbol{
 					Name:     GetNodeText(nameNode, content),
 					Kind:     kind,
-					Location: NodeLocation(node, filename),
+					Location: NodeLocation(nameNode, filename),
 				})
 			}
 		}

internal/parser/symbols_test.go

@@ -123,6 +123,44 @@ var globalVar = "test"
 	}
 }
 
+// Grouped var/const specs declare multiple names on one spec (var a, b = 1, 2);
+// every name must surface as its own symbol, not just the first.
+func TestExtractGoVarConstMultiName(t *testing.T) {
+	r := NewRegistry()
+	defer r.Close()
+
+	content := `package main
+
+var a, b = 1, 2
+
+const (
+	C, D = 3, 4
+)
+`
+	ctx := context.Background()
+	result, err := r.Parse(ctx, "test.go", []byte(content))
+	if err != nil {
+		t.Fatalf("parse failed: %v", err)
+	}
+
+	symbols := ExtractSymbols(result.Tree, []byte(content), protocol.LangGo, "test.go")
+	want := map[string]protocol.SymbolKind{
+		"a": protocol.SymbolVariable,
+		"b": protocol.SymbolVariable,
+		"C": protocol.SymbolConstant,
+		"D": protocol.SymbolConstant,
+	}
+	got := make(map[string]protocol.SymbolKind)
+	for _, sym := range symbols {
+		got[sym.Name] = sym.Kind
+	}
+	for name, kind := range want {
+		if got[name] != kind {
+			t.Errorf("symbol %q: got kind %q, want %q (symbols: %+v)", name, got[name], kind, symbols)
+		}
+	}
+}
+
 func TestExtractJSSymbols(t *testing.T) {
 	r := NewRegistry()
 	defer r.Close()