Add handling for new node kinds in visitors

The `analyzer.rs` and `lambda_collector.rs` files have been updated to
correctly traverse and process new node kinds in the Abstract Syntax
Tree (AST). This ensures that these new node types are properly included
in the analysis and lambda collection phases of the compiler.

src/ast/compiler/analyzer.rs

@@ -369,7 +369,25 @@ impl NodeExt for NodeKind<TypedPhase> {
             NodeKind::Expansion { expanded, .. } => {
                 f(expanded);
             }
-            _ => {}
+            NodeKind::Again { args } => {
+                f(args);
+            }
+            NodeKind::MacroDecl { params, body, .. } => {
+                f(params);
+                f(body);
+            }
+            NodeKind::Template(inner)
+            | NodeKind::Placeholder(inner)
+            | NodeKind::Splice(inner) => {
+                f(inner);
+            }
+            // Leaf nodes — no children to visit.
+            NodeKind::Nop
+            | NodeKind::Constant(_)
+            | NodeKind::Identifier { .. }
+            | NodeKind::FieldAccessor(_)
+            | NodeKind::Error
+            | NodeKind::Extension(_) => {}
         }
     }
 }

src/ast/compiler/lambda_collector.rs

@@ -104,8 +104,28 @@ where
             NodeKind::Expansion { expanded, .. } => {
                 self.visit(expanded);
             }
-
-            _ => {} // Leaf nodes
+            NodeKind::GetField { rec, .. } => {
+                self.visit(rec);
+            }
+            NodeKind::Again { args } => {
+                self.visit(args);
+            }
+            NodeKind::MacroDecl { params, body, .. } => {
+                self.visit(params);
+                self.visit(body);
+            }
+            NodeKind::Template(inner)
+            | NodeKind::Placeholder(inner)
+            | NodeKind::Splice(inner) => {
+                self.visit(inner);
+            }
+            // Leaf nodes — no children to visit.
+            NodeKind::Nop
+            | NodeKind::Constant(_)
+            | NodeKind::Identifier { .. }
+            | NodeKind::FieldAccessor(_)
+            | NodeKind::Error
+            | NodeKind::Extension(_) => {}
         }
     }
 }