phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

tests/development/test_null_literal_main.hako

@@ -0,0 +1,32 @@
+// 🧪 Null Literal Support Test
+
+static box Main {
+    init { console }
+    
+    main() {
+        me.console = new ConsoleBox()
+        me.console.log("🧪 Testing Null Literal Support")
+        
+        // Test 1: Basic null assignment
+        local null_value = null
+        me.console.log("Null value: " + null_value)
+        
+        // Test 2: Non-null assignment
+        local non_null_value = "not null"
+        me.console.log("Non-null value: " + non_null_value)
+        
+        // Test 3: Null comparison (if supported)
+        me.console.log("Testing null comparison...")
+        
+        // Note: Comparison operators might not be fully working yet
+        // Let's try basic null usage
+        me.console.log("Null variable type: " + null_value.type_name())
+        
+        // Test 4: Null in string concatenation
+        local concat_test = "Value is: " + null_value
+        me.console.log("Concatenation with null: " + concat_test)
+        
+        me.console.log("✅ Null literal parsing works!")
+        return "Null literal test complete"
+    }
+}