test(wpmc S4): WP_Query stub + wp_query globals cleanup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/TestCase.php

@@ -24,7 +24,12 @@ abstract class TestCase extends BaseTestCase
 
     protected function tearDown(): void
     {
-        unset($_SERVER['REQUEST_URI']);
+        unset(
+            $_SERVER['REQUEST_URI'],
+            $GLOBALS['wp_query'],
+            $GLOBALS['wp_the_query'],
+            $GLOBALS['post']
+        );
         Monkey\tearDown();
         parent::tearDown();
     }

tests/bootstrap.php

@@ -13,3 +13,15 @@ require_once __DIR__ . '/../includes/class-plugin.php';
 if (!class_exists('WP_Term', false)) {
     eval('class WP_Term { public int $term_id = 0; public string $slug = ""; public string $taxonomy = ""; }');
 }
+
+if (!class_exists('WP_Query', false)) {
+    eval('class WP_Query {
+        public array $constructor_args = [];
+        public bool $is_page = false;
+        public bool $is_front_page = false;
+        public bool $is_404 = false;
+        public function __construct($args = []) { $this->constructor_args = is_array($args) ? $args : []; }
+        public function set_404(): void { $this->is_404 = true; }
+        public function set($k, $v): void {}
+    }');
+}