fix: stop ComfyUI from loading the admin bundle into the canvas page

WEB_DIRECTORY = "web" made ComfyUI inject every .js under web/ (admin.js,
gallery.js, vendored Tailwind and ViewerJS) into the canvas page. The node
extension moves to web/comfy/prompt_manager.js (content unchanged; its
../../scripts/app.js import resolves against the served URL, which is the
same) and WEB_DIRECTORY points at that folder only. Admin and gallery assets
are still served from web/ by the extension's own routes.

tests/test_sort_contract.py still reads web/prompt_manager.js and must be
updated to the new path by its owner.

__init__.py

@@ -53,8 +53,10 @@ NODE_DISPLAY_NAME_MAPPINGS = {
     "PromptSearchList": "Prompt Search List",
 }
 
-# Define path to web directory for UI components
-WEB_DIRECTORY = "web"
+# Canvas extension only. ComfyUI loads every .js under this directory into the
+# canvas page, so the admin/gallery bundles and vendored libraries under web/
+# are served by our own routes instead (see py/api).
+WEB_DIRECTORY = "web/comfy"
 
 # Add API routes (same pattern as ComfyUI_Assets)
 try:

tests/test_extension_web_dir.py

@@ -0,0 +1,64 @@
+"""ComfyUI loads only the canvas extension, not the admin or gallery bundles.
+
+ComfyUI serves every .js file under WEB_DIRECTORY into the canvas page, so the
+directory must hold nothing but the node extension.
+"""
+
+import os
+import sys
+import tempfile
+import unittest
+
+TESTS_DIR = os.path.dirname(os.path.abspath(__file__))
+ROOT = os.path.dirname(TESTS_DIR)
+sys.path.insert(0, ROOT)
+sys.path.insert(0, TESTS_DIR)
+
+from test_init_package import load_package  # noqa: E402
+
+
+class TestExtensionWebDir(unittest.TestCase):
+    package_name = "prompt_manager_pkg_web"
+
+    @classmethod
+    def setUpClass(cls):
+        cls.tmp = tempfile.TemporaryDirectory()
+        output_dir = os.path.join(cls.tmp.name, "output")
+        os.makedirs(output_dir)
+        cls.package, _ = load_package(
+            cls.package_name, os.path.join(cls.tmp.name, "prompts.db"), output_dir
+        )
+
+    @classmethod
+    def tearDownClass(cls):
+        monitor = getattr(cls.package, "_global_image_monitor", None)
+        if monitor is not None:
+            monitor.stop_monitoring()
+        sys.modules.pop(cls.package_name, None)
+        cls.tmp.cleanup()
+
+    def test_web_directory_is_the_canvas_extension_folder(self):
+        self.assertEqual(self.package.WEB_DIRECTORY, "web/comfy")
+        self.assertIn("WEB_DIRECTORY", self.package.__all__)
+
+    def test_comfyui_resolves_the_folder_next_to_the_package(self):
+        # ComfyUI joins the module directory with WEB_DIRECTORY and checks isdir
+        folder = os.path.join(ROOT, self.package.WEB_DIRECTORY)
+        self.assertTrue(os.path.isdir(folder))
+        self.assertEqual(sorted(os.listdir(folder)), ["prompt_manager.js"])
+
+    def test_extension_was_moved_not_copied(self):
+        self.assertFalse(os.path.exists(os.path.join(ROOT, "web", "prompt_manager.js")))
+
+    def test_extension_registers_with_the_canvas_app(self):
+        path = os.path.join(ROOT, "web", "comfy", "prompt_manager.js")
+        with open(path, encoding="utf-8") as f:
+            source = f.read()
+        self.assertIn("app.registerExtension(", source)
+        # Served at /extensions/<name>/prompt_manager.js, so ComfyUI's app module
+        # is two levels up regardless of where the file lives on disk.
+        self.assertIn('from "../../scripts/app.js"', source)
+
+
+if __name__ == "__main__":
+    unittest.main()