fix: remove test settings from production schema

Remove 5 test setting IDs that were incorrectly added to the production
apiSchema.ts. Test settings now use `as TestSettingId` casts in test
files instead of polluting the production Settings type.

Changes:
- Remove TestSetting, TestHiddenSetting, TestDeprecatedSetting,
  TestVisibleSetting, Comfy.TestSetting from apiSchema.ts
- Add TestSettingId type helper to extensionAPI.spec.ts and
  useSettingSearch.spec.ts
- Use specific `as TestSettingId` casts with explanatory comments

This keeps production types clean while allowing tests to register
arbitrary setting IDs (which is valid extension behavior).

Amp-Thread-ID: https://ampcode.com/threads/T-019c1833-2352-728b-a523-a8f440fd3ba1
Co-authored-by: Amp <amp@ampcode.com>

browser_tests/tests/extensionAPI.spec.ts

@@ -1,8 +1,17 @@
 import { expect } from '@playwright/test'
 
+import type { Settings } from '../../src/schemas/apiSchema'
 import type { SettingParams } from '../../src/platform/settings/types'
 import { comfyPageFixture as test } from '../fixtures/ComfyPage'
 
+/**
+ * Type helper for test settings with arbitrary IDs.
+ * Extensions can register settings with any ID, but SettingParams.id
+ * is typed as keyof Settings for autocomplete. This helper allows
+ * arbitrary IDs in tests while keeping type safety for other fields.
+ */
+type TestSettingId = keyof Settings
+
 test.describe('Topbar commands', () => {
   test.beforeEach(async ({ comfyPage }) => {
     await comfyPage.settings.setSetting('Comfy.UseNewMenu', 'Top')
@@ -87,7 +96,8 @@ test.describe('Topbar commands', () => {
           name: 'TestExtension1',
           settings: [
             {
-              id: 'TestSetting',
+              // Extensions can register arbitrary setting IDs
+              id: 'TestSetting' as TestSettingId,
               name: 'Test Setting',
               type: 'text',
               defaultValue: 'Hello, world!',
@@ -117,7 +127,8 @@ test.describe('Topbar commands', () => {
           name: 'TestExtension1',
           settings: [
             {
-              id: 'Comfy.TestSetting',
+              // Extensions can register arbitrary setting IDs
+              id: 'Comfy.TestSetting' as TestSettingId,
               name: 'Test Setting',
               type: 'boolean',
               defaultValue: false,
@@ -202,7 +213,8 @@ test.describe('Topbar commands', () => {
               name: 'TestExtension1',
               settings: [
                 {
-                  id: 'Comfy.TestSetting',
+                  // Extensions can register arbitrary setting IDs
+                  id: 'Comfy.TestSetting' as TestSettingId,
                   name: 'Test',
                   attrs: { disabled: true },
                   ...config