🤖 fix(test-runner): hide theme toggle in stories with play functions to avoid button conflicts

When test-runner executes stories with interaction tests, the manual
StorybookThemeToggle button was appearing alongside component buttons,
causing "Found multiple elements" errors when querying by role.

This adds a check for context.parameters?.play to hide the toggle
button in any story that has an interaction test, preventing button
name collisions (e.g., both ToggleGroup's 'Dark' button and the
toggle's '🌙 Dark' button matching /dark/i).

Fixes: ToggleGroup:Two Options dark/light test failures

Author: ethanndickson

.storybook/preview.tsx

@@ -111,10 +111,12 @@ const preview: Preview = {
     (Story, context) => {
       const mode = context.globals.theme as ThemeMode | undefined;
       const resolved = syncStorybookTheme(mode);
+      // Hide toggle if story has a play function (interaction test) to avoid button conflicts
+      const hasInteractionTest = !!context.parameters?.play;
       return (
         <ThemeProvider>
           <Story />
-          {!mode && !isE2ETestEnv() && (
+          {!mode && !isE2ETestEnv() && !hasInteractionTest && (
             <StorybookThemeToggle initialTheme={resolved} />
           )}
         </ThemeProvider>