🤖 fix(test): use exact button names in ToggleGroup test to avoid theme toggle collision

The StorybookThemeToggle button text contains 'Dark' and 'Light'
(e.g., '🌙 Dark'), which was causing 'Found multiple elements' errors
when the test used regex matching /dark/i and /light/i.

Using exact name matching ('Dark' vs '🌙 Dark') avoids the collision
while keeping the test focused on the actual ToggleGroup component.

Fixes: ToggleGroup:Two Options dark/light test failures

Author: ethanndickson

src/browser/components/ToggleGroup.stories.tsx

@@ -56,9 +56,9 @@ export const TwoOptions: Story = {
   play: async ({ canvasElement }) => {
     const canvas = within(canvasElement);
 
-    // Find all buttons
-    const lightButton = canvas.getByRole("button", { name: /light/i });
-    const darkButton = canvas.getByRole("button", { name: /dark/i });
+    // Find all buttons - use exact match to avoid collision with theme toggle button
+    const lightButton = canvas.getByRole("button", { name: "Light" });
+    const darkButton = canvas.getByRole("button", { name: "Dark" });
 
     // Initial state - dark should be active
     await expect(darkButton).toHaveAttribute("aria-pressed", "true");