fix(know-your-world): allow space in name confirmation input

The name confirmation feature (type first 3 letters) was rejecting
space characters, making it impossible to confirm names like
"New York" or "Sri Lanka".

Updated regex from /[a-z]/i to /[a-z ]/i to allow spaces.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/web/src/arcade-games/know-your-world/components/GameInfoPanel.tsx

@@ -292,12 +292,12 @@ export function GameInfoPanel({
       const expectedLetter = currentRegionName[nextLetterIndex]?.toLowerCase()
       const pressedLetter = e.key.toLowerCase()
 
-      // Only accept single character keys (letters)
-      if (pressedLetter.length === 1 && /[a-z]/i.test(pressedLetter)) {
+      // Only accept single character keys (letters and space)
+      if (pressedLetter.length === 1 && /[a-z ]/i.test(pressedLetter)) {
         if (pressedLetter === expectedLetter) {
           setConfirmedLetterCount((prev) => prev + 1)
         }
-        // Ignore wrong letters silently (no feedback, no backspace needed)
+        // Ignore wrong characters silently (no feedback, no backspace needed)
       }
     }