fix: improve robustness of search focus keyboard shortcut

- Update FontSelector to prevent '/' shortcut from triggering when another input is focused
- Ensure consistent behavior for '/' focus across Figlet and Units tools

components/figlet/FontSelector.tsx

@@ -45,9 +45,15 @@ export function FontSelector({
     const handleKeyDown = (e: KeyboardEvent) => {
       // "/" to focus search
       if (e.key === '/' && !e.ctrlKey && !e.metaKey) {
+        const activeElement = document.activeElement;
+        if (
+          activeElement?.tagName !== 'INPUT' &&
+          activeElement?.tagName !== 'TEXTAREA'
+        ) {
           e.preventDefault();
           searchInputRef.current?.focus();
         }
+      }
       // "Esc" to clear search
       if (e.key === 'Escape' && searchQuery) {
         e.preventDefault();