Enable noUncheckedIndexedAccess; guard touch-event index access (#60)

Signed-off-by: Will Manning <will@willmanning.io>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: lwwmanning

src/components/hero-404/index.tsx

@@ -218,8 +218,10 @@ void main() {
         e.preventDefault();
       }
 
-      const touchX = e.touches[0].clientX;
-      const touchY = e.touches[0].clientY;
+      const touch = e.touches[0];
+      if (!touch) return;
+      const touchX = touch.clientX;
+      const touchY = touch.clientY;
 
       const x = (touchX / window.innerWidth) * 2 - 1;
       const y = (touchY / window.innerHeight) * 2 - 1;

src/components/hero/index.tsx

@@ -227,8 +227,10 @@ void main() {
         e.preventDefault();
       }
 
-      const touchX = e.touches[0].clientX;
-      const touchY = e.touches[0].clientY;
+      const touch = e.touches[0];
+      if (!touch) return;
+      const touchX = touch.clientX;
+      const touchY = touch.clientY;
 
       const x = (touchX / window.innerWidth) * 2 - 1;
       const y = (touchY / window.innerHeight) * 2 - 1;

tsconfig.json

@@ -13,6 +13,7 @@
     "moduleResolution": "bundler",
     "noUnusedLocals": true,
     "noUnusedParameters": true,
+    "noUncheckedIndexedAccess": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
     "jsx": "react-jsx",