feat(qualification): add aim trainer restart keybind

src/components/frontend/qualification/AimTrainerGame.tsx

@@ -315,6 +315,11 @@ export function AimTrainerGame({
     }
   }, [resetToReady, startGame]);
 
+  const handleRestartAction = useCallback(() => {
+    if (phaseRef.current !== "playing") return;
+    startGame();
+  }, [startGame]);
+
   const handleShot = useCallback(
     (event: PointerEvent<HTMLCanvasElement>) => {
       if (event.button !== 0 || phaseRef.current !== "playing") return;
@@ -477,6 +482,13 @@ export function AimTrainerGame({
 
     raf = requestAnimationFrame(step);
     const onKeyDown = (event: KeyboardEvent) => {
+      if (event.code === "KeyR") {
+        if (event.repeat || event.ctrlKey || event.metaKey || event.altKey) return;
+        event.preventDefault();
+        event.stopPropagation();
+        handleRestartAction();
+        return;
+      }
       if (event.code !== "Enter" && event.code !== "Space") return;
       if (event.repeat) return;
       event.preventDefault();
@@ -502,6 +514,7 @@ export function AimTrainerGame({
     config.targetLifetimeMs,
     difficulty,
     handlePrimaryAction,
+    handleRestartAction,
     setPhaseSafe,
   ]);