fix: address review-pass findings

- GameView: ignore game keys (Esc/R/U/Z) while the donate modal is open
  so its own Escape no longer doubles as a navigate-to-levels.
- GameView: tag the win dialog with role/aria-modal/aria-labelledby so
  screen readers announce it correctly.
- LevelSelectView: read the progress snapshot once per page render
  instead of two localStorage parses per visible tile (40 reads -> 1).
- progress-store: add snapshot() method for batch reads.
- vite-plugin-pwa: include jpg in the workbox precache glob so the
  donation QR keeps working offline.

src/lib/core/progress-store.js

@@ -46,6 +46,14 @@ export const progressStore = {
         return Object.keys(readRaw().completed).length;
     },
 
+    /**
+     * Returns the full progress snapshot. Lets callers read many levels
+     * without paying for one parse + one localStorage read per query.
+     */
+    snapshot() {
+        return readRaw();
+    },
+
     reset() {
         writeRaw({ completed: {}, bestMoves: {} });
     }

src/views/GameView.svelte

@@ -97,6 +97,9 @@
     let lastKeyAt = 0;
 
     function onKey(e) {
+        // Don't route gameplay keys while the donate modal is open — its own
+        // Escape handler should be the only consumer.
+        if (donateOpen) return;
         if (e.key === 'Escape') { onLevels(); return; }
         if (e.key === 'r' || e.key === 'R') { restart(); return; }
         if (e.key === 'u' || e.key === 'U' || e.key === 'z' || e.key === 'Z') { undo(); return; }
@@ -181,8 +184,8 @@
 
         {#if won}
             <div class="overlay">
-                <div class="dialog">
-                    <h2>LEVEL COMPLETE!</h2>
+                <div class="dialog" role="dialog" aria-modal="true" aria-labelledby="win-title" tabindex="-1">
+                    <h2 id="win-title">LEVEL COMPLETE!</h2>
                     <p class="final">Moves: <strong>{moves}</strong></p>
                     <div class="dialog-actions">
                         {#if hasNext}

src/views/LevelSelectView.svelte

@@ -18,14 +18,16 @@
     let completedCount = $state(progressStore.getCompletedCount());
 
     let visibleLevels = $derived.by(() => {
+        // Read storage once per page render instead of 2× per visible level.
+        const { completed, bestMoves } = progressStore.snapshot();
         const start = page * PER_PAGE;
         const end = Math.min(start + PER_PAGE, total);
         const out = [];
         for (let i = start; i < end; i++) {
             out.push({
                 index: i,
-                done: progressStore.isCompleted(i),
-                best: progressStore.getBestMoves(i)
+                done: !!completed[i],
+                best: bestMoves[i] ?? null
             });
         }
         return out;

vite/config.prod.mjs

@@ -26,7 +26,8 @@ export default defineConfig({
                 ]
             },
             workbox: {
-                globPatterns: ['**/*.{js,css,html,png,svg,webmanifest}']
+                // jpg is needed so the donation QR image works offline.
+                globPatterns: ['**/*.{js,css,html,png,jpg,svg,webmanifest}']
             }
         })
     ]