refactor: harden mobile editing and PWA caching

scripts/verify-web-performance.mjs

@@ -23,9 +23,17 @@ assert.doesNotMatch(precacheManifest, /\{url:"index\.html",/, "Current HTML must
 assert.match(precacheManifest, /index\.html\?edgeever-offline-shell=/, "PWA must retain a versioned offline HTML shell");
 const optionalDiagramPattern = /(?:beautiful-mermaid|vendor-mermaid|mermaid\.core|[^"']*Diagram-)[^"']*\.js/;
 assert.doesNotMatch(precacheManifest, optionalDiagramPattern, "Optional diagram chunks must remain out of the initial PWA precache");
+assert.doesNotMatch(precacheManifest, /noto-sans-sc-[^"']*\.woff2/, "Print-only Noto Sans SC shards must remain out of the PWA precache");
 
-const entryCount = (precacheManifest.match(/\{url:/g) ?? []).length;
+const precacheURLs = [...precacheManifest.matchAll(/\{url:"([^"]+)"/g)].map((match) => match[1]);
+const entryCount = precacheURLs.length;
 assert.ok(entryCount > 0, "Web service worker precache manifest must not be empty");
+const precacheBytes = precacheURLs
+  .filter((url) => !url.startsWith("/") && !url.includes("?"))
+  .map((url) => statSync(join(distDirectory, url)).size)
+  .reduce((total, size) => total + size, 0);
+const PRECACHE_BUDGET = 5 * 1024 * 1024;
+assert.ok(precacheBytes <= PRECACHE_BUDGET, `PWA precache budget exceeded: ${precacheBytes} > ${PRECACHE_BUDGET}`);
 const modulePreloads = indexHtml.match(/<link rel="modulepreload"[^>]+>/g)?.join("\n") ?? "";
 const initialOptionalPattern = /vendor-code-highlight|vendor-D3|beautiful-mermaid|vendor-(?:mermaid|tiptap|prosemirror|floating)|ui-primitives|mermaid\.core|[^"']*Diagram-/;
 assert.doesNotMatch(modulePreloads, initialOptionalPattern, "Optional editor and diagram chunks must remain out of the initial HTML modulepreload list");
@@ -60,6 +68,8 @@ assert.ok(
 console.log(JSON.stringify({
   ok: true,
   precacheEntries: entryCount,
+  precacheBytes,
+  precacheBudget: PRECACHE_BUDGET,
   initialModulePreloadBytes,
   initialModulePreloadBudget: INITIAL_MODULE_PRELOAD_BUDGET,
   largeDeferredChunks: largeChunks,