Precompress ExifTool WASM with Brotli and serve via nginx brotli_static.

Tor first loads drop from ~25 MB raw to ~5 MB on the wire; prod build writes .wasm.br sidecars and Alpine nginx serves them under /assets with long-lived cache.

frontend/package.json

@@ -8,6 +8,7 @@
         "build": "vue-tsc -b && vite build",
         "preview": "vite preview",
         "test": "vitest run",
+        "optimize-dist-wasm": "node scripts/optimize-dist-wasm.mjs",
         "postinstall": "node patches/patch-exiftool-stderr.mjs && node patches/patch-zeroperl-worker-fetch.mjs"
     },
     "dependencies": {

frontend/scripts/optimize-dist-wasm.mjs

@@ -0,0 +1,32 @@
+import { brotliCompressSync, constants as zlibConstants } from 'node:zlib';
+import { readdirSync, readFileSync, writeFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const distAssetsDir = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '../dist/assets');
+
+const brotliOptions = {
+    params: {
+        [zlibConstants.BROTLI_PARAM_QUALITY]: 11,
+        [zlibConstants.BROTLI_PARAM_LGWIN]: 24
+    }
+};
+
+const wasmFiles = readdirSync(distAssetsDir).filter(name => name.endsWith('.wasm'));
+
+if (wasmFiles.length === 0) {
+    console.error('optimize-dist-wasm: no .wasm files in dist/assets');
+    process.exit(1);
+}
+
+console.log('optimize-dist-wasm: brotli sidecars for', wasmFiles.length, 'file(s)');
+
+for (const fileName of wasmFiles) {
+    const wasmPath = path.join(distAssetsDir, fileName);
+    console.log('optimize-dist-wasm: brotli', wasmPath);
+
+    const compressed = brotliCompressSync(readFileSync(wasmPath), brotliOptions);
+    console.log('optimize-dist-wasm: compressed', compressed.length);
+
+    writeFileSync(`${wasmPath}.br`, compressed);
+}