zip download of single pdfs

package-lock.json

@@ -1,13 +1,14 @@
 {
   "name": "pdf-tools",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "pdf-tools",
-      "version": "0.2.2",
+      "version": "0.3.1",
       "dependencies": {
+        "fflate": "^0.8.3",
         "pdf-lib": "^1.17.1",
         "pdfjs-dist": "^5.7.284",
         "react": "^19.2.6",
@@ -2526,6 +2527,12 @@
         }
       }
     },
+    "node_modules/fflate": {
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.8.3.tgz",
+      "integrity": "sha512-tbZNuJrLwGUp3zshBtdy4W+ORxZuIh8a5ilyIEQDC5rY1f3U20JMry0Ll3WBzU58EZKsEuJFXhb5gwv8CsPvgA==",
+      "license": "MIT"
+    },
     "node_modules/file-entry-cache": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-8.0.0.tgz",