chore(release): bump version to 1.8.4-alpha

Left uncommitted by an aborted create-release run on 2026-08-19: the
version bump landed in the tree but the release never reached its tag or
manifest. Committing it so the tree is clean before the release is re-cut.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

neode-ui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "neode-ui",
-  "version": "1.8.3-alpha",
+  "version": "1.8.4-alpha",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "neode-ui",
-      "version": "1.8.3-alpha",
+      "version": "1.8.4-alpha",
       "dependencies": {
         "@scure/bip39": "^2.2.0",
         "@types/dompurify": "^3.0.5",