v0.3.2 — commit/submit progress, cancel, thumbnails, waitlist landing+admin

Client:
- Commit: batch `p4 reopen` so huge changelists (63k+) no longer blow the
  Windows command-line limit; live "N / total" progress + spinner during commit.
- Submit dialog: white arrow, "N of total" + % bar, running file log,
  Cancel button (aborts pre-commit; changelist stays pending).
- Disk scan: streaming reconcile with a live "found N files" counter + Cancel.
- Thumbnails: only decode browser-renderable image formats; glyph fallback
  (+ onError) instead of a broken-image icon for bmp/tga/dds/etc.

Landing + waitlist:
- waitlist-server: Express + SQLite email collector (dedup) with a secure
  admin panel (scrypt auth, rate-limited login, signed cookies) and CSV export.
- landing form now POSTs signups to the waitlist API.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "exbyte-depot",
   "private": true,
-  "version": "0.3.1",
+  "version": "0.3.2",
   "type": "module",
   "scripts": {
     "dev": "vite",