Splash over the empty shell on sign-in; extension v0.2.1 catches submit() logins ...

- App.vue gates on auth state: 'checking' renders a logo + spinner card
  until /me answers, so the shell never flashes empty before the
  sign-in screen appears; 'denied' -> sign-in card, 'ready' -> app.
- content.js: DLE-style <button onclick="submit();"> calls
  form.submit(), which fires no submit event - the login form's
  interceptor stayed silent (animaunt.org regression). Capture happens
  on the submit-button click and Enter too; duplicate captures within
  1.5s with identical credentials are dropped. Verified end-to-end on
  animaunt.org: modal login -> popup save card -> vault entry.
- Release 0.2.1: Makefile + extension manifest bumped, zips rebuilt
  and hashed into the deploy manifest for the download page.

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

Serve 0.2.0 extension builds from the download page ...

extensions/manifest.json advertised the 0.2.0 filenames while the served
extensions/dist still held the 0.1.1 zips — the page filtered unknown
files and shipped an empty build list, so download buttons never
appeared. Ship the current 0.2.0 builds and refresh their sha256/size,
drop the 0.1.1 zips.

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

Release extension 0.1.1: kit 1.0 lib, shield logo icons ...

Rebuild both browsers' packages against gnexus-ui-kit 1.0 (make lib
from frontend/node_modules) and swap the generic dots mark for the
shield keyhole logo rasterized from frontend/public/logo.svg
(icon.svg + 16/32/48/128 PNG rsvg-convert). Popup verified in
chromium: settings drawer and secrets list render with no page errors.
Version bumped in extension manifest + Makefile; extensions/manifest.json
points at the 0.1.1 zips with fresh sha256/size (0.1.0 zips removed).

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

Refresh extension builds (split Chrome/Firefox) ...

Repackage the Chrome and Firefox builds from the extension repo and
update extensions/manifest.json checksums, sizes, and release date.

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

Add in-app extension download page ...

Distribute the gnexus-creds browser extension from the service itself.
Package Chrome and Firefox builds into extensions/dist/ with a manifest
describing version, checksums, and sizes; serve them via authenticated
FastAPI endpoints and surface a new Extension tab in the Vue UI with
download cards, SHA-256, and install instructions.

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