Release 1.4.0: Windows installer rebuilt, site deployed, 1.3.0 exe and the 0.4.182 graveyard retired from R2

The 1.4.0 Windows build carries everything since 1.3.0: Kimi and Kimi CN as
OpenAI-compatible providers, Kimi Code plan sign-in via the official RFC 8628
device flow with token refresh, and official provider logos bundled into the
app for onboarding and Settings.

Shipping steps, each verified: unit suite green on the release tree -> signed
NSIS build (both humanizer skill variants bundled) -> uploaded to R2 and
probed 200 at full size (102,605,596 bytes) -> manifest bumped (Windows
v1.4.0; macOS stays on its live v1.3.0 DMGs) -> landing e2e 12/12 (PW_CHROME
fallback) -> Pages deployed -> production /api/download 302s to the 1.4.0 exe
and download-stats serves -> superseded 1.3.0 exe deleted (404 confirmed) ->
nine orphaned 0.4.182-era objects (installer, mac zips, blockmaps, stale
electron-updater latest*.yml) purged; publish: null means nothing consumes
them. Bucket now holds exactly the three assets the site links.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "agentcompany-new",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "private": true,
   "type": "module",
   "description": "Enterprise Electron control plane for AI agent companies.",