The Loyaly mark everywhere a person sees the product

Brand assets in brand/ (the 512px mark, sizes for each surface, a
multi-size .ico). Windows executables carry it as a compiled-in
resource (rsrc_windows_amd64.syso from go-winres) so Explorer, the
taskbar and the installer show it; installer/build.ps1 therefore uses a
plain go build rather than wails build, which would add a second copy
and fail the link. The tray icon is the mark with a state dot over its
corner - a plain coloured circle read as a generic status light among
other icons - rendered from the embedded PNG at 32px so it survives
150% scaling. The desktop app's login, setup and sidebar marks, the
head-office web app's mark and favicon, and the engine dashboard's
favicon are the same file.

Also found while packaging: no wheel so far shipped static/, so the
engine's own dashboard at :8010 on a Windows source install would have
failed with a missing file. package-data now includes it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KGcjxF1cNLcuwc3DAPcnfj

desktop/frontend/src/views/Setup.jsx

@@ -1,6 +1,7 @@
 import { useState } from 'react'
 import { api, message } from '../bridge.js'
 import * as Icon from '../ui/icons.jsx'
+import logo from '../assets/loyaly-mark.png'
 
 // Linking this PC to a shop — the first thing that happens on a new install,
 // and until now the one thing the app could not do.
@@ -42,7 +43,7 @@ export default function Setup({ onDone, onCancel }) {
   return (
     <div className="login">
       <div className="box">
-        <span className="mark"><Icon.Link size={20} /></span>
+        <span className="mark"><img src={logo} alt="" /></span>
         <h1>{onCancel ? 'Link to head office' : 'Set up this PC'}</h1>
         <p className="lead">
           Type the installation code for this shop. You only do this once.