Hub: accounts, IMVU linking by tagline, proxy sign-in, presence, console

People sign up on the website and link IMVU accounts by putting a code in the account's tagline, which the
hub reads from IMVU's public API (the most recent proof wins; link caps per person). IMVU's age verification
or Access Pass make an account adult. T5DE's proxy signs in with a device code and keeps a WebSocket open,
reporting the IMVU account in use and the community products it wears; /online shows those who opted in.
Moderators get a console: who's online, people, link caps, bans, roles, and the audit log. Tests run the
website and API against an embedded Postgres and a fake IMVU API.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

internal/web/templates/layout.html

@@ -0,0 +1,40 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>{{template "title" .}} · T5DE Hub</title>
+<meta name="htmx-config" content='{"includeIndicatorStyles": false}'>
+<link rel="icon" href="/static/favicon.svg" type="image/svg+xml">
+<link rel="stylesheet" href="/static/style.css">
+<script src="/static/htmx.min.js" defer></script>
+</head>
+<body hx-headers='{"X-CSRF-Token": "{{.CSRF}}"}'>
+<header class="top">
+  <div class="wrap">
+    <a class="brand" href="/"><span class="logo">T5DE</span> Hub</a>
+    <nav>
+      <a href="/online"{{if eq .Page "online"}} class="here"{{end}}>Online</a>
+      {{if .Person}}
+        <a href="/account"{{if eq .Page "account"}} class="here"{{end}}>Account</a>
+        {{if .Person.IsModerator}}<a href="/console"{{if eq .Page "console"}} class="here"{{end}}>Console</a>{{end}}
+        <span class="right">
+          <span class="muted small">{{.Person.Username}}</span>
+          <form method="post" action="/signout"><input type="hidden" name="csrf" value="{{.CSRF}}"><button class="secondary">Sign out</button></form>
+        </span>
+      {{else}}
+        <span class="right">
+          <a href="/signin">Sign in</a>
+          <a class="button" href="/signup">Create account</a>
+        </span>
+      {{end}}
+    </nav>
+  </div>
+</header>
+<main class="wrap">
+  {{if .Flash}}<div class="flash">{{.Flash}}</div>{{end}}
+  {{template "content" .}}
+</main>
+<footer class="wrap muted">T5DE is unofficial: not made by or affiliated with IMVU.</footer>
+</body>
+</html>