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/home.html

@@ -0,0 +1,33 @@
+{{define "title"}}Home{{end}}
+{{define "content"}}
+<div class="hero">
+  <h1>T5DE Hub</h1>
+  <p class="lead">Your T5DE account: link your IMVU accounts, see who's online in T5DE, and soon, community products.</p>
+  {{if not .Person}}
+  <div class="actions">
+    <a class="button" href="/signup">Create account</a>
+    <a class="button secondary" href="/signin">Sign in</a>
+  </div>
+  {{end}}
+</div>
+<div class="grid">
+  <div class="panel">
+    <h2>Online in T5DE</h2>
+    <div class="stat">{{.OnlineCount}}</div>
+    <p class="muted small">people showing that they're online. <a href="/online">See who</a></p>
+  </div>
+  {{if .Person}}
+  <div class="panel">
+    <h2>Your IMVU accounts</h2>
+    <div class="stat">{{len .Links}}</div>
+    <p class="muted small">linked. <a href="/account">Manage</a></p>
+  </div>
+  {{else}}
+  <div class="panel">
+    <h2>One account, all your avatars</h2>
+    <p class="muted small">Link any of your IMVU accounts by putting a code in its tagline. Your accounts stay private:
+    nobody else can see they're yours.</p>
+  </div>
+  {{end}}
+</div>
+{{end}}