Embed logo as base64 data URI instead of relative asset path

Fixes the logo not displaying when the file is copied/downloaded
standalone (e.g. the Nextcloud snapshot), since it no longer depends
on an assets/ folder sitting alongside it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

index.html

@@ -502,7 +502,7 @@
 <body>
 
   <div class="sidebar">
-    <img class="logo" src="assets/txp_logo_vertical.png" alt="TXproducts" />
+    <img class="logo" src="data:image/png;base64,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 truncated
     <div class="wordmark">
       <div class="brand">Sales &amp; Marketing</div>
       <div class="brand-sub">Department</div>