Update version badges from v4.0 to v4.1

- Update all v4.0 badges to v4.1 across templates
- Add cute v4.1 badge under Stegasoo title in navbar

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontends/web/templates/about.html

@@ -65,7 +65,7 @@
                             <li class="mb-2">
                                 <i class="bi bi-check-circle text-success me-2"></i>
                                 <strong>Channel Keys</strong>
-                                <span class="badge bg-info ms-1">v4.0</span>
+                                <span class="badge bg-info ms-1">v4.1</span>
                                 <br><small class="text-muted">Group/deployment isolation</small>
                             </li>
                         </ul>
@@ -250,7 +250,7 @@
             <div class="card-header">
                 <h5 class="mb-0">
                     <i class="bi bi-broadcast me-2"></i>Channel Keys
-                    <span class="badge bg-info ms-2">v4.0</span>
+                    <span class="badge bg-info ms-2">v4.1</span>
                 </h5>
             </div>
             <div class="card-body">

frontends/web/templates/base.html

@@ -14,7 +14,10 @@
         <div class="container">
             <a class="navbar-brand d-flex align-items-center" href="/">
                 <img src="{{ url_for('static', filename='logo.svg') }}" alt="Stegasoo" height="36" class="me-2">
+                <span style="position: relative; display: inline-block; margin-top: -14px;">
                     <span class="fw-bold title-gold">Stegasoo</span>
+                    <span class="badge bg-success" style="position: absolute; font-size: 0.45rem; bottom: -8px; right: 6px;">v4.1</span>
+                </span>
             </a>
             <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
                 <span class="navbar-toggler-icon"></span>

frontends/web/templates/decode.html

@@ -344,7 +344,7 @@
                           <div class="security-box h-100">
                             <label class="form-label">
                                 <i class="bi bi-broadcast me-1"></i> Channel
-                                <span class="badge bg-info ms-1">v4.0</span>
+                                <span class="badge bg-info ms-1">v4.1</span>
                                 <a href="/about#channel-keys" class="text-muted ms-1" title="Learn about channels"><i class="bi bi-info-circle"></i></a>
                             </label>
 

frontends/web/templates/encode.html

@@ -411,7 +411,7 @@
                           <div class="security-box h-100">
                             <label class="form-label">
                                 <i class="bi bi-broadcast me-1"></i> Channel
-                                <span class="badge bg-info ms-1">v4.0</span>
+                                <span class="badge bg-info ms-1">v4.1</span>
                                 <a href="/about#channel-keys" class="text-muted ms-1" title="Learn about channels"><i class="bi bi-info-circle"></i></a>
                             </label>
 

frontends/web/templates/index.html

@@ -11,7 +11,7 @@
             <div style="margin-bottom: 40px;">
                 <h1 class="display-4 fw-bold mb-2 title-gold">
                     Stegasoo
-                    <span class="badge bg-success fs-6 ms-2">v4.0</span>
+                    <span class="badge bg-success fs-6 ms-2">v4.1</span>
                 </h1>
                 <p class="lead text-muted mb-0">Hide encrypted data in plain sight.</p>
             </div>
@@ -162,7 +162,7 @@
                     <li class="mb-1">
                         <i class="bi bi-broadcast text-success me-2"></i>
                         <strong>Channel keys</strong> for group isolation
-                        <span class="badge bg-info ms-1">v4.0</span>
+                        <span class="badge bg-info ms-1">v4.1</span>
                     </li>
                 </ul>
             </div>