diff --git a/modules/boersenchecker/assets/boersenchecker.css b/modules/boersenchecker/assets/boersenchecker.css
index da5ab8dd..a1749399 100644
--- a/modules/boersenchecker/assets/boersenchecker.css
+++ b/modules/boersenchecker/assets/boersenchecker.css
@@ -12,6 +12,63 @@
   color: var(--bc-text);
 }
 
+.bc-frame {
+  height: 100%;
+  min-height: 0;
+}
+
+.bc-sidebar {
+  gap: 0;
+}
+
+.bc-brand {
+  margin-bottom: 18px;
+}
+
+.bc-nav-list {
+  gap: 12px;
+}
+
+.bc-nav-button {
+  text-decoration: none;
+}
+
+.bc-nav-button strong {
+  display: block;
+  margin-bottom: 4px;
+}
+
+.bc-main {
+  background: transparent;
+}
+
+.bc-panel-shell {
+  max-width: 1280px;
+}
+
+.bc-hero {
+  align-items: flex-start;
+}
+
+.bc-pill-row {
+  display: flex;
+  gap: 10px;
+  flex-wrap: wrap;
+}
+
+.bc-pill {
+  display: inline-flex;
+  align-items: center;
+  min-height: 36px;
+  padding: 8px 14px;
+  border-radius: 999px;
+  border: 1px solid color-mix(in srgb, var(--bc-accent) 34%, transparent);
+  background: color-mix(in srgb, var(--bc-accent) 10%, white);
+  color: var(--bc-text);
+  font-size: 0.86rem;
+  font-weight: 700;
+}
+
 .bc-page {
   display: grid;
   gap: 16px;
@@ -331,6 +388,10 @@
 }
 
 @media (max-width: 980px) {
+  .bc-frame {
+    grid-template-columns: 1fr;
+  }
+
   .bc-hero-top {
     grid-template-columns: 1fr;
   }
diff --git a/modules/boersenchecker/pages/index.php b/modules/boersenchecker/pages/index.php
index 6f99f7c6..b7dd24b3 100644
--- a/modules/boersenchecker/pages/index.php
+++ b/modules/boersenchecker/pages/index.php
@@ -19,6 +19,33 @@ if (!in_array($view, $allowedViews, true)) {
     $view = 'overview';
 }
 
+$viewMeta = [
+    'overview' => [
+        'label' => 'Ueberblick',
+        'title' => 'Depot-Ueberblick',
+        'description' => 'Kennzahlen, Kursverlauf und Performance fuer das ausgewaehlte Depot.',
+        'nav_description' => 'Marktueberblick, Positionen und gespeicherte Kurse.',
+    ],
+    'depotverwaltung' => [
+        'label' => 'Depotverwaltung',
+        'title' => 'Depotverwaltung',
+        'description' => 'Depots, Positionen und manuelle Kursdaten zentral verwalten.',
+        'nav_description' => 'Depots pflegen, FX abrufen und Positionen bearbeiten.',
+    ],
+    'aktienverwaltung' => [
+        'label' => 'Aktienverwaltung',
+        'title' => 'Aktienverwaltung',
+        'description' => 'Wertpapier-Stammdaten, Suche und Kursverlauf pro Aktie pflegen.',
+        'nav_description' => 'Ticker, ISIN, Markt und Kursverlauf pro Instrument.',
+    ],
+    'setup' => [
+        'label' => 'Setup',
+        'title' => 'Setup',
+        'description' => 'API-Zugaenge, Datenbankoptionen und Modulvorgaben verwalten.',
+        'nav_description' => 'Schluessel, Timeouts und Modulkonfiguration speichern.',
+    ],
+];
+
 $assetVersion = static function (string $relativePath): string {
     $fullPath = dirname(__DIR__) . '/' . ltrim($relativePath, '/');
     $mtime = is_file($fullPath) ? filemtime($fullPath) : false;
@@ -91,10 +118,6 @@ $renderSetup = static function (): void {
         }
     }
 
-    echo module_shell_header('boersenchecker', [
-        'title' => 'Setup',
-        'description' => 'Modulkonfiguration, API-Zugang und optionale separate Datenbank.',
-    ]);
     ?>
     <div class="bc-page">
         <?php if ($error): ?>
@@ -147,27 +170,73 @@ $renderSetup = static function (): void {
             </form>
         </section>
     </div>
-    <?= module_shell_footer() ?>
     <?php
 };
 
-$renderContent = static function () use ($view, $renderSetup): void {
+$renderContent = static function () use ($view, $renderSetup, $viewMeta): void {
+    $currentViewMeta = $viewMeta[$view] ?? $viewMeta['overview'];
+    $navItems = [
+        'overview' => '/apps/boersenchecker/index.php?view=overview',
+        'depotverwaltung' => '/apps/boersenchecker/index.php?view=depotverwaltung',
+        'aktienverwaltung' => '/apps/boersenchecker/index.php?view=aktienverwaltung',
+        'setup' => '/apps/boersenchecker/index.php?view=setup',
+    ];
+
+    ob_start();
+    if ($view === 'setup') {
+        $renderSetup();
+    } elseif ($view === 'depotverwaltung') {
+        $page = new \Modules\Boersenchecker\Support\DashboardPage();
+        module_tpl('boersenchecker', 'dashboard', $page->handle());
+    } elseif ($view === 'aktienverwaltung') {
+        $page = new \Modules\Boersenchecker\Support\InstrumentPage();
+        module_tpl('boersenchecker', 'instruments', $page->handle());
+    } else {
+        $page = new \Modules\Boersenchecker\Support\HomePage();
+        module_tpl('boersenchecker', 'home', $page->handle());
+    }
+    $innerContent = (string) ob_get_clean();
     ?>
     <div class="boersenchecker-module-shell window-app-shell">
-        <?php
-        if ($view === 'setup') {
-            $renderSetup();
-        } elseif ($view === 'depotverwaltung') {
-            $page = new \Modules\Boersenchecker\Support\DashboardPage();
-            module_tpl('boersenchecker', 'dashboard', $page->handle());
-        } elseif ($view === 'aktienverwaltung') {
-            $page = new \Modules\Boersenchecker\Support\InstrumentPage();
-            module_tpl('boersenchecker', 'instruments', $page->handle());
-        } else {
-            $page = new \Modules\Boersenchecker\Support\HomePage();
-            module_tpl('boersenchecker', 'home', $page->handle());
-        }
-        ?>
+        <div class="window-app-frame bc-frame">
+            <aside class="window-app-sidebar bc-sidebar">
+                <div class="window-app-brand bc-brand">
+                    <p class="window-app-kicker bc-kicker">Modul</p>
+                    <h1>Boersenchecker</h1>
+                    <p class="window-app-copy">Depotverwaltung fuer Aktien, Kaufdaten, Kursverlauf und Waehrungsumrechnung im Desktop-Standardlayout.</p>
+                </div>
+                <div class="window-app-nav-list bc-nav-list">
+                    <?php foreach ($navItems as $navView => $href): ?>
+                        <?php $meta = $viewMeta[$navView] ?? null; ?>
+                        <?php if (!$meta): continue; endif; ?>
+                        <a
+                            class="window-app-nav-button bc-nav-button<?= $view === $navView ? ' is-active' : '' ?>"
+                            href="<?= e($href) ?>"
+                        >
+                            <strong><?= e((string) $meta['label']) ?></strong>
+                            <span class="window-app-meta"><?= e((string) $meta['nav_description']) ?></span>
+                        </a>
+                    <?php endforeach; ?>
+                </div>
+            </aside>
+            <main class="window-app-main bc-main">
+                <div class="window-app-panel bc-panel-shell">
+                    <section class="window-app-hero bc-hero">
+                        <div>
+                            <p class="window-app-kicker bc-kicker">Boersenchecker</p>
+                            <h2 class="window-app-title bc-title"><?= e((string) $currentViewMeta['title']) ?></h2>
+                            <p class="window-app-copy"><?= e((string) $currentViewMeta['description']) ?></p>
+                        </div>
+                        <div class="window-app-pill-row bc-pill-row">
+                            <span class="window-app-pill bc-pill">Desktop-App</span>
+                            <span class="window-app-pill bc-pill">Legacy-Migration</span>
+                            <span class="window-app-pill bc-pill">View: <?= e((string) $currentViewMeta['label']) ?></span>
+                        </div>
+                    </section>
+                    <?= $innerContent ?>
+                </div>
+            </main>
+        </div>
     </div>
     <?php
 };
@@ -278,6 +347,7 @@ if ($isPartial) {
         .setup-field textarea { min-height: 100px; }
         .grid { display:grid; }
     </style>
+    <link rel="stylesheet" href="/assets/desktop/desktop.css">
     <link rel="stylesheet" href="/module-assets/index.php?module=boersenchecker&amp;path=assets/boersenchecker.css&amp;v=<?= htmlspecialchars($assetVersion('assets/boersenchecker.css'), ENT_QUOTES) ?>">
 </head>
 <body>
diff --git a/modules/boersenchecker/partials/dashboard.php b/modules/boersenchecker/partials/dashboard.php
index 77c15fd4..a5045c9a 100644
--- a/modules/boersenchecker/partials/dashboard.php
+++ b/modules/boersenchecker/partials/dashboard.php
@@ -1,7 +1,4 @@
 <?php $ownerQuery = $isAdmin ? '&owner_sub=' . urlencode((string) $ownerSub) : ''; ?>
-<?= module_shell_header('boersenchecker', [
-    'title' => 'Depotverwaltung',
-]) ?>
 <div class="bc-page">
   <?php if ($error): ?>
     <section class="section-box"><div class="bc-alert bc-alert--error"><?= e($error) ?></div></section>
@@ -510,4 +507,3 @@
     <?php endif; ?>
   </section>
 </div>
-<?= module_shell_footer() ?>
diff --git a/modules/boersenchecker/partials/home.php b/modules/boersenchecker/partials/home.php
index a0e03242..b9ea1129 100644
--- a/modules/boersenchecker/partials/home.php
+++ b/modules/boersenchecker/partials/home.php
@@ -1,6 +1,3 @@
-<?= module_shell_header('boersenchecker', [
-    'title' => 'Depot-Ueberblick',
-]) ?>
 <div class="bc-page" data-bc-home data-chart-endpoint="/api/boersenchecker/index.php?path=v1/chart-data">
       <script type="application/json" data-bc-instruments-json><?= json_encode(array_map(static function (array $position): array {
           return [
@@ -208,4 +205,3 @@
         </div>
       </section>
 </div>
-<?= module_shell_footer() ?>
diff --git a/modules/boersenchecker/partials/instruments.php b/modules/boersenchecker/partials/instruments.php
index 5307596e..d5691e1e 100644
--- a/modules/boersenchecker/partials/instruments.php
+++ b/modules/boersenchecker/partials/instruments.php
@@ -1,6 +1,3 @@
-<?= module_shell_header('boersenchecker', [
-    'title' => 'Aktienverwaltung',
-]) ?>
 <div class="bc-page">
   <?php if ($error): ?>
     <section class="section-box"><div class="bc-alert bc-alert--error"><?= e($error) ?></div></section>
@@ -185,4 +182,3 @@
     <?php endif; ?>
   </section>
 </div>
-<?= module_shell_footer() ?>