diff --git a/frontend/src/components/layout/TopBar.tsx b/frontend/src/components/layout/TopBar.tsx
index 3f3a83b..4d07831 100644
--- a/frontend/src/components/layout/TopBar.tsx
+++ b/frontend/src/components/layout/TopBar.tsx
@@ -62,7 +62,7 @@ export function TopBar() {
       <div className="flex items-center gap-3">
         <button
           onClick={toggleSidebar}
-          className="p-2 rounded-md bg-secondary-900 text-secondary-300 hover:bg-secondary-800 min-h-touch min-w-touch flex items-center justify-center focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
+          className="p-2 rounded-md bg-primary-600 text-white hover:bg-primary-700 min-h-touch min-w-touch flex items-center justify-center focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
           aria-label="Seitenleiste ein-/ausklappen"
           aria-expanded={true}
         >
@@ -149,37 +149,8 @@ export function TopBar() {
                 className="w-full text-left px-3 py-2 text-sm hover:bg-secondary-50 min-h-touch focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
                 role="menuitem"
               >
-                {t('topbar.profile')}
+                {t('topbar.profile', 'Mein Konto')}
               </button>
-              {canAccess('settings:read') && (
-                <button
-                  onClick={() => { setUserMenuOpen(false); navigate('/settings'); }}
-                  className="w-full text-left px-3 py-2 text-sm hover:bg-secondary-50 min-h-touch focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
-                  role="menuitem"
-                >
-                  {t('topbar.settings')}
-                </button>
-              )}
-              {canAccess('audit:read') && (
-                <button
-                  onClick={() => { setUserMenuOpen(false); navigate('/audit-log'); }}
-                  className="w-full text-left px-3 py-2 text-sm hover:bg-secondary-50 min-h-touch focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
-                  role="menuitem"
-                >
-                  {t('nav.auditLog')}
-                </button>
-              )}
-              <a
-                href="/docs"
-                target="_blank"
-                rel="noopener noreferrer"
-                onClick={() => setUserMenuOpen(false)}
-                className="w-full text-left px-3 py-2 text-sm hover:bg-secondary-50 min-h-touch focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500 flex items-center gap-2"
-                role="menuitem"
-              >
-                <Code className="w-4 h-4" aria-hidden="true" strokeWidth={2} />
-                {t('settings.apiDocs', 'API Dokumentation')}
-              </a>
               <button
                 onClick={handleLogout}
                 className="w-full text-left px-3 py-2 text-sm text-danger-600 hover:bg-danger-50 min-h-touch focus:outline-none focus-visible:ring-2 focus-visible:ring-danger-500"
diff --git a/frontend/src/pages/Help.tsx b/frontend/src/pages/Help.tsx
index a28019d..2196fc4 100644
--- a/frontend/src/pages/Help.tsx
+++ b/frontend/src/pages/Help.tsx
@@ -2,7 +2,7 @@ import React, { useState } from 'react';
 import { NavLink, Outlet, useParams } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { useUIStore } from '@/store/uiStore';
-import { ChevronRight, ChevronDown, BookOpen, Users, Calendar, Mail, FolderOpen, Settings, Shield, Zap, Bot, ArrowLeft } from 'lucide-react';
+import { ChevronRight, ChevronDown, BookOpen, Users, Calendar, Mail, FolderOpen, Settings, Shield, Zap, Bot, ArrowLeft, Code } from 'lucide-react';
 
 interface HelpNode {
   title: string;
@@ -75,12 +75,10 @@ const HELP_TREE: HelpNode[] = [
     ],
   },
   {
-    title: 'Automation & KI',
-    icon: <Bot className="w-4 h-4" />,
+    title: 'Entwicklung',
+    icon: <Code className="w-4 h-4" />,
     children: [
-      { title: 'KI-Assistent', path: '/help/ai-assistant' },
-      { title: 'Workflows', path: '/help/workflows' },
-      { title: 'Automation', path: '/help/automation' },
+      { title: 'API Dokumentation', path: '/help/api-docs' },
     ],
   },
 ];
diff --git a/frontend/src/pages/Logs.tsx b/frontend/src/pages/Logs.tsx
new file mode 100644
index 0000000..82c9213
--- /dev/null
+++ b/frontend/src/pages/Logs.tsx
@@ -0,0 +1,119 @@
+import React, { useState } from 'react';
+import { NavLink, Outlet } from 'react-router-dom';
+import { useUIStore } from '@/store/uiStore';
+import { ChevronRight, ChevronDown, ScrollText, FileText, AlertTriangle, ArrowLeft } from 'lucide-react';
+
+interface LogNode {
+  title: string;
+  path?: string;
+  icon?: React.ReactNode;
+  children?: LogNode[];
+}
+
+const LOG_TREE: LogNode[] = [
+  {
+    title: 'Audit-Log',
+    icon: <ScrollText className="w-4 h-4" />,
+    children: [
+      { title: 'Übersicht', path: '/logs/overview' },
+      { title: 'Filter', path: '/logs/filter' },
+      { title: 'Export', path: '/logs/export' },
+    ],
+  },
+  {
+    title: 'System-Logs',
+    icon: <FileText className="w-4 h-4" />,
+    children: [
+      { title: 'Container', path: '/logs/container' },
+      { title: 'Worker', path: '/logs/worker' },
+      { title: 'Datenbank', path: '/logs/database' },
+    ],
+  },
+  {
+    title: 'Fehler',
+    icon: <AlertTriangle className="w-4 h-4" />,
+    children: [
+      { title: 'API-Fehler', path: '/logs/api-errors' },
+      { title: 'Plugin-Fehler', path: '/logs/plugin-errors' },
+    ],
+  },
+];
+
+function TreeItem({ node, depth }: { node: LogNode; depth: number }) {
+  const [expanded, setExpanded] = useState(depth < 1);
+  const hasChildren = node.children && node.children.length > 0;
+  const paddingLeft = depth * 16 + 12;
+
+  if (hasChildren) {
+    return (
+      <div>
+        <button
+          onClick={() => setExpanded(!expanded)}
+          className="w-full flex items-center gap-2 px-3 py-2 rounded-lg text-sm font-medium text-secondary-700 hover:bg-secondary-100 transition-colors min-h-touch"
+          style={{ paddingLeft }}
+          aria-expanded={expanded}
+        >
+          {expanded ? <ChevronDown className="w-3.5 h-3.5 flex-shrink-0" /> : <ChevronRight className="w-3.5 h-3.5 flex-shrink-0" />}
+          {node.icon}
+          <span>{node.title}</span>
+        </button>
+        {expanded && (
+          <div>
+            {node.children!.map((child) => (
+              <TreeItem key={child.path || child.title} node={child} depth={depth + 1} />
+            ))}
+          </div>
+        )}
+      </div>
+    );
+  }
+
+  return (
+    <NavLink
+      to={node.path!}
+      className={({ isActive }) =>
+        `flex items-center gap-2 px-3 py-2 rounded-lg text-sm transition-colors min-h-touch ${
+          isActive
+            ? 'bg-primary-100 text-primary-700 font-medium'
+            : 'text-secondary-600 hover:bg-secondary-100 hover:text-secondary-900'
+        }`
+      }
+      style={{ paddingLeft: paddingLeft + 20 }}
+    >
+      {node.icon}
+      <span>{node.title}</span>
+    </NavLink>
+  );
+}
+
+export function LogsPage() {
+  const sidebarOpen = useUIStore((state) => state.sidebarOpen);
+
+  return (
+    <div className="flex h-full overflow-hidden" data-testid="logs-page">
+      <aside className={`${sidebarOpen ? 'w-64 border-r border-secondary-200' : 'w-0'} flex-shrink-0 min-h-[calc(100vh-4rem)] transition-all duration-200 overflow-hidden`}>
+        <div className="w-64 flex-shrink-0 p-4">
+          <div className="flex items-center gap-2 mb-4">
+            <button
+              onClick={() => window.location.href = '/start'}
+              className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
+              aria-label="Zurück zur Startseite"
+              title="Zurück zur Startseite"
+            >
+              <ArrowLeft className="w-4 h-4" />
+            </button>
+            <h1 className="text-xl font-bold text-secondary-900">Logs</h1>
+          </div>
+          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label="Logs Navigation">
+            {LOG_TREE.map((node) => (
+              <TreeItem key={node.title} node={node} depth={0} />
+            ))}
+          </nav>
+        </div>
+      </aside>
+      <main className="flex-1 p-6 overflow-y-auto" data-testid="logs-content">
+        <Outlet />
+      </main>
+    </div>
+  );
+}
diff --git a/frontend/src/pages/StartPage.tsx b/frontend/src/pages/StartPage.tsx
index 8b7fe27..218c517 100644
--- a/frontend/src/pages/StartPage.tsx
+++ b/frontend/src/pages/StartPage.tsx
@@ -8,7 +8,7 @@ import { useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { useAuthStore } from '@/store/authStore';
 import { useUIStore } from '@/store/uiStore';
-import { Settings, HelpCircle, LayoutGrid, ArrowRight, Plus, Bot, Zap, ArrowLeft } from 'lucide-react';
+import { Settings, HelpCircle, LayoutGrid, ArrowRight, Plus, Bot, Zap, ArrowLeft, ScrollText } from 'lucide-react';
 
 // Workspace tile definition
 interface WorkspaceTile {
@@ -42,6 +42,7 @@ export function StartPage() {
     { id: 'settings', label: 'Einstellungen', icon: <Settings className="w-4 h-4" />, onClick: () => navigate('/settings') },
     { id: 'agents', label: 'Agenten', icon: <Bot className="w-4 h-4" />, onClick: () => navigate('/agents/overview') },
     { id: 'automation', label: 'Automation', icon: <Zap className="w-4 h-4" />, onClick: () => navigate('/automation/overview') },
+    { id: 'logs', label: 'Logs', icon: <ScrollText className="w-4 h-4" />, onClick: () => navigate('/logs/overview') },
     { id: 'help', label: 'Hilfe', icon: <HelpCircle className="w-4 h-4" />, onClick: () => navigate('/help/welcome') },
   ];
 
diff --git a/frontend/src/pages/help/HelpApiDocs.tsx b/frontend/src/pages/help/HelpApiDocs.tsx
new file mode 100644
index 0000000..671f15e
--- /dev/null
+++ b/frontend/src/pages/help/HelpApiDocs.tsx
@@ -0,0 +1,33 @@
+import React from 'react';
+
+export function HelpApiDocsPage() {
+  return (
+    <div className="max-w-4xl mx-auto prose prose-secondary">
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">API Dokumentation</h1>
+      <p className="text-secondary-600 mb-4">
+        Die vollständige API-Dokumentation finden Sie unter <a href="/docs" target="_blank" rel="noopener noreferrer" className="text-primary-600 hover:underline">/docs</a> (Swagger UI).
+      </p>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Übersicht</h2>
+      <p className="text-secondary-600 mb-4">
+        LeoCRM bietet eine REST-API mit über 224 Endpoints. Die API verwendet JSON für Request- und Response-Bodies.
+      </p>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Authentifizierung</h2>
+      <p className="text-secondary-600 mb-4">
+        Die API verwendet Session-basierte Authentifizierung mit HttpOnly-Cookies. Nach dem Login über <code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">POST /api/v1/auth/login</code> wird ein Session-Cookie gesetzt.
+      </p>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Wichtige Endpoints</h2>
+      <ul className="list-disc list-inside text-secondary-600 space-y-1">
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/contacts</code> — Kontakte abrufen</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">POST /api/v1/contacts</code> — Kontakt erstellen</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/calendar/entries</code> — Kalendereinträge</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/mail/accounts</code> — Mail-Konten</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/plugins/active-manifests</code> — Plugin-Manifeste</li>
+      </ul>
+      <div className="mt-6 p-4 bg-primary-50 rounded-lg border border-primary-200">
+        <p className="text-sm text-primary-700">
+          📖 <strong>Vollständige Doku:</strong> <a href="/docs" target="_blank" rel="noopener noreferrer" className="underline">Swagger UI öffnen</a>
+        </p>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/routes/index.tsx b/frontend/src/routes/index.tsx
index 1f533fa..d7d25ca 100644
--- a/frontend/src/routes/index.tsx
+++ b/frontend/src/routes/index.tsx
@@ -83,6 +83,10 @@ const AgentsPlaceholderPage = React.lazy(() => import('@/pages/agents/AgentsPlac
 const AutomationPage = React.lazy(() => import('@/pages/Automation').then(m => ({ default: m.AutomationPage })));
 const AutomationOverviewPage = React.lazy(() => import('@/pages/automation/AutomationOverview').then(m => ({ default: m.AutomationOverviewPage })));
 const AutomationPlaceholderPage = React.lazy(() => import('@/pages/automation/AutomationPlaceholder').then(m => ({ default: m.AutomationPlaceholderPage })));
+const LogsPage = React.lazy(() => import('@/pages/Logs').then(m => ({ default: m.LogsPage })));
+const LogsOverviewPage = React.lazy(() => import('@/pages/logs/LogsOverview').then(m => ({ default: m.LogsOverviewPage })));
+const LogsPlaceholderPage = React.lazy(() => import('@/pages/logs/LogsPlaceholder').then(m => ({ default: m.LogsPlaceholderPage })));
+const HelpApiDocsPage = React.lazy(() => import('@/pages/help/HelpApiDocs').then(m => ({ default: m.HelpApiDocsPage })));
 const ApiDocsPage = React.lazy(() => import('@/pages/ApiDocs').then(m => ({ default: m.ApiDocsPage })));
 
 /** Centered spinner fallback for lazy-loaded routes */
@@ -161,6 +165,7 @@ const router = createBrowserRouter([
           { path: 'navigation', element: withSuspense(<HelpNavigationPage />) },
           { path: 'contacts', element: withSuspense(<HelpContactsPage />) },
           { path: 'mail-setup', element: withSuspense(<HelpMailSetupPage />) },
+          { path: 'api-docs', element: withSuspense(<HelpApiDocsPage />) },
           { path: '*', element: withSuspense(<HelpPlaceholderPage />) },
         ],
       },
@@ -190,6 +195,14 @@ const router = createBrowserRouter([
           { path: '*', element: withSuspense(<AutomationPlaceholderPage />) },
         ],
       },
+      {
+        path: '/logs',
+        element: withSuspense(<LogsPage />),
+        children: [
+          { path: 'overview', element: withSuspense(<LogsOverviewPage />) },
+          { path: '*', element: withSuspense(<LogsPlaceholderPage />) },
+        ],
+      },
       {
         path: '/settings',
         element: <PermissionRoute permission="settings:read">{withSuspense(<SettingsPage />)}</PermissionRoute>,