diff --git a/public/assets/js/ui-user.js b/public/assets/js/ui-user.js
index 0612014..6fa1d12 100644
--- a/public/assets/js/ui-user.js
+++ b/public/assets/js/ui-user.js
@@ -13,6 +13,8 @@ const state = {
 };
 
 const pageType = document.body?.dataset?.page || 'account';
+const DEBUG_EMAIL = 'madmin@papa-kind-treff.info';
+const MAX_CONSOLE_LINES = 200;
 
 let avatarBtn;
 let userMenuPanel;
@@ -27,12 +29,22 @@ let bridgePreview;
 let validateBridgeBtn;
 let menuInitialized = false;
 let menuOpen = false;
+let debugButton;
+let debugDialog;
+let debugPhpLoaded = false;
+let debugPhpLoading = false;
+let debugActiveTab = 'php';
+let phpInfoContainer;
+let consoleContainer;
+let debugStylesInjected = false;
+let consolePatched = false;
+const consoleBuffer = [];
 
 export function initUserPanel() {
   avatarBtn = document.getElementById('btn-user');
   userMenuPanel = document.getElementById('userMenuPanel');
-  updateAvatar();
-  updateRoleVisibility();
+  ensureConsoleCapture();
+  handleUserContextChange();
   if (!menuInitialized && avatarBtn && userMenuPanel) {
     avatarBtn.addEventListener('click', toggleUserMenu);
     document.addEventListener('click', handleDocumentClick, true);
@@ -112,6 +124,13 @@ function enforcePageAccess() {
   window.location.href = '/account.php';
 }
 
+function handleUserContextChange() {
+  updateAvatar();
+  updateRoleVisibility();
+  enforcePageAccess();
+  refreshDebugAccess();
+}
+
 function updateAvatar() {
   const target = document.getElementById('userAvatar');
   if (!target) return;
@@ -191,9 +210,7 @@ async function loadAccountData() {
     if (!res?.ok) throw new Error(res?.error || 'Profil konnte nicht geladen werden');
     if (res.user) {
       window.__currentUser = res.user;
-      updateAvatar();
-      updateRoleVisibility();
-      enforcePageAccess();
+      handleUserContextChange();
     }
     fillProfileForm(res.user);
     fillSettingsForm(res.settings || {});
@@ -246,7 +263,7 @@ async function submitProfileForm(ev) {
     const res = await apiAction('account.profile.update', { method: 'POST', data });
     if (!res?.ok) throw new Error(res?.error || 'Profil konnte nicht gespeichert werden');
     window.__currentUser = res.user;
-    updateAvatar();
+    handleUserContextChange();
     toast('Profil aktualisiert', true);
   } catch (err) {
     toast(err.message || 'Fehler beim Speichern', false);
@@ -591,3 +608,183 @@ function escapeHtml(str) {
     .replace(/"/g, '"')
     .replace(/'/g, ''');
 }
+
+function refreshDebugAccess() {
+  const allowed = (window.__currentUser?.email || '').toLowerCase() === DEBUG_EMAIL;
+  if (!allowed) {
+    debugButton?.remove();
+    debugButton = null;
+    if (debugDialog?.open) {
+      debugDialog.close();
+    }
+    return;
+  }
+  ensureDebugStyles();
+  ensureConsoleCapture();
+  ensureDebugDialog();
+  if (!debugButton) {
+    debugButton = document.createElement('button');
+    debugButton.id = 'debugToggleButton';
+    debugButton.className = 'debug-floating-btn';
+    debugButton.type = 'button';
+    debugButton.textContent = 'Debug';
+    debugButton.addEventListener('click', () => openDebugDialog('php'));
+    document.body.appendChild(debugButton);
+  }
+}
+
+function ensureDebugStyles() {
+  if (debugStylesInjected) return;
+  const style = document.createElement('style');
+  style.id = 'debugStyles';
+  style.textContent = `
+    .debug-floating-btn{position:fixed;left:16px;bottom:16px;padding:.5rem 1rem;border-radius:999px;border:none;background:#0ea5e9;color:#fff;font-weight:600;box-shadow:0 10px 25px rgba(15,23,42,.25);z-index:60;cursor:pointer}
+    .debug-floating-btn:hover{background:#0284c7}
+    dialog#debugDialog::backdrop{background:rgba(15,23,42,.45)}
+    #debugDialog{border:none;border-radius:1rem;padding:0;width:80vw;max-width:960px}
+    .debug-shell{display:flex;flex-direction:column;height:80vh}
+    .debug-header{display:flex;align-items:center;justify-content:space-between;padding:1rem;border-bottom:1px solid #e2e8f0}
+    .debug-tabs{display:flex;border-bottom:1px solid #e2e8f0}
+    .debug-tabs button{flex:1;padding:.75rem 1rem;border:none;background:transparent;cursor:pointer;font-weight:600}
+    .debug-tabs button.active{background:#e0f2fe;color:#0c4a6e}
+    .debug-panel{flex:1;overflow:auto;padding:1rem;background:#f8fafc}
+    #debugConsoleContent{font-family:monospace;font-size:.85rem;white-space:pre-wrap}
+    .debug-console-entry{margin-bottom:.35rem}
+    .debug-console-entry.log{color:#15803d}
+    .debug-console-entry.warn{color:#b45309}
+    .debug-console-entry.error{color:#b91c1c}
+  `;
+  document.head.appendChild(style);
+  debugStylesInjected = true;
+}
+
+function ensureDebugDialog() {
+  if (debugDialog) return;
+  debugDialog = document.createElement('dialog');
+  debugDialog.id = 'debugDialog';
+  debugDialog.innerHTML = `
+    <div class="debug-shell bg-white rounded-2xl shadow-2xl">
+      <div class="debug-header">
+        <strong>Debug Tools</strong>
+        <button type="button" class="btn" data-debug-close>Schließen</button>
+      </div>
+      <div class="debug-tabs">
+        <button type="button" data-debug-tab="php" class="active">PHP Debug</button>
+        <button type="button" data-debug-tab="console">Console</button>
+      </div>
+      <div class="debug-panel" data-debug-panel="php">
+        <div id="debugPhpContent" class="text-sm text-slate-700">Lade Daten…</div>
+      </div>
+      <div class="debug-panel hidden" data-debug-panel="console">
+        <pre id="debugConsoleContent"></pre>
+      </div>
+    </div>`;
+  document.body.appendChild(debugDialog);
+  phpInfoContainer = debugDialog.querySelector('#debugPhpContent');
+  consoleContainer = debugDialog.querySelector('#debugConsoleContent');
+  debugDialog.querySelector('[data-debug-close]')?.addEventListener('click', () => closeDebugDialog());
+  debugDialog.addEventListener('close', () => setDebugTab('php'));
+  debugDialog.querySelectorAll('[data-debug-tab]').forEach(btn => {
+    btn.addEventListener('click', () => setDebugTab(btn.getAttribute('data-debug-tab')));
+  });
+}
+
+function openDebugDialog(tab = 'php') {
+  ensureDebugDialog();
+  setDebugTab(tab);
+  if (!debugDialog.open) debugDialog.showModal();
+  if (tab === 'php') {
+    loadPhpInfo();
+  } else {
+    renderConsolePanel();
+  }
+}
+
+function closeDebugDialog() {
+  if (debugDialog?.open) debugDialog.close();
+}
+
+function setDebugTab(tab) {
+  if (!debugDialog) return;
+  debugActiveTab = tab || 'php';
+  debugDialog.querySelectorAll('[data-debug-tab]').forEach(btn => {
+    const isActive = btn.getAttribute('data-debug-tab') === debugActiveTab;
+    btn.classList.toggle('active', isActive);
+  });
+  debugDialog.querySelectorAll('[data-debug-panel]').forEach(panel => {
+    panel.classList.toggle('hidden', panel.getAttribute('data-debug-panel') !== debugActiveTab);
+  });
+  if (debugActiveTab === 'php') {
+    loadPhpInfo();
+  } else {
+    renderConsolePanel();
+  }
+}
+
+async function loadPhpInfo() {
+  if (debugPhpLoaded || debugPhpLoading || !phpInfoContainer) return;
+  debugPhpLoading = true;
+  phpInfoContainer.textContent = 'Lade phpinfo…';
+  try {
+    const res = await apiAction('debug.phpinfo', { method: 'GET' });
+    if (!res?.ok) throw new Error(res?.error || 'Fehler beim Laden');
+    const frame = document.createElement('iframe');
+    frame.style.width = '100%';
+    frame.style.height = '100%';
+    frame.style.minHeight = '400px';
+    frame.style.border = 'none';
+    frame.srcdoc = res.html || '<p>Keine Daten</p>';
+    phpInfoContainer.innerHTML = '';
+    phpInfoContainer.appendChild(frame);
+    debugPhpLoaded = true;
+  } catch (err) {
+    phpInfoContainer.textContent = err.message || 'Fehler beim Laden';
+  } finally {
+    debugPhpLoading = false;
+  }
+}
+
+function renderConsolePanel() {
+  if (!consoleContainer) return;
+  if (!consoleBuffer.length) {
+    consoleContainer.textContent = 'Noch keine Konsolenmeldungen in dieser Sitzung.';
+    return;
+  }
+  const lines = consoleBuffer.map(entry => {
+    const time = entry.time.toLocaleTimeString();
+    return `<div class="debug-console-entry ${entry.type}">[${time}] ${escapeHtml(entry.text)}</div>`;
+  });
+  consoleContainer.innerHTML = lines.join('');
+}
+
+function ensureConsoleCapture() {
+  if (consolePatched) return;
+  ['log', 'warn', 'error'].forEach(type => {
+    const original = console[type];
+    console[type] = function (...args) {
+      appendConsoleMessage(type, args);
+      if (typeof original === 'function') {
+        original.apply(console, args);
+      }
+    };
+  });
+  consolePatched = true;
+}
+
+function appendConsoleMessage(type, args) {
+  const text = args.map(formatConsoleArg).join(' ');
+  consoleBuffer.push({ type, text, time: new Date() });
+  if (consoleBuffer.length > MAX_CONSOLE_LINES) consoleBuffer.shift();
+  if (debugActiveTab === 'console' && debugDialog?.open) {
+    renderConsolePanel();
+  }
+}
+
+function formatConsoleArg(arg) {
+  if (typeof arg === 'string') return arg;
+  try {
+    return JSON.stringify(arg);
+  } catch (err) {
+    return String(arg);
+  }
+}
diff --git a/src/ApiKernel.php b/src/ApiKernel.php
index e399100..71c3b7a 100644
--- a/src/ApiKernel.php
+++ b/src/ApiKernel.php
@@ -859,6 +859,9 @@ class ApiKernel
                 case 'placeholders.schema':
                     $this->handlePlaceholderSchema();
                     break;
+                case 'debug.phpinfo':
+                    $this->handleDebugPhpInfo();
+                    break;
                 case 'templates.test_send':
                     $this->handleTemplateTestSend();
                     break;
@@ -1820,6 +1823,16 @@ class ApiKernel
         ]);
     }
 
+    private function handleDebugPhpInfo(): void
+    {
+        $user = $this->authService->requireAuth();
+        $this->ensureDebugUser($user);
+        ob_start();
+        phpinfo(INFO_GENERAL | INFO_CONFIGURATION | INFO_MODULES | INFO_ENVIRONMENT);
+        $html = ob_get_clean() ?: '';
+        $this->respond(['ok' => true, 'html' => $html]);
+    }
+
     private function resolveBridgeConfig(?int $customerId): array
     {
         $fileConf = $this->conf['placeholders']['bridge'] ?? [];
@@ -2146,6 +2159,14 @@ class ApiKernel
         }
     }
 
+    private function ensureDebugUser(array $user): void
+    {
+        $email = strtolower((string)($user['email'] ?? ''));
+        if ($email !== 'madmin@papa-kind-treff.info') {
+            $this->fail('Debug nicht erlaubt', null, 403);
+        }
+    }
+
     private function defaultApiBase(): string
     {
         $base = $this->conf['base_url'] ?? '';