diff --git a/client/src/Admin.jsx b/client/src/Admin.jsx
index def1f6f..bb285ee 100644
--- a/client/src/Admin.jsx
+++ b/client/src/Admin.jsx
@@ -1,4 +1,4 @@
-import { useState, useEffect } from 'react';
+import { useState, useEffect, useRef } from 'react';
 import './Admin.css';
 import AudioRoutingMatrix from './components/AudioRoutingMatrix';
 
@@ -19,11 +19,12 @@ function Admin() {
   const [selectedInputDevice, setSelectedInputDevice] = useState(null);
   const [selectedOutputDevice, setSelectedOutputDevice] = useState(null);
   const [selectedSampleRate, setSelectedSampleRate] = useState(48000);
-  const [isEditingAudio, setIsEditingAudio] = useState(false);
+  const isEditingAudioRef = useRef(false);
 
   // Channel names (Phase 2.5)
   const [channelNames, setChannelNames] = useState({ inputs: {}, outputs: {} });
-  const [editingChannelNames, setEditingChannelNames] = useState(false);
+  const editingChannelNamesRef = useRef(false);
+  const [, forceUpdate] = useState({});
 
   // Gestion formulaire nouveau groupe
   const [showGroupForm, setShowGroupForm] = useState(false);
@@ -104,10 +105,14 @@ function Admin() {
 
     const device = currentData.device || { inputChannels: 8, outputChannels: 8 };
     setCurrentDevice(device);
-    setChannelNames(channelNamesData.channelNames || { inputs: {}, outputs: {} });
 
-    // Ne réinitialiser les sélections que si l'utilisateur n'est pas en train d'éditer
-    if (!isEditingAudio) {
+    // Ne pas écraser les noms de canaux pendant l'édition
+    if (!editingChannelNamesRef.current) {
+      setChannelNames(channelNamesData.channelNames || { inputs: {}, outputs: {} });
+    }
+
+    // Ne réinitialiser les sélections que lors du chargement initial (pas en train d'éditer)
+    if (!isEditingAudioRef.current) {
       setSelectedInputDevice(device.inputDeviceId ?? null);
       setSelectedOutputDevice(device.outputDeviceId ?? null);
       setSelectedSampleRate(device.sampleRate || 48000);
@@ -216,7 +221,8 @@ function Admin() {
 
       if (res.ok) {
         alert('Noms de canaux sauvegardés avec succès!');
-        setEditingChannelNames(false);
+        editingChannelNamesRef.current = false;
+        forceUpdate({});
         await loadAudioDevices();
       } else {
         const error = await res.json();
@@ -251,7 +257,7 @@ function Admin() {
       });
 
       if (res.ok) {
-        setIsEditingAudio(false); // Désactiver le mode édition
+        isEditingAudioRef.current = false; // Désactiver le mode édition
         alert('Configuration audio sauvegardée avec succès!');
         await loadAudioDevices();
       } else {
@@ -442,7 +448,7 @@ function Admin() {
                 <select
                   value={selectedInputDevice ?? ''}
                   onChange={(e) => {
-                    setIsEditingAudio(true);
+                    isEditingAudioRef.current = true;
                     setSelectedInputDevice(e.target.value === '' ? null : e.target.value);
                   }}
                   className="device-select"
@@ -468,7 +474,7 @@ function Admin() {
                 <select
                   value={selectedOutputDevice ?? ''}
                   onChange={(e) => {
-                    setIsEditingAudio(true);
+                    isEditingAudioRef.current = true;
                     setSelectedOutputDevice(e.target.value === '' ? null : e.target.value);
                   }}
                   className="device-select"
@@ -494,7 +500,7 @@ function Admin() {
                 <select
                   value={selectedSampleRate}
                   onChange={(e) => {
-                    setIsEditingAudio(true);
+                    isEditingAudioRef.current = true;
                     setSelectedSampleRate(parseInt(e.target.value));
                   }}
                   className="device-select"
@@ -514,8 +520,8 @@ function Admin() {
               <div className="audio-section">
                 <div style={{display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 'var(--spacing-md)'}}>
                   <h3>Nommage des canaux physiques</h3>
-                  {!editingChannelNames ? (
-                    <button onClick={() => setEditingChannelNames(true)} className="btn-secondary">
+                  {!editingChannelNamesRef.current ? (
+                    <button onClick={() => { editingChannelNamesRef.current = true; forceUpdate({}); }} className="btn-secondary">
                       Modifier les noms
                     </button>
                   ) : (
@@ -523,7 +529,7 @@ function Admin() {
                       <button onClick={handleSaveChannelNames} className="btn-primary">
                         Sauvegarder
                       </button>
-                      <button onClick={() => { setEditingChannelNames(false); loadAudioDevices(); }} className="btn-secondary">
+                      <button onClick={() => { editingChannelNamesRef.current = false; forceUpdate({}); loadAudioDevices(); }} className="btn-secondary">
                         Annuler
                       </button>
                     </div>
@@ -544,10 +550,10 @@ function Admin() {
                             value={channelNames.inputs?.[i] || ''}
                             onChange={(e) => updateChannelName('inputs', i, e.target.value)}
                             placeholder={`Input ${i}`}
-                            disabled={!editingChannelNames}
+                            disabled={!editingChannelNamesRef.current}
                             style={{
                               padding: 'var(--spacing-sm)',
-                              background: editingChannelNames ? 'var(--color-bg)' : 'var(--color-surface-hover)',
+                              background: editingChannelNamesRef.current ? 'var(--color-bg)' : 'var(--color-surface-hover)',
                               border: '1px solid var(--color-border)',
                               borderRadius: '6px',
                               color: 'var(--color-text)',
@@ -572,10 +578,10 @@ function Admin() {
                             value={channelNames.outputs?.[i] || ''}
                             onChange={(e) => updateChannelName('outputs', i, e.target.value)}
                             placeholder={`Output ${i}`}
-                            disabled={!editingChannelNames}
+                            disabled={!editingChannelNamesRef.current}
                             style={{
                               padding: 'var(--spacing-sm)',
-                              background: editingChannelNames ? 'var(--color-bg)' : 'var(--color-surface-hover)',
+                              background: editingChannelNamesRef.current ? 'var(--color-bg)' : 'var(--color-surface-hover)',
                               border: '1px solid var(--color-border)',
                               borderRadius: '6px',
                               color: 'var(--color-text)',
diff --git a/client/src/components/PTTButton.jsx b/client/src/components/PTTButton.jsx
index f431b9d..0f84849 100644
--- a/client/src/components/PTTButton.jsx
+++ b/client/src/components/PTTButton.jsx
@@ -22,16 +22,6 @@ export default function PTTButton({ isTalking, onPressStart, onPressEnd, audioLe
   const currentYRef = useRef(null);
   const [dragOffset, setDragOffset] = useState(0); // Offset visuel du drag (en pixels)
 
-  // Initialiser le mode selon les préférences au démarrage
-  useEffect(() => {
-    const currentSettings = loadSettings();
-    if (currentSettings.defaultPTTMode === 'continuous') {
-      setIsLockMode(true);
-      isLockModeRef.current = true;
-      console.log('Mode continu activé par défaut (préférences)');
-    }
-  }, []);
-
   useEffect(() => {
     const button = buttonRef.current;
     if (!button) return;
diff --git a/client/src/components/PWAInstallPrompt.css b/client/src/components/PWAInstallPrompt.css
index b3f1643..3d3addb 100644
--- a/client/src/components/PWAInstallPrompt.css
+++ b/client/src/components/PWAInstallPrompt.css
@@ -3,8 +3,22 @@
   bottom: 0;
   left: 0;
   right: 0;
+  top: 0;
   z-index: 1001;
-  animation: slideUp 0.3s ease;
+  background: rgba(0, 0, 0, 0.6);
+  backdrop-filter: blur(4px);
+  display: flex;
+  align-items: flex-end;
+  animation: fadeIn 0.3s ease;
+}
+
+@keyframes fadeIn {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
 }
 
 @keyframes slideUp {
@@ -17,12 +31,14 @@
 }
 
 .pwa-prompt {
-  background: var(--bg-secondary);
+  width: 100%;
+  background: #1a1a1a;
   border-top-left-radius: 16px;
   border-top-right-radius: 16px;
   box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
   max-height: 80vh;
   overflow-y: auto;
+  animation: slideUp 0.3s ease;
 }
 
 .pwa-prompt-header {
@@ -36,13 +52,13 @@
 .pwa-prompt-header h3 {
   margin: 0;
   font-size: 1.2rem;
-  color: var(--text-primary);
+  color: #ffffff;
 }
 
 .pwa-prompt-close {
   background: none;
   border: none;
-  color: var(--text-secondary);
+  color: #9ca3af;
   cursor: pointer;
   padding: 0.5rem;
   border-radius: 8px;
@@ -50,8 +66,8 @@
 }
 
 .pwa-prompt-close:hover {
-  background: var(--bg-hover);
-  color: var(--text-primary);
+  background: rgba(255, 255, 255, 0.1);
+  color: #ffffff;
 }
 
 .pwa-prompt-content {
@@ -59,8 +75,8 @@
 }
 
 .pwa-prompt-content > p {
-  margin: 0 0 var(--spacing-lg) 0;
-  color: var(--text-secondary);
+  margin: 0 0 1.5rem 0;
+  color: #d1d5db;
   line-height: 1.6;
 }
 
@@ -73,9 +89,9 @@
 .pwa-prompt-step {
   display: flex;
   align-items: center;
-  gap: var(--spacing-md);
-  padding: var(--spacing-md);
-  background: var(--bg-hover);
+  gap: 1rem;
+  padding: 1rem;
+  background: rgba(255, 255, 255, 0.05);
   border-radius: 8px;
 }
 
@@ -85,7 +101,7 @@
   justify-content: center;
   width: 32px;
   height: 32px;
-  background: var(--primary-color);
+  background: #3b82f6;
   color: white;
   border-radius: 50%;
   font-weight: 600;
@@ -95,13 +111,13 @@
 .pwa-prompt-step p {
   flex: 1;
   margin: 0;
-  color: var(--text-primary);
+  color: #ffffff;
   font-size: 0.95rem;
 }
 
 .pwa-prompt-step svg {
   flex-shrink: 0;
-  color: var(--primary-color);
+  color: #3b82f6;
 }
 
 .pwa-prompt-footer {
diff --git a/client/src/components/Settings.jsx b/client/src/components/Settings.jsx
index e23cf7e..7768f60 100644
--- a/client/src/components/Settings.jsx
+++ b/client/src/components/Settings.jsx
@@ -4,9 +4,7 @@ import './Settings.css';
 const STORAGE_KEY = 'ptt-live-settings';
 
 const defaultSettings = {
-  defaultPTTMode: 'normal', // 'normal' ou 'continuous'
-  vibrationEnabled: true,
-  audioFeedbackEnabled: true
+  vibrationEnabled: true
 };
 
 /**
@@ -68,39 +66,6 @@ export default function Settings({ isOpen, onClose }) {
         </div>
 
         <div className="settings-content">
-          <div className="setting-section">
-            <h3>Mode PTT</h3>
-            <p className="setting-description">
-              Choisissez le mode de fonctionnement par défaut du bouton PTT
-            </p>
-
-            <label className="radio-option">
-              <input
-                type="radio"
-                name="pttMode"
-                checked={settings.defaultPTTMode === 'normal'}
-                onChange={() => handleChange('defaultPTTMode', 'normal')}
-              />
-              <div>
-                <strong>Mode normal (Push-To-Talk)</strong>
-                <p>Maintenir le bouton pour parler, relâcher pour arrêter</p>
-              </div>
-            </label>
-
-            <label className="radio-option">
-              <input
-                type="radio"
-                name="pttMode"
-                checked={settings.defaultPTTMode === 'continuous'}
-                onChange={() => handleChange('defaultPTTMode', 'continuous')}
-              />
-              <div>
-                <strong>Mode continu (verrouillé)</strong>
-                <p>Un appui active le micro en continu, un second appui le désactive</p>
-              </div>
-            </label>
-          </div>
-
           <div className="setting-section">
             <h3>Feedback</h3>
 
@@ -112,19 +77,7 @@ export default function Settings({ isOpen, onClose }) {
               />
               <div>
                 <strong>Vibrations</strong>
-                <p>Activer le retour haptique (si disponible)</p>
-              </div>
-            </label>
-
-            <label className="checkbox-option">
-              <input
-                type="checkbox"
-                checked={settings.audioFeedbackEnabled}
-                onChange={(e) => handleChange('audioFeedbackEnabled', e.target.checked)}
-              />
-              <div>
-                <strong>Feedback audio</strong>
-                <p>Sons de confirmation pour les actions</p>
+                <p>Activer le retour haptique lors du verrouillage PTT</p>
               </div>
             </label>
           </div>