🌐 (app) change to english by default

src/components/ZoneMusic.vue

@@ -2,7 +2,7 @@
   <div class="zone-music">
     <div class="pm-field">
       <label for="use-music" data-pm-holder>
-        <span :class="{ disabled: withMusic }">concentré</span>
+        <span :class="{ disabled: withMusic }">Focus</span>
         <input
           type="checkbox"
           name="use-music"
@@ -11,7 +11,7 @@
           @change="setWithMusic(!withMusic)"
           data-pm-checkbox-toggle
         />
-        <span :class="{ disabled: !withMusic }">détente</span>
+        <span :class="{ disabled: !withMusic }">Chill</span>
       </label>
     </div>
     <ChilledMusic v-if="withMusic" :play="play" @play="play" @pause="pause" />