Improve OpenAI settings help

public/admin.html

@@ -165,8 +165,13 @@
               </label>
               <label class="setting-switch">Opakovat do otevreni chatu <input id="adminSoundRepeat" type="checkbox"></label>
               <button id="adminSoundTest" type="button">Otestovat zvuk</button>
-              <fieldset class="effect-settings">
+              <fieldset class="effect-settings ai-settings">
                 <legend>AI preklady</legend>
+                <p class="ai-help">
+                  OpenAI API key vytvoris v
+                  <a href="https://platform.openai.com/api-keys" target="_blank" rel="noopener noreferrer">OpenAI Platform / API keys</a>.
+                  Klic se ulozi jen pro tento projekt a v BO se potom zobrazi jen maskovane.
+                </p>
                 <label><input id="translationEnabled" type="checkbox"> zapnout preklady</label>
                 <label>Jazyk operatora
                   <select id="operatorLanguage">
@@ -177,11 +182,11 @@
                     <option value="de">Nemcina</option>
                   </select>
                 </label>
-                <label>OpenAI API key
+                <label class="full-row">OpenAI API key
                   <input id="openaiApiKey" type="password" autocomplete="off" placeholder="sk-...">
                   <small id="openaiApiKeyStatus">Klic neni ulozeny.</small>
                 </label>
-                <label>OpenAI model
+                <label class="full-row">OpenAI model
                   <span class="model-row">
                     <select id="translationModel"></select>
                     <button id="refreshAiModels" type="button">Obnovit</button>