DOC-3356: Add missing chat_welcome_message option and update JWT about auth login comment.

Author: kemister85

modules/ROOT/pages/tinymceai-with-jwt-authentication-nodejs.adoc

@@ -187,6 +187,7 @@ Inside the `public` folder where the `index.html` file was created, add the HTML
       plugins: 'tinymceai',
       toolbar: 'tinymceai-chat tinymceai-quickactions tinymceai-review',
       // tinymceai_token_provider fetches a token from the `/jwt` endpoint.
+      // This demo does not verify user session; it simulates an already-authenticated user. Integrate with your auth before returning tokens.
       tinymceai_token_provider: () => {
         return fetch('http://localhost:3000/jwt', {
           method: 'POST',
@@ -219,6 +220,7 @@ tinymce.init({
   toolbar: 'tinymceai-chat tinymceai-quickactions tinymceai-review',
   tinymceai_default_model: 'agent-1',
   tinymceai_allow_model_selection: true,
+  // This demo does not verify user session; it simulates an already-authenticated user. Integrate with your auth before returning tokens.
   tinymceai_token_provider: () => {
     return fetch('http://localhost:3000/jwt', {
       method: 'POST',

modules/ROOT/pages/tinymceai-with-jwt-authentication-php.adoc

@@ -190,6 +190,7 @@ Inside the root directory where the `index.html` file was created, add the HTML
       plugins: 'tinymceai',
       toolbar: 'tinymceai-chat tinymceai-quickactions tinymceai-review',
       // tinymceai_token_provider fetches a token from the `/jwt.php` endpoint.
+      // This demo does not verify user session; it simulates an already-authenticated user. Integrate with your auth before returning tokens.
       tinymceai_token_provider: () => {
         return fetch('http://localhost:3000/jwt.php', {
           method: 'POST',
@@ -222,6 +223,7 @@ tinymce.init({
   toolbar: 'tinymceai-chat tinymceai-quickactions tinymceai-review',
   tinymceai_default_model: 'agent-1',
   tinymceai_allow_model_selection: true,
+  // This demo does not verify user session; it simulates an already-authenticated user. Integrate with your auth before returning tokens.
   tinymceai_token_provider: () => {
     return fetch('http://localhost:3000/jwt.php', {
       method: 'POST',

modules/ROOT/partials/configuration/tinymceai_options.adoc

@@ -5,6 +5,11 @@ Configuration options are grouped by the feature they configure. Options in the
 
 These options apply to the plugin overall or to multiple AI features (Chat, Quick Actions, Review).
 
+[TIP]
+====
+For context toolbar use cases (a toolbar that appears when text is selected), use the xref:quickbars.adoc[Quick Toolbars] plugin and configure `+quickbars_selection_toolbar+` instead.
+====
+
 [[content_id]]
 === `+content_id+`
 
@@ -234,6 +239,30 @@ tinymce.init({
 });
 ----
 
+[[tinymceai_chat_welcome_message]]
+=== `+tinymceai_chat_welcome_message+`
+
+Customises the welcome message displayed in the Chat sidebar when starting a new conversation.
+
+*Type:* `+String+`
+
+*Default value:* A default message introducing the AI assistant and its capabilities.
+
+.Example
+[source,js]
+----
+tinymce.init({
+  selector: 'textarea',
+  plugins: 'tinymceai',
+  toolbar: 'tinymceai-chat tinymceai-quickactions tinymceai-review',
+  tinymceai_chat_welcome_message: '<p>Welcome! How can I help you today?</p>',
+  // Required for authentication
+  tinymceai_token_provider: () => {
+    return fetch('/api/token').then(r => r.json());
+  }
+});
+----
+
 [[options-quickactions]]
 == Options for Quick Actions