Works now

app/MindWork AI Studio/Assistants/I18N/allTexts.lua

@@ -1594,15 +1594,30 @@ UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1142475422"] = "Are you s
 -- Stop generation
 UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1317408357"] = "Stop generation"
 
+-- Insert heading formatting
+UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1347686985"] = "Insert heading formatting"
+
 -- Save chat
 UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1516264254"] = "Save chat"
 
+-- Insert italic formatting
+UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T182467363"] = "Insert italic formatting"
+
 -- Type your input here...
 UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1849313532"] = "Type your input here..."
 
+-- Insert bulleted list formatting
+UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1850228954"] = "Insert bulleted list formatting"
+
 -- Your Prompt (use selected instance '{0}', provider '{1}')
 UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T1967611328"] = "Your Prompt (use selected instance '{0}', provider '{1}')"
 
+-- Insert code formatting
+UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T2278685708"] = "Insert code formatting"
+
+-- Insert bold formatting
+UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T265791106"] = "Insert bold formatting"
+
 -- Profile usage is disabled according to your chat template settings.
 UI_TEXT_CONTENT["AISTUDIO::COMPONENTS::CHATCOMPONENT::T2670286472"] = "Profile usage is disabled according to your chat template settings."
 

app/MindWork AI Studio/Components/ChatComponent.razor

@@ -55,6 +55,22 @@
                 Style="@this.UserInputStyle"/>
         </MudElement>
         <MudToolBar WrapContent="true" Gutters="@false" Class="border border-solid rounded" Style="border-color: lightgrey;">
+            <MudTooltip Text="@T("Insert code formatting")" Placement="@TOOLBAR_TOOLTIP_PLACEMENT">
+                <MudIconButton Icon="@Icons.Material.Filled.Code" OnClick="() => this.ApplyMarkdownFormat(MARKDOWN_CODE)" Disabled="@this.IsInputForbidden()"/>
+            </MudTooltip>
+            <MudTooltip Text="@T("Insert bold formatting")" Placement="@TOOLBAR_TOOLTIP_PLACEMENT">
+                <MudIconButton Icon="@Icons.Material.Filled.FormatBold" OnClick="() => this.ApplyMarkdownFormat(MARKDOWN_BOLD)" Disabled="@this.IsInputForbidden()"/>
+            </MudTooltip>
+            <MudTooltip Text="@T("Insert italic formatting")" Placement="@TOOLBAR_TOOLTIP_PLACEMENT">
+                <MudIconButton Icon="@Icons.Material.Filled.FormatItalic" OnClick="() => this.ApplyMarkdownFormat(MARKDOWN_ITALIC)" Disabled="@this.IsInputForbidden()"/>
+            </MudTooltip>
+            <MudTooltip Text="@T("Insert heading formatting")" Placement="@TOOLBAR_TOOLTIP_PLACEMENT">
+                <MudIconButton Icon="@Icons.Material.Filled.TextFields" OnClick="() => this.ApplyMarkdownFormat(MARKDOWN_HEADING)" Disabled="@this.IsInputForbidden()"/>
+            </MudTooltip>
+            <MudTooltip Text="@T("Insert bulleted list formatting")" Placement="@TOOLBAR_TOOLTIP_PLACEMENT">
+                <MudIconButton Icon="@Icons.Material.Filled.FormatListBulleted" OnClick="() => this.ApplyMarkdownFormat(MARKDOWN_BULLET_LIST)" Disabled="@this.IsInputForbidden()"/>
+            </MudTooltip>
+
             @if (
                 this.SettingsManager.ConfigurationData.Workspace.StorageBehavior is not WorkspaceStorageBehavior.DISABLE_WORKSPACES
                 && this.SettingsManager.ConfigurationData.Workspace.DisplayBehavior is WorkspaceDisplayBehavior.TOGGLE_OVERLAY)

app/MindWork AI Studio/Components/ChatComponent.razor.cs

@@ -6,6 +6,7 @@ using AIStudio.Settings.DataModel;
 
 using Microsoft.AspNetCore.Components;
 using Microsoft.AspNetCore.Components.Web;
+using Microsoft.JSInterop;
 
 using DialogOptions = AIStudio.Dialogs.DialogOptions;
 
@@ -13,6 +14,13 @@ namespace AIStudio.Components;
 
 public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
 {
+    private const string CHAT_INPUT_ID = "chat-user-input";
+    private const string MARKDOWN_CODE = "code";
+    private const string MARKDOWN_BOLD = "bold";
+    private const string MARKDOWN_ITALIC = "italic";
+    private const string MARKDOWN_HEADING = "heading";
+    private const string MARKDOWN_BULLET_LIST = "bullet_list";
+    
     [Parameter]
     public ChatThread? ChatThread { get; set; }
     
@@ -37,6 +45,9 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
     [Inject]
     private IDialogService DialogService { get; init; } = null!;
     
+    [Inject]
+    private IJSRuntime JsRuntime { get; init; } = null!;
+
     private const Placement TOOLBAR_TOOLTIP_PLACEMENT = Placement.Top;
     private static readonly Dictionary<string, object?> USER_INPUT_ATTRIBUTES = new();
 
@@ -73,6 +84,7 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
         
         // Configure the spellchecking for the user input:
         this.SettingsManager.InjectSpellchecking(USER_INPUT_ATTRIBUTES);
+        USER_INPUT_ATTRIBUTES["id"] = CHAT_INPUT_ID;
 
         // Get the preselected profile:
         this.currentProfile = this.SettingsManager.GetPreselectedProfile(Tools.Components.CHAT);
@@ -464,6 +476,18 @@ public partial class ChatComponent : MSGComponentBase, IAsyncDisposable
         }
     }
 
+    private async Task ApplyMarkdownFormat(string formatType)
+    {
+        if (this.IsInputForbidden())
+            return;
+
+        if(this.dataSourceSelectionComponent?.IsVisible ?? false)
+            this.dataSourceSelectionComponent.Hide();
+
+        this.userInput = await this.JsRuntime.InvokeAsync<string>("formatChatInputMarkdown", CHAT_INPUT_ID, formatType);
+        this.hasUnsavedChanges = true;
+    }
+    
     private async Task SendMessage(bool reuseLastUserPrompt = false)
     {
         if (!this.IsProviderSelected)

app/MindWork AI Studio/wwwroot/app.js

@@ -26,3 +26,108 @@ window.clearDiv = function (divName) {
 window.scrollToBottom = function(element) {
     element.scrollIntoView({ behavior: 'smooth', block: 'end', inline: 'nearest' });
 }
+
+window.formatChatInputMarkdown = function (inputId, formatType) {
+    let input = document.getElementById(inputId)
+    if (input && input.tagName !== 'TEXTAREA' && input.tagName !== 'INPUT')
+        input = input.querySelector('textarea, input')
+
+    if (!input)
+        return ''
+
+    input.focus()
+
+    const value = input.value ?? ''
+    const start = input.selectionStart ?? value.length
+    const end = input.selectionEnd ?? value.length
+    const hasSelection = end > start
+    const selectedText = value.substring(start, end)
+
+    let insertedText = ''
+    let selectionStart = start
+    let selectionEnd = start
+
+    switch (formatType) {
+        case 'bold': {
+            const text = hasSelection ? selectedText : 'bold text'
+            insertedText = `**${text}**`
+            selectionStart = start + 2
+            selectionEnd = selectionStart + text.length
+            break
+        }
+
+        case 'italic': {
+            const text = hasSelection ? selectedText : 'italic text'
+            insertedText = `*${text}*`
+            selectionStart = start + 1
+            selectionEnd = selectionStart + text.length
+            break
+        }
+
+        case 'heading': {
+            if (hasSelection) {
+                insertedText = selectedText
+                    .split('\n')
+                    .map(line => line.startsWith('# ') ? line : `# ${line}`)
+                    .join('\n')
+
+                selectionStart = start
+                selectionEnd = start + insertedText.length
+            } else {
+                const text = 'Heading'
+                insertedText = `# ${text}`
+                selectionStart = start + 2
+                selectionEnd = selectionStart + text.length
+            }
+
+            break
+        }
+
+        case 'bullet_list': {
+            if (hasSelection) {
+                insertedText = selectedText
+                    .split('\n')
+                    .map(line => line.startsWith('- ') ? line : `- ${line}`)
+                    .join('\n')
+
+                selectionStart = start
+                selectionEnd = start + insertedText.length
+            } else {
+                insertedText = '- '
+                selectionStart = start + 2
+                selectionEnd = start + insertedText.length
+            }
+
+            break
+        }
+
+        case 'code':
+        default: {
+            if (hasSelection) {
+                if (selectedText.includes('\n')) {
+                    insertedText = `\`\`\`\n${selectedText}\n\`\`\``
+                    selectionStart = start + 4
+                    selectionEnd = selectionStart + selectedText.length
+                } else {
+                    insertedText = `\`${selectedText}\``
+                    selectionStart = start + 1
+                    selectionEnd = selectionStart + selectedText.length
+                }
+            } else {
+                const text = 'code'
+                insertedText = `\`\`\`\n${text}\n\`\`\``
+                selectionStart = start + 4
+                selectionEnd = selectionStart + text.length
+            }
+
+            break
+        }
+    }
+
+    const nextValue = value.slice(0, start) + insertedText + value.slice(end)
+    input.value = nextValue
+    input.setSelectionRange(selectionStart, selectionEnd)
+    input.dispatchEvent(new Event('input', { bubbles: true }))
+
+    return nextValue
+}