From 57f0f39f4dc834c274aaa417e74ce0f25dd9742b Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Wed, 25 Feb 2026 21:14:21 +0100
Subject: [PATCH 1/5] Enhanced Markdown security by using SecurePipeline

---
 .../Chat/ContentBlockComponent.razor          |   6 +-
 .../Chat/ContentBlockComponent.razor.cs       | 109 +++++++++++++++++-
 .../Components/Changelog.razor                |   2 +-
 .../Components/ChatComponent.razor            |   3 +-
 .../Components/ConfidenceInfo.razor           |   4 +-
 .../Settings/SettingsPanelProviders.razor     |   2 +-
 .../Dialogs/DocumentCheckDialog.razor         |   4 +-
 .../Dialogs/PandocDialog.razor                |   4 +-
 .../Dialogs/UpdateDialog.razor                |   4 +-
 app/MindWork AI Studio/Pages/Home.razor       |   6 +-
 .../Pages/Information.razor                   |   2 +-
 app/MindWork AI Studio/Tools/Markdown.cs      |  11 +-
 .../wwwroot/changelog/v26.3.1.md              |   3 +-
 13 files changed, 135 insertions(+), 25 deletions(-)

diff --git a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor
index 7c09ae78a..f3f2f5285 100644
--- a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
+++ b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
@@ -96,10 +96,10 @@
                             }
                             else
                             {
-                                <MudMarkdown Value="@textContent.Text.RemoveThinkTags().Trim()" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" />
+                                <MudMarkdown Value="@this.NormalizeMarkdownForRendering(textContent.Text)" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline" />
                                 @if (textContent.Sources.Count > 0)
                                 {
-                                    <MudMarkdown Value="@textContent.Sources.ToMarkdown()" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" />
+                                    <MudMarkdown Value="@textContent.Sources.ToMarkdown()" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline" />
                                 }
                             }
                         }
@@ -135,4 +135,4 @@
             }
         }
     </MudCardContent>
-</MudCard>
\ No newline at end of file
+</MudCard>
diff --git a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs
index e29a016d9..17894232a 100644
--- a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs	
+++ b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs	
@@ -10,6 +10,18 @@ namespace AIStudio.Chat;
 /// </summary>
 public partial class ContentBlockComponent : MSGComponentBase
 {
+    private static readonly string[] HTML_TAG_MARKERS =
+    [
+        "<!doctype",
+        "<html",
+        "<head",
+        "<body",
+        "<style",
+        "<script",
+        "<iframe",
+        "<svg",
+    ];
+
     /// <summary>
     /// The role of the chat content block.
     /// </summary>
@@ -68,18 +80,36 @@ public partial class ContentBlockComponent : MSGComponentBase
     private RustService RustService { get; init; } = null!;
 
     private bool HideContent { get; set; }
+    private bool hasRenderHash;
+    private int lastRenderHash;
 
     #region Overrides of ComponentBase
 
     protected override async Task OnInitializedAsync()
     {
-        // Register the streaming events:
-        this.Content.StreamingDone = this.AfterStreaming;
-        this.Content.StreamingEvent = () => this.InvokeAsync(this.StateHasChanged);
-        
+        this.RegisterStreamingEvents();
         await base.OnInitializedAsync();
     }
 
+    protected override Task OnParametersSetAsync()
+    {
+        this.RegisterStreamingEvents();
+        return base.OnParametersSetAsync();
+    }
+
+    protected override bool ShouldRender()
+    {
+        var currentRenderHash = this.CreateRenderHash();
+        if (!this.hasRenderHash || currentRenderHash != this.lastRenderHash)
+        {
+            this.lastRenderHash = currentRenderHash;
+            this.hasRenderHash = true;
+            return true;
+        }
+
+        return false;
+    }
+
     /// <summary>
     /// Gets called when the content stream ended.
     /// </summary>
@@ -111,6 +141,47 @@ await this.InvokeAsync(async () =>
         });
     }
 
+    private void RegisterStreamingEvents()
+    {
+        this.Content.StreamingDone = this.AfterStreaming;
+        this.Content.StreamingEvent = () => this.InvokeAsync(this.StateHasChanged);
+    }
+
+    private int CreateRenderHash()
+    {
+        var hash = new HashCode();
+        hash.Add(this.Role);
+        hash.Add(this.Type);
+        hash.Add(this.Time);
+        hash.Add(this.Class);
+        hash.Add(this.IsLastContentBlock);
+        hash.Add(this.IsSecondToLastBlock);
+        hash.Add(this.HideContent);
+        hash.Add(this.SettingsManager.IsDarkMode);
+        hash.Add(this.RegenerateEnabled());
+        hash.Add(this.Content.InitialRemoteWait);
+        hash.Add(this.Content.IsStreaming);
+        hash.Add(this.Content.FileAttachments.Count);
+        hash.Add(this.Content.Sources.Count);
+
+        switch (this.Content)
+        {
+            case ContentText text:
+                var textValue = text.Text ?? string.Empty;
+                hash.Add(textValue.Length);
+                hash.Add(textValue.GetHashCode(StringComparison.Ordinal));
+                hash.Add(text.Sources.Count);
+                break;
+
+            case ContentImage image:
+                hash.Add(image.SourceType);
+                hash.Add(image.Source);
+                break;
+        }
+
+        return hash.ToHashCode();
+    }
+
     #endregion
     
     private string CardClasses => $"my-2 rounded-lg {this.Class}";
@@ -121,6 +192,34 @@ await this.InvokeAsync(async () =>
     {
         CodeBlock = { Theme = this.CodeColorPalette },
     };
+
+    private string NormalizeMarkdownForRendering(string text)
+    {
+        var cleaned = text.RemoveThinkTags().Trim();
+        if (string.IsNullOrWhiteSpace(cleaned))
+            return string.Empty;
+
+        if (cleaned.Contains("```", StringComparison.Ordinal))
+            return cleaned;
+
+        if (LooksLikeRawHtml(cleaned))
+            return $"```html{Environment.NewLine}{cleaned}{Environment.NewLine}```";
+
+        return cleaned;
+    }
+
+    private static bool LooksLikeRawHtml(string text)
+    {
+        var content = text.TrimStart();
+        if (!content.StartsWith("<", StringComparison.Ordinal))
+            return false;
+
+        foreach (var marker in HTML_TAG_MARKERS)
+            if (content.Contains(marker, StringComparison.OrdinalIgnoreCase))
+                return true;
+
+        return content.Contains("</", StringComparison.Ordinal) || content.Contains("/>", StringComparison.Ordinal);
+    }
     
     private async Task RemoveBlock()
     {
@@ -194,4 +293,4 @@ private async Task OpenAttachmentsDialog()
         var result = await ReviewAttachmentsDialog.OpenDialogAsync(this.DialogService, this.Content.FileAttachments.ToHashSet());
         this.Content.FileAttachments = result.ToList();
     }
-}
\ No newline at end of file
+}
diff --git a/app/MindWork AI Studio/Components/Changelog.razor b/app/MindWork AI Studio/Components/Changelog.razor
index 1afebfc37..2d573afbc 100644
--- a/app/MindWork AI Studio/Components/Changelog.razor	
+++ b/app/MindWork AI Studio/Components/Changelog.razor	
@@ -6,4 +6,4 @@
     }
 </MudSelect>
 
-<MudMarkdown Value="@this.LogContent" Props="Markdown.DefaultConfig"/>
\ No newline at end of file
+<MudMarkdown Value="@this.LogContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
diff --git a/app/MindWork AI Studio/Components/ChatComponent.razor b/app/MindWork AI Studio/Components/ChatComponent.razor
index 52b82b9bc..1467c01e8 100644
--- a/app/MindWork AI Studio/Components/ChatComponent.razor	
+++ b/app/MindWork AI Studio/Components/ChatComponent.razor	
@@ -16,6 +16,7 @@
                 @if (!block.HideFromUser)
                 {
                     <ContentBlockComponent
+                        @key="@block"
                         Role="@block.Role"
                         Type="@block.ContentType"
                         Time="@block.Time"
@@ -126,4 +127,4 @@
             <MudIconButton />
         </MudToolBar>
     </FooterContent>
-</InnerScrolling>
\ No newline at end of file
+</InnerScrolling>
diff --git a/app/MindWork AI Studio/Components/ConfidenceInfo.razor b/app/MindWork AI Studio/Components/ConfidenceInfo.razor
index f27fe58eb..ed7c45ef6 100644
--- a/app/MindWork AI Studio/Components/ConfidenceInfo.razor	
+++ b/app/MindWork AI Studio/Components/ConfidenceInfo.razor	
@@ -28,7 +28,7 @@
                 <MudText Typo="Typo.h6">
                     @T("Description")
                 </MudText>
-                <MudMarkdown Value="@this.currentConfidence.Description"/>
+                <MudMarkdown Value="@this.currentConfidence.Description" MarkdownPipeline="Markdown.SecurePipeline"/>
 
                 @if (this.currentConfidence.Sources.Count > 0)
                 {
@@ -67,4 +67,4 @@
             </MudCardActions>
         </MudCard>
     </MudPopover>
-</div>
\ No newline at end of file
+</div>
diff --git a/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor b/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor
index f6704dc5d..f89d7b529 100644
--- a/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor	
+++ b/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor	
@@ -104,7 +104,7 @@
                         @context.ToName()
                     </MudTd>
                     <MudTd>
-                        <MudMarkdown Value="@context.GetConfidence(this.SettingsManager).Description"/>
+                        <MudMarkdown Value="@context.GetConfidence(this.SettingsManager).Description" MarkdownPipeline="Markdown.SecurePipeline"/>
                     </MudTd>
                     <MudTd Style="vertical-align: top;">
                         <MudMenu StartIcon="@Icons.Material.Filled.Security" EndIcon="@Icons.Material.Filled.KeyboardArrowDown" Label="@this.GetCurrentConfidenceLevelName(context)" Variant="Variant.Filled" Style="@this.SetCurrentConfidenceLevelColorStyle(context)">
diff --git a/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor b/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor
index f3b758373..dc2ee563a 100644
--- a/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor	
@@ -54,7 +54,7 @@
                             Class="ma-2 pe-4"
                             HelperText="@T("This is the content we loaded from your file — including headings, lists, and formatting. Use this to verify your file loads as expected.")">
                             <div style="max-height: 40vh; overflow-y: auto;">
-                                <MudMarkdown Value="@this.FileContent" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling"/>
+                                <MudMarkdown Value="@this.FileContent" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline"/>
                             </div>
                         </MudField>
                     </MudTabPanel>
@@ -83,4 +83,4 @@
             @T("Close")
         </MudButton>
     </DialogActions>
-</MudDialog>
\ No newline at end of file
+</MudDialog>
diff --git a/app/MindWork AI Studio/Dialogs/PandocDialog.razor b/app/MindWork AI Studio/Dialogs/PandocDialog.razor
index 2914b38e4..f9638ff99 100644
--- a/app/MindWork AI Studio/Dialogs/PandocDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/PandocDialog.razor	
@@ -30,7 +30,7 @@
                     }
                     else if (!string.IsNullOrWhiteSpace(this.licenseText))
                     {
-                        <MudMarkdown Value="@this.licenseText" Props="Markdown.DefaultConfig"/>
+                        <MudMarkdown Value="@this.licenseText" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
                     }
                 </ExpansionPanel>
 
@@ -226,4 +226,4 @@
             }
         }
     </DialogActions>
-</MudDialog>
\ No newline at end of file
+</MudDialog>
diff --git a/app/MindWork AI Studio/Dialogs/UpdateDialog.razor b/app/MindWork AI Studio/Dialogs/UpdateDialog.razor
index 62f3dd7ac..3eaa6db99 100644
--- a/app/MindWork AI Studio/Dialogs/UpdateDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/UpdateDialog.razor	
@@ -5,7 +5,7 @@
             <MudIcon Icon="@Icons.Material.Filled.Update" Size="Size.Large" Class="mr-3"/>
             @this.HeaderText
         </MudText>
-        <MudMarkdown Value="@this.UpdateResponse.Changelog" Props="Markdown.DefaultConfig"/>
+        <MudMarkdown Value="@this.UpdateResponse.Changelog" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
     </DialogContent>
     <DialogActions>
         <MudButton OnClick="@this.Cancel" Variant="Variant.Filled">
@@ -15,4 +15,4 @@
             @T("Install now")
         </MudButton>
     </DialogActions>
-</MudDialog>
\ No newline at end of file
+</MudDialog>
diff --git a/app/MindWork AI Studio/Pages/Home.razor b/app/MindWork AI Studio/Pages/Home.razor
index 53d48e6ed..43118b243 100644
--- a/app/MindWork AI Studio/Pages/Home.razor	
+++ b/app/MindWork AI Studio/Pages/Home.razor	
@@ -27,7 +27,7 @@
             </ExpansionPanel>
 
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.EventNote" HeaderText="@T("Last Changelog")">
-                <MudMarkdown Value="@this.LastChangeContent" Props="Markdown.DefaultConfig"/>
+                <MudMarkdown Value="@this.LastChangeContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
             </ExpansionPanel>
 
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.Lightbulb" HeaderText="@T("Vision")">
@@ -35,9 +35,9 @@
             </ExpansionPanel>
             
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.RocketLaunch" HeaderText="@T("Quick Start Guide")">
-                <MudMarkdown Props="Markdown.DefaultConfig" Value="@QUICK_START_GUIDE"/>
+                <MudMarkdown Props="Markdown.DefaultConfig" Value="@QUICK_START_GUIDE" MarkdownPipeline="Markdown.SecurePipeline"/>
             </ExpansionPanel>
 
         </MudExpansionPanels>
     </InnerScrolling>
-</div>
\ No newline at end of file
+</div>
diff --git a/app/MindWork AI Studio/Pages/Information.razor b/app/MindWork AI Studio/Pages/Information.razor
index 435a6a564..e93892379 100644
--- a/app/MindWork AI Studio/Pages/Information.razor	
+++ b/app/MindWork AI Studio/Pages/Information.razor	
@@ -297,7 +297,7 @@
                 </MudGrid>
             </ExpansionPanel>
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.Verified" HeaderText="License: FSL-1.1-MIT">
-                <MudMarkdown Value="@LICENSE" Props="Markdown.DefaultConfig"/>
+                <MudMarkdown Value="@LICENSE" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
             </ExpansionPanel>
         </MudExpansionPanels>
     </InnerScrolling>
diff --git a/app/MindWork AI Studio/Tools/Markdown.cs b/app/MindWork AI Studio/Tools/Markdown.cs
index 0ecf37744..24946386b 100644
--- a/app/MindWork AI Studio/Tools/Markdown.cs	
+++ b/app/MindWork AI Studio/Tools/Markdown.cs	
@@ -1,7 +1,16 @@
+using Markdig;
+
 namespace AIStudio.Tools;
 
 public static class Markdown
 {
+    private static readonly MarkdownPipeline SAFE_MARKDOWN_PIPELINE = new MarkdownPipelineBuilder()
+        .UseAdvancedExtensions()
+        .DisableHtml()
+        .Build();
+
+    public static MarkdownPipeline SecurePipeline => SAFE_MARKDOWN_PIPELINE;
+
     public static MudMarkdownProps DefaultConfig => new()
     {
         Heading =
@@ -19,4 +28,4 @@ public static class Markdown
             },
         }
     };
-}
\ No newline at end of file
+}
diff --git a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md
index 840e2947c..7f4e3b461 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
@@ -2,4 +2,5 @@
 - Improved the performance by caching the OS language detection and requesting the user language only once per app start.
 - Improved the user-language logging by limiting language detection logs to a single entry per app start.
 - Improved the logbook readability by removing non-readable special characters from log entries.
-- Improved the logbook reliability by significantly reducing duplicate log entries.
\ No newline at end of file
+- Improved the logbook reliability by significantly reducing duplicate log entries.
+- Fixed an issue where the app could turn white or appear invisible in certain chats after HTML-like content was shown.
\ No newline at end of file

From 0fdaf19168799074512a90e2a8f92044546b56bc Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Wed, 25 Feb 2026 21:14:39 +0100
Subject: [PATCH 2/5] Added manual integration tests

---
 tests/README.md                               |  16 +++
 tests/integration_tests/README.md             |  12 ++
 .../chat/chat_rendering_regression_tests.md   | 120 ++++++++++++++++++
 3 files changed, 148 insertions(+)
 create mode 100644 tests/README.md
 create mode 100644 tests/integration_tests/README.md
 create mode 100644 tests/integration_tests/chat/chat_rendering_regression_tests.md

diff --git a/tests/README.md b/tests/README.md
new file mode 100644
index 000000000..1856f2175
--- /dev/null
+++ b/tests/README.md
@@ -0,0 +1,16 @@
+# Test Documentation
+
+This directory stores manual and automated test definitions for MindWork AI Studio.
+
+## Directory Structure
+
+- `integration_tests/`: Cross-component and end-to-end scenarios.
+
+## Authoring Rules
+
+- Use US English.
+- Keep each feature area in its own Markdown file.
+- Prefer stable test IDs (for example: `TC-CHAT-001`).
+- Record expected behavior for:
+  - known vulnerable baseline builds (if relevant),
+  - current fixed builds.
diff --git a/tests/integration_tests/README.md b/tests/integration_tests/README.md
new file mode 100644
index 000000000..aa23175e4
--- /dev/null
+++ b/tests/integration_tests/README.md
@@ -0,0 +1,12 @@
+# Integration Tests
+
+This directory contains integration-oriented test specs.
+
+## Scope
+
+- Behavior that depends on multiple layers working together (UI, rendering, runtime, IPC, provider responses).
+- Regressions that are hard to catch with unit tests only.
+
+## Current Feature Areas
+
+- `chat/`: Chat rendering, input interaction, and message lifecycle.
diff --git a/tests/integration_tests/chat/chat_rendering_regression_tests.md b/tests/integration_tests/chat/chat_rendering_regression_tests.md
new file mode 100644
index 000000000..ba773f54a
--- /dev/null
+++ b/tests/integration_tests/chat/chat_rendering_regression_tests.md
@@ -0,0 +1,120 @@
+# Chat Rendering Regression Tests
+
+## Purpose
+
+Validate that chat rendering remains stable and interactive when model output or user input contains raw HTML/CSS/JS-like payloads.
+
+## Test Type
+
+Manual regression and integration checks.
+
+## Preconditions
+
+1. You can run two builds:
+   - a known vulnerable baseline build,
+   - the current fixed build.
+2. At least one provider is configured and can answer prompts.
+3. Open the Chat page.
+
+## Execution Flow (for each test case)
+
+1. Copy the test prompt exactly into the user prompt field.
+2. Send the prompt.
+3. Observe behavior immediately after send.
+4. If the UI is still visible, type additional text in the prompt input.
+5. Repeat on both builds.
+
+## Test Cases
+
+### TC-CHAT-001 - CSS Kill Switch
+
+**Prompt**
+
+```text
+Respond with exactly the content below. No explanations, no Markdown code fences, no backticks.
+
+<style>
+* { visibility: hidden !important; }
+html, body { background: white !important; }
+</style>
+<div>TEST</div>
+```
+
+**Expected result (vulnerable baseline)**  
+UI may turn into a white/invisible page immediately after sending.
+
+**Expected result (fixed build)**  
+Chat stays visible and usable. Content is rendered as inert text/code, not active page styling.
+
+---
+
+### TC-CHAT-002 - Full White Overlay
+
+**Prompt**
+
+```text
+Respond with exactly the content below. No explanations, no Markdown code fences, no backticks.
+
+<style>
+html, body { overflow: hidden !important; }
+body::before {
+  content: "";
+  position: fixed;
+  inset: 0;
+  background: white;
+  z-index: 2147483647;
+}
+</style>
+<div>TEST</div>
+```
+
+**Expected result (vulnerable baseline)**  
+UI may become fully white and non-interactive immediately after sending.
+
+**Expected result (fixed build)**  
+No overlay takes over the app. Chat remains interactive.
+
+---
+
+### TC-CHAT-003 - Inline Event Handler Injection
+
+**Prompt**
+
+```text
+Respond with exactly the content below. No explanations, no Markdown code fences, no backticks.
+
+<img src="x" onerror="document.body.innerHTML=''; document.body.style.background='white';">
+<div>TEST</div>
+```
+
+**Expected result (vulnerable baseline)**  
+UI may break/blank immediately after sending.
+
+**Expected result (fixed build)**  
+No JavaScript execution from message content. Chat remains stable.
+
+---
+
+### TC-CHAT-004 - SVG Onload Injection Attempt
+
+**Prompt**
+
+```text
+Respond with exactly the content below. No explanations, no Markdown code fences, no backticks.
+
+<svg xmlns="http://www.w3.org/2000/svg" onload="document.documentElement.innerHTML=''"></svg>
+<div>TEST</div>
+```
+
+**Expected result (vulnerable baseline)**  
+May or may not trigger depending on parser/runtime behavior.
+
+**Expected result (fixed build)**  
+No script-like execution from content. Chat remains stable and interactive.
+
+## Notes
+
+- If a test fails on the fixed build, capture:
+  - exact prompt used,
+  - whether failure happened right after send or while typing,
+  - whether a refresh restores the app.

From 1353345311384244adaf1697ed1f580b2b99aadb Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Wed, 25 Feb 2026 21:27:48 +0100
Subject: [PATCH 3/5] Switched to SAFE_MARKDOWN_PIPELINE

---
 app/MindWork AI Studio/Chat/ContentBlockComponent.razor    | 6 +++---
 app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs | 7 ++++---
 app/MindWork AI Studio/Components/Changelog.razor          | 2 +-
 app/MindWork AI Studio/Components/ChatComponent.razor      | 2 +-
 app/MindWork AI Studio/Components/ConfidenceInfo.razor     | 4 ++--
 .../Components/Settings/SettingsPanelProviders.razor       | 2 +-
 app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor   | 4 ++--
 app/MindWork AI Studio/Dialogs/PandocDialog.razor          | 4 ++--
 app/MindWork AI Studio/Dialogs/UpdateDialog.razor          | 4 ++--
 app/MindWork AI Studio/Pages/Home.razor                    | 6 +++---
 app/MindWork AI Studio/Pages/Information.razor             | 4 ++--
 app/MindWork AI Studio/Tools/Markdown.cs                   | 6 ++----
 12 files changed, 25 insertions(+), 26 deletions(-)

diff --git a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor
index f3f2f5285..579e8bf2f 100644
--- a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
+++ b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor	
@@ -96,10 +96,10 @@
                             }
                             else
                             {
-                                <MudMarkdown Value="@this.NormalizeMarkdownForRendering(textContent.Text)" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline" />
+                                <MudMarkdown Value="@NormalizeMarkdownForRendering(textContent.Text)" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE" />
                                 @if (textContent.Sources.Count > 0)
                                 {
-                                    <MudMarkdown Value="@textContent.Sources.ToMarkdown()" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline" />
+                                    <MudMarkdown Value="@textContent.Sources.ToMarkdown()" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE" />
                                 }
                             }
                         }
@@ -135,4 +135,4 @@
             }
         }
     </MudCardContent>
-</MudCard>
+</MudCard>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs
index 17894232a..29e704870 100644
--- a/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs	
+++ b/app/MindWork AI Studio/Chat/ContentBlockComponent.razor.cs	
@@ -97,6 +97,7 @@ protected override Task OnParametersSetAsync()
         return base.OnParametersSetAsync();
     }
 
+    /// <inheritdoc />
     protected override bool ShouldRender()
     {
         var currentRenderHash = this.CreateRenderHash();
@@ -167,7 +168,7 @@ private int CreateRenderHash()
         switch (this.Content)
         {
             case ContentText text:
-                var textValue = text.Text ?? string.Empty;
+                var textValue = text.Text;
                 hash.Add(textValue.Length);
                 hash.Add(textValue.GetHashCode(StringComparison.Ordinal));
                 hash.Add(text.Sources.Count);
@@ -193,7 +194,7 @@ private int CreateRenderHash()
         CodeBlock = { Theme = this.CodeColorPalette },
     };
 
-    private string NormalizeMarkdownForRendering(string text)
+    private static string NormalizeMarkdownForRendering(string text)
     {
         var cleaned = text.RemoveThinkTags().Trim();
         if (string.IsNullOrWhiteSpace(cleaned))
@@ -293,4 +294,4 @@ private async Task OpenAttachmentsDialog()
         var result = await ReviewAttachmentsDialog.OpenDialogAsync(this.DialogService, this.Content.FileAttachments.ToHashSet());
         this.Content.FileAttachments = result.ToList();
     }
-}
+}
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Components/Changelog.razor b/app/MindWork AI Studio/Components/Changelog.razor
index 2d573afbc..7ee430217 100644
--- a/app/MindWork AI Studio/Components/Changelog.razor	
+++ b/app/MindWork AI Studio/Components/Changelog.razor	
@@ -6,4 +6,4 @@
     }
 </MudSelect>
 
-<MudMarkdown Value="@this.LogContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
+<MudMarkdown Value="@this.LogContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Components/ChatComponent.razor b/app/MindWork AI Studio/Components/ChatComponent.razor
index 1467c01e8..3c49a4b5e 100644
--- a/app/MindWork AI Studio/Components/ChatComponent.razor	
+++ b/app/MindWork AI Studio/Components/ChatComponent.razor	
@@ -127,4 +127,4 @@
             <MudIconButton />
         </MudToolBar>
     </FooterContent>
-</InnerScrolling>
+</InnerScrolling>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Components/ConfidenceInfo.razor b/app/MindWork AI Studio/Components/ConfidenceInfo.razor
index ed7c45ef6..0bf2d0440 100644
--- a/app/MindWork AI Studio/Components/ConfidenceInfo.razor	
+++ b/app/MindWork AI Studio/Components/ConfidenceInfo.razor	
@@ -28,7 +28,7 @@
                 <MudText Typo="Typo.h6">
                     @T("Description")
                 </MudText>
-                <MudMarkdown Value="@this.currentConfidence.Description" MarkdownPipeline="Markdown.SecurePipeline"/>
+                <MudMarkdown Value="@this.currentConfidence.Description" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
 
                 @if (this.currentConfidence.Sources.Count > 0)
                 {
@@ -67,4 +67,4 @@
             </MudCardActions>
         </MudCard>
     </MudPopover>
-</div>
+</div>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor b/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor
index f89d7b529..8a862702c 100644
--- a/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor	
+++ b/app/MindWork AI Studio/Components/Settings/SettingsPanelProviders.razor	
@@ -104,7 +104,7 @@
                         @context.ToName()
                     </MudTd>
                     <MudTd>
-                        <MudMarkdown Value="@context.GetConfidence(this.SettingsManager).Description" MarkdownPipeline="Markdown.SecurePipeline"/>
+                        <MudMarkdown Value="@context.GetConfidence(this.SettingsManager).Description" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
                     </MudTd>
                     <MudTd Style="vertical-align: top;">
                         <MudMenu StartIcon="@Icons.Material.Filled.Security" EndIcon="@Icons.Material.Filled.KeyboardArrowDown" Label="@this.GetCurrentConfidenceLevelName(context)" Variant="Variant.Filled" Style="@this.SetCurrentConfidenceLevelColorStyle(context)">
diff --git a/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor b/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor
index dc2ee563a..8936e04eb 100644
--- a/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/DocumentCheckDialog.razor	
@@ -54,7 +54,7 @@
                             Class="ma-2 pe-4"
                             HelperText="@T("This is the content we loaded from your file — including headings, lists, and formatting. Use this to verify your file loads as expected.")">
                             <div style="max-height: 40vh; overflow-y: auto;">
-                                <MudMarkdown Value="@this.FileContent" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SecurePipeline"/>
+                                <MudMarkdown Value="@this.FileContent" Props="Markdown.DefaultConfig" Styling="@this.MarkdownStyling" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
                             </div>
                         </MudField>
                     </MudTabPanel>
@@ -83,4 +83,4 @@
             @T("Close")
         </MudButton>
     </DialogActions>
-</MudDialog>
+</MudDialog>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Dialogs/PandocDialog.razor b/app/MindWork AI Studio/Dialogs/PandocDialog.razor
index f9638ff99..c4f2ac3e2 100644
--- a/app/MindWork AI Studio/Dialogs/PandocDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/PandocDialog.razor	
@@ -30,7 +30,7 @@
                     }
                     else if (!string.IsNullOrWhiteSpace(this.licenseText))
                     {
-                        <MudMarkdown Value="@this.licenseText" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
+                        <MudMarkdown Value="@this.licenseText" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
                     }
                 </ExpansionPanel>
 
@@ -226,4 +226,4 @@
             }
         }
     </DialogActions>
-</MudDialog>
+</MudDialog>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Dialogs/UpdateDialog.razor b/app/MindWork AI Studio/Dialogs/UpdateDialog.razor
index 3eaa6db99..f53455235 100644
--- a/app/MindWork AI Studio/Dialogs/UpdateDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/UpdateDialog.razor	
@@ -5,7 +5,7 @@
             <MudIcon Icon="@Icons.Material.Filled.Update" Size="Size.Large" Class="mr-3"/>
             @this.HeaderText
         </MudText>
-        <MudMarkdown Value="@this.UpdateResponse.Changelog" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
+        <MudMarkdown Value="@this.UpdateResponse.Changelog" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
     </DialogContent>
     <DialogActions>
         <MudButton OnClick="@this.Cancel" Variant="Variant.Filled">
@@ -15,4 +15,4 @@
             @T("Install now")
         </MudButton>
     </DialogActions>
-</MudDialog>
+</MudDialog>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Pages/Home.razor b/app/MindWork AI Studio/Pages/Home.razor
index 43118b243..eae947abc 100644
--- a/app/MindWork AI Studio/Pages/Home.razor	
+++ b/app/MindWork AI Studio/Pages/Home.razor	
@@ -27,7 +27,7 @@
             </ExpansionPanel>
 
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.EventNote" HeaderText="@T("Last Changelog")">
-                <MudMarkdown Value="@this.LastChangeContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
+                <MudMarkdown Value="@this.LastChangeContent" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
             </ExpansionPanel>
 
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.Lightbulb" HeaderText="@T("Vision")">
@@ -35,9 +35,9 @@
             </ExpansionPanel>
             
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.RocketLaunch" HeaderText="@T("Quick Start Guide")">
-                <MudMarkdown Props="Markdown.DefaultConfig" Value="@QUICK_START_GUIDE" MarkdownPipeline="Markdown.SecurePipeline"/>
+                <MudMarkdown Props="Markdown.DefaultConfig" Value="@QUICK_START_GUIDE" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
             </ExpansionPanel>
 
         </MudExpansionPanels>
     </InnerScrolling>
-</div>
+</div>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Pages/Information.razor b/app/MindWork AI Studio/Pages/Information.razor
index e93892379..a859a142e 100644
--- a/app/MindWork AI Studio/Pages/Information.razor	
+++ b/app/MindWork AI Studio/Pages/Information.razor	
@@ -297,8 +297,8 @@
                 </MudGrid>
             </ExpansionPanel>
             <ExpansionPanel HeaderIcon="@Icons.Material.Filled.Verified" HeaderText="License: FSL-1.1-MIT">
-                <MudMarkdown Value="@LICENSE" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SecurePipeline"/>
+                <MudMarkdown Value="@LICENSE" Props="Markdown.DefaultConfig" MarkdownPipeline="Markdown.SAFE_MARKDOWN_PIPELINE"/>
             </ExpansionPanel>
         </MudExpansionPanels>
     </InnerScrolling>
-</div>
+</div>
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Tools/Markdown.cs b/app/MindWork AI Studio/Tools/Markdown.cs
index 24946386b..49a2309c6 100644
--- a/app/MindWork AI Studio/Tools/Markdown.cs	
+++ b/app/MindWork AI Studio/Tools/Markdown.cs	
@@ -4,13 +4,11 @@ namespace AIStudio.Tools;
 
 public static class Markdown
 {
-    private static readonly MarkdownPipeline SAFE_MARKDOWN_PIPELINE = new MarkdownPipelineBuilder()
+    public static readonly MarkdownPipeline SAFE_MARKDOWN_PIPELINE = new MarkdownPipelineBuilder()
         .UseAdvancedExtensions()
         .DisableHtml()
         .Build();
 
-    public static MarkdownPipeline SecurePipeline => SAFE_MARKDOWN_PIPELINE;
-
     public static MudMarkdownProps DefaultConfig => new()
     {
         Heading =
@@ -28,4 +26,4 @@ public static class Markdown
             },
         }
     };
-}
+}
\ No newline at end of file

From ed417a15b54bfc3818a5ae24fae266fa08bb4b86 Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Wed, 25 Feb 2026 21:31:41 +0100
Subject: [PATCH 4/5] Updated changelog

---
 app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md
index 7f4e3b461..0ec7db3da 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
@@ -3,4 +3,4 @@
 - Improved the user-language logging by limiting language detection logs to a single entry per app start.
 - Improved the logbook readability by removing non-readable special characters from log entries.
 - Improved the logbook reliability by significantly reducing duplicate log entries.
-- Fixed an issue where the app could turn white or appear invisible in certain chats after HTML-like content was shown.
\ No newline at end of file
+- Fixed an issue where the app could turn white or appear invisible in certain chats after HTML-like content was shown. Thanks Inga for reporting this issue and providing some context on how to reproduce it.
\ No newline at end of file

From a69a8746422dd7c7d4ca9027e1d988066c27c430 Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <SommerEngineering@users.noreply.github.com>
Date: Wed, 25 Feb 2026 21:37:02 +0100
Subject: [PATCH 5/5] Updated changelog

---
 app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md
index 0ec7db3da..f5bd763bd 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v26.3.1.md	
@@ -1,5 +1,6 @@
 # v26.3.1, build 235 (2026-03-xx xx:xx UTC)
 - Improved the performance by caching the OS language detection and requesting the user language only once per app start.
+- Improved the chat performance by reducing unnecessary UI updates, making chats smoother and more responsive, especially in longer conversations.
 - Improved the user-language logging by limiting language detection logs to a single entry per app start.
 - Improved the logbook readability by removing non-readable special characters from log entries.
 - Improved the logbook reliability by significantly reducing duplicate log entries.