Use the shared inner scrolling layout in the visual briefing

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor

@@ -6,7 +6,10 @@
 
 <CascadingValue Value="Components.VISUAL_BRIEFING_ASSISTANT">
     <CascadingValue Value="@this.CurrentMediaOwner">
-        <div class="visual-briefing-shell">
+        @* The assistant does not inherit AssistantBase, so it sets up the inner scrolling itself, the
+           way the log viewer does. A plain div is enough here: unlike AssistantBase, this assistant
+           deliberately has no area-wide drop zone, because its two zones have to be aimed at. *@
+        <div class="inner-scrolling-context">
             <PreviewPrototype ApplyInnerScrollingFix="true"/>
             <MudStack Row="true" AlignItems="AlignItems.Center" Class="mb-3 mr-3" StretchItems="StretchItems.Start">
                 <MudText Typo="Typo.h3">@T("Visual Briefings")</MudText>
@@ -14,6 +17,7 @@
                 <MudIconButton Variant="Variant.Text" Icon="@Icons.Material.Filled.Settings" OnClick="@this.OpenSettingsDialogAsync"/>
             </MudStack>
 
+            <InnerScrolling>
                 <MudList T="Guid"
                          Color="Color.Primary"
                          Class="mb-1"
@@ -334,6 +338,7 @@
                         }
                     }
                 </main>
+            </InnerScrolling>
         </div>
     </CascadingValue>
 </CascadingValue>

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingAssistant.razor.css

@@ -1,10 +1,3 @@
-.visual-briefing-shell {
-    height: 100%;
-    min-height: 0;
-    overflow-x: hidden;
-    overflow-y: auto;
-}
-
 .visual-briefing-main {
     min-width: 0;
     padding-bottom: 1rem;