fix: A2UI surfaces

lib/bds/ai.ex

@@ -163,9 +163,15 @@ defmodule BDS.AI do
   @spec get_chat_conversation(String.t()) :: BDS.AI.ChatConversation.t() | nil
   defdelegate get_chat_conversation(conversation_id), to: Chat
 
+  @spec delete_chat_conversation(String.t()) :: {:ok, :deleted} | {:error, :not_found | term()}
+  defdelegate delete_chat_conversation(conversation_id), to: Chat
+
   @spec available_chat_models(String.t() | nil) :: [map()]
   defdelegate available_chat_models(current_model \\ nil), to: Chat
 
+  @spec effective_chat_model(BDS.AI.ChatConversation.t() | map() | nil) :: String.t() | nil
+  defdelegate effective_chat_model(conversation), to: Chat
+
   @spec set_conversation_model(String.t(), String.t()) ::
           {:ok, map()} | {:error, :not_found | Ecto.Changeset.t()}
   defdelegate set_conversation_model(conversation_id, model_id), to: Chat

lib/bds/ai/chat.ex

@@ -23,6 +23,8 @@ defmodule BDS.AI.Chat do
 
   @default_system_prompt "You are the bDS AI backend. Be precise, prefer structured JSON when asked, and avoid inventing blog facts."
   @default_max_output_tokens 16_384
+  @title_max_output_tokens 20
+  @chat_title_max_length 30
   @chat_max_tool_rounds 10
   @default_context_window 128_000
 
@@ -59,6 +61,22 @@ defmodule BDS.AI.Chat do
     Repo.get(ChatConversation, conversation_id)
   end
 
+  @spec delete_chat_conversation(String.t()) :: {:ok, :deleted} | {:error, :not_found | term()}
+  def delete_chat_conversation(conversation_id) when is_binary(conversation_id) do
+    case Repo.get(ChatConversation, conversation_id) do
+      nil ->
+        {:error, :not_found}
+
+      %ChatConversation{} = conversation ->
+        Repo.delete_all(from message in ChatMessage, where: message.conversation_id == ^conversation_id)
+
+        case Repo.delete(conversation) do
+          {:ok, _conversation} -> {:ok, :deleted}
+          {:error, reason} -> {:error, reason}
+        end
+    end
+  end
+
   @spec available_chat_models(String.t() | nil) :: [map()]
   def available_chat_models(current_model \\ nil) do
     endpoint_models = configured_chat_models()
@@ -87,6 +105,15 @@ defmodule BDS.AI.Chat do
     end)
   end
 
+  @spec effective_chat_model(ChatConversation.t() | map() | nil) :: String.t() | nil
+  def effective_chat_model(%ChatConversation{} = conversation) do
+    resolve_effective_chat_model(conversation.model)
+  end
+
+  def effective_chat_model(%{model: model}), do: resolve_effective_chat_model(model)
+  def effective_chat_model(%{"model" => model}), do: resolve_effective_chat_model(model)
+  def effective_chat_model(_conversation), do: resolve_effective_chat_model(nil)
+
   @spec set_conversation_model(String.t(), String.t()) ::
           {:ok, map()} | {:error, :not_found | Ecto.Changeset.t()}
   def set_conversation_model(conversation_id, model_id)
@@ -264,6 +291,25 @@ defmodule BDS.AI.Chat do
     end
   end
 
+  defp resolve_effective_chat_model(model) when is_binary(model) and model != "", do: model
+
+  defp resolve_effective_chat_model(_model) do
+    mode = if AI.airplane_mode?(), do: :airplane, else: :online
+
+    preference_key = if mode == :airplane, do: :airplane_chat, else: :chat
+
+    case Runtime.model_preference_value(preference_key) do
+      model when is_binary(model) and model != "" ->
+        model
+
+      _other ->
+        case AI.get_endpoint(mode) do
+          {:ok, %{model: model}} when is_binary(model) and model != "" -> model
+          _other -> nil
+        end
+    end
+  end
+
   defp catalog_provider_name_map do
     Repo.all(from provider in CatalogProvider, select: {provider.id, provider.name})
     |> Map.new()
@@ -303,7 +349,7 @@ defmodule BDS.AI.Chat do
 
   defp fallback_provider_name(_provider), do: "Other"
 
-  defp do_send_chat_message(conversation, _user_message, opts) do
+  defp do_send_chat_message(conversation, user_message, opts) do
     runtime = Keyword.get(opts, :runtime, OpenAICompatibleRuntime)
     project_id = Keyword.get(opts, :project_id, active_project_id())
 
@@ -327,11 +373,106 @@ defmodule BDS.AI.Chat do
              runtime,
              opts,
              @chat_max_tool_rounds
-           ) do
+           ),
+         {:ok, reply} <- maybe_generate_chat_title(conversation.id, user_message.content, reply, opts) do
       {:ok, reply}
     end
   end
 
+  defp maybe_generate_chat_title(conversation_id, user_content, reply, opts) do
+    conversation = Repo.get!(ChatConversation, conversation_id)
+
+    cond do
+      chat_user_message_count(conversation_id) != 1 ->
+        {:ok, reply}
+
+      not generated_chat_title?(conversation.title, conversation.model) ->
+        {:ok, reply}
+
+      true ->
+        case generate_chat_title(user_content, opts) do
+          {:ok, title} when is_binary(title) and title != "" ->
+            now = Persistence.now_ms()
+
+            conversation
+            |> ChatConversation.changeset(%{title: title, updated_at: now})
+            |> Repo.update()
+            |> case do
+              {:ok, updated_conversation} ->
+                {:ok, %{reply | conversation: format_conversation(updated_conversation)}}
+
+              {:error, _reason} ->
+                {:ok, reply}
+            end
+
+          _other ->
+            {:ok, reply}
+        end
+    end
+  end
+
+  defp generate_chat_title(user_content, opts) when is_binary(user_content) do
+    runtime = Keyword.get(opts, :runtime, OpenAICompatibleRuntime)
+
+    with {:ok, endpoint, model, mode} <- Runtime.resolve_target(:chat_title, opts),
+         :ok <- Runtime.validate_target(:chat_title, model, mode),
+         request <- build_chat_title_request(user_content, model),
+         {:ok, response} <- runtime.generate(Runtime.endpoint_with_model(endpoint, model), request, opts) do
+      {:ok, sanitize_chat_title(Map.get(response, :content))}
+    end
+  end
+
+  defp build_chat_title_request(user_content, model) do
+    %{
+      operation: :chat_title,
+      model: model,
+      max_output_tokens: @title_max_output_tokens,
+      messages: [
+        %{
+          "role" => "system",
+          "content" =>
+            "Generate an ultra-short title (2-3 words, max 25 characters) for this conversation. Focus ONLY on the topic. Ignore any capability disclaimers. Output ONLY the title text."
+        },
+        %{"role" => "user", "content" => "Topic: #{String.slice(user_content, 0, 100)}"}
+      ]
+    }
+  end
+
+  defp sanitize_chat_title(title) when is_binary(title) do
+    title =
+      title
+      |> String.trim()
+      |> String.trim_leading("\"")
+      |> String.trim_leading("'")
+      |> String.trim_trailing("\"")
+      |> String.trim_trailing("'")
+      |> String.trim_trailing(".")
+      |> String.trim_trailing("!")
+      |> String.trim_trailing("?")
+
+    if String.length(title) > @chat_title_max_length do
+      String.slice(title, 0, @chat_title_max_length - 3) <> "..."
+    else
+      title
+    end
+  end
+
+  defp sanitize_chat_title(_title), do: ""
+
+  defp chat_user_message_count(conversation_id) do
+    Repo.aggregate(
+      from(message in ChatMessage,
+        where: message.conversation_id == ^conversation_id and message.role == :user
+      ),
+      :count,
+      :id
+    )
+  end
+
+  defp generated_chat_title?(title, model) do
+    title in [generated_chat_title(nil), generated_chat_title(model)]
+  end
+
   defp chat_round(
          _conversation,
          _messages,

lib/bds/desktop/shell_live.ex

@@ -135,6 +135,7 @@ defmodule BDS.Desktop.ShellLive do
      |> assign(:chat_editor_request_refs, %{})
      |> assign(:chat_editor_surface_data, %{})
      |> assign(:chat_editor_surface_tabs, %{})
+    |> assign(:chat_editor_dismissed_surfaces, MapSet.new())
      |> assign(:chat_editor_action_errors, %{})
      |> assign(:import_editor_analysis_states, %{})
      |> assign(:import_editor_analysis_task_refs, %{})
@@ -457,6 +458,30 @@ defmodule BDS.Desktop.ShellLive do
     end
   end
 
+  def handle_event("delete_sidebar_chat", %{"id" => conversation_id}, socket) do
+    case AI.delete_chat_conversation(conversation_id) do
+      {:ok, :deleted} ->
+        workbench = Workbench.close_tab(socket.assigns.workbench, :chat, conversation_id)
+        tab_meta = Map.delete(socket.assigns.tab_meta, {:chat, conversation_id})
+
+        {:noreply,
+         socket
+         |> assign(:tab_meta, tab_meta)
+         |> reload_shell(workbench)}
+
+      {:error, reason} ->
+        {:noreply,
+         socket
+         |> append_output_entry(
+           translated("sidebar.chat.deleteConversation"),
+           inspect(reason),
+           nil,
+           "error"
+         )
+         |> reload_shell(socket.assigns.workbench)}
+    end
+  end
+
   def handle_event("toggle_offline_mode", _params, socket) do
     next_mode = not socket.assigns.offline_mode
 
@@ -948,6 +973,10 @@ defmodule BDS.Desktop.ShellLive do
      ChatEditor.select_surface_tab(socket, surface_id, parse_integer(index), &reload_shell/2)}
   end
 
+  def handle_event("dismiss_chat_surface", %{"surface-id" => surface_id}, socket) do
+    {:noreply, ChatEditor.dismiss_surface(socket, surface_id, &reload_shell/2)}
+  end
+
   def handle_event("chat_surface_action", params, socket) do
     {:noreply,
      ChatSurface.handle_action(socket, params, %{

lib/bds/desktop/shell_live/chat_editor.ex

@@ -59,6 +59,16 @@ defmodule BDS.Desktop.ShellLive.ChatEditor do
     |> reload.(socket.assigns.workbench)
   end
 
+  @spec dismiss_surface(term(), term(), term()) :: term()
+  def dismiss_surface(socket, surface_id, reload) when is_binary(surface_id) do
+    socket
+    |> assign(
+      :chat_editor_dismissed_surfaces,
+      MapSet.put(socket.assigns.chat_editor_dismissed_surfaces, surface_id)
+    )
+    |> reload.(socket.assigns.workbench)
+  end
+
   @spec current_surface_data(term(), term()) :: term()
   def current_surface_data(socket, surface_id) when is_binary(surface_id) do
     Map.get(socket.assigns.chat_editor_surface_data, surface_id, %{})
@@ -314,13 +324,23 @@ defmodule BDS.Desktop.ShellLive.ChatEditor do
     <%= if @markers != [] do %>
       <div class="chat-tool-markers">
         <%= for marker <- @markers do %>
-          <div class={["chat-tool-marker", if(marker.complete?, do: "completed", else: "pending")]} data-testid="chat-tool-marker">
+          <details class={["chat-tool-marker", if(marker.complete?, do: "completed", else: "pending")]} data-testid="chat-tool-marker">
+            <summary>
               <span class="chat-tool-marker-icon"><%= if marker.complete?, do: "✓", else: "●" %></span>
               <span class="chat-tool-marker-name"><%= marker.name %></span>
               <%= if marker.args_preview not in [nil, ""] do %>
                 <span class="chat-tool-marker-args">(<%= marker.args_preview %>)</span>
               <% end %>
+            </summary>
+            <div class="chat-tool-marker-details" data-testid="chat-tool-marker-details">
+              <div class="chat-tool-marker-detail-label"><%= translated("chat.toolArguments") %></div>
+              <pre><%= Jason.encode!(marker.arguments || %{}, pretty: true) %></pre>
+              <%= if marker.result not in [nil, ""] do %>
+                <div class="chat-tool-marker-detail-label"><%= translated("chat.toolResult") %></div>
+                <pre><%= marker.result %></pre>
+              <% end %>
             </div>
+          </details>
         <% end %>
       </div>
     <% end %>
@@ -332,7 +352,13 @@ defmodule BDS.Desktop.ShellLive.ChatEditor do
   @spec chat_surface(term()) :: term()
   def chat_surface(assigns) do
     ~H"""
-    <article class={["chat-inline-surface", "chat-inline-surface-#{@surface.type}"]} data-testid="chat-inline-surface">
+    <details id={@surface.id} class={["chat-inline-surface", "chat-inline-surface-#{@surface.type}"]} data-testid="chat-inline-surface" data-expanded={Map.get(@surface, :expanded?, false)} open={Map.get(@surface, :expanded?, false)}>
+      <summary class="chat-inline-surface-header">
+        <span class="chat-inline-surface-icon"><%= surface_icon(@surface.type) %></span>
+        <span class="chat-inline-surface-title"><%= surface_title(@surface) %></span>
+        <button class="chat-inline-surface-dismiss" type="button" phx-click="dismiss_chat_surface" phx-value-surface-id={@surface.id} aria-label={translated("chat.dismissSurface")} data-testid="chat-inline-surface-dismiss">×</button>
+      </summary>
+      <div class="chat-inline-surface-body">
       <%= case @surface.type do %>
         <% "card" -> %>
           <div class="chat-surface-card">
@@ -526,10 +552,28 @@ defmodule BDS.Desktop.ShellLive.ChatEditor do
         <% _other -> %>
           <pre class="chat-tool-surface-json"><%= Jason.encode!(@surface.raw || %{}, pretty: true) %></pre>
       <% end %>
-    </article>
+      </div>
+    </details>
     """
   end
 
+  defp surface_icon("chart"), do: "▥"
+  defp surface_icon("table"), do: "▦"
+  defp surface_icon("form"), do: "▤"
+  defp surface_icon("card"), do: "▣"
+  defp surface_icon("metric"), do: "#"
+  defp surface_icon("list"), do: "☰"
+  defp surface_icon("tabs"), do: "▧"
+  defp surface_icon(_type), do: "■"
+
+  defp surface_title(surface) do
+    cond do
+      present?(Map.get(surface, :title)) -> Map.get(surface, :title)
+      present?(Map.get(surface, :label)) -> Map.get(surface, :label)
+      true -> surface.type |> to_string() |> String.capitalize()
+    end
+  end
+
   # ── Private helpers ───────────────────────────────────────────────────────
 
   defp update_request(socket, conversation_id, updater, reload) do

lib/bds/desktop/shell_live/chat_editor/message_build.ex

@@ -15,12 +15,14 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
       %ChatConversation{} = conversation ->
         messages = AI.list_chat_messages(conversation.id)
         request = Map.get(assigns.chat_editor_requests, conversation.id)
-        available_models = AI.available_chat_models(conversation.model)
+        effective_model = AI.effective_chat_model(conversation)
+        available_models = AI.available_chat_models(effective_model)
 
         %{
           id: conversation.id,
           title: conversation.title || translated("chat.newChat"),
           model: conversation.model,
+          effective_model: effective_model,
           available_models: available_models,
           available_model_groups: ModelSelection.group_available_models(available_models),
           model_selector_open?:
@@ -31,6 +33,7 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
           is_streaming: not is_nil(request),
           streaming_content: streaming_content(request),
           streaming_tool_markers: ToolTracking.tool_markers_from_events(request),
+          streaming_inline_surfaces: streaming_inline_surfaces(conversation.id, request, assigns),
           offline?: Map.get(assigns, :offline_mode, true),
           needs_api_key?: ModelSelection.needs_api_key?(Map.get(assigns, :offline_mode, true)),
           action_error: Map.get(assigns.chat_editor_action_errors, conversation.id),
@@ -49,7 +52,7 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
         case message.role do
           :tool ->
             if current_entry && current_entry.role == :assistant do
-              {entries, append_tool_surface(current_entry, message), turn_index}
+              {entries, append_tool_result(current_entry, message), turn_index}
             else
               {entries, current_entry, turn_index}
             end
@@ -95,18 +98,15 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
       content: message.content || "",
       turn_index: turn_index,
       tool_markers: tool_markers,
-      inline_surfaces: ToolSurfaces.build_render_surfaces(tool_markers, message.id, assigns),
+      inline_surfaces:
+        ToolSurfaces.build_render_surfaces(tool_markers, message.id, assigns)
+        |> mark_surfaces_expanded(assigns),
       tool_surfaces: []
     }
   end
 
-  defp append_tool_surface(entry, message) do
-    entry = ToolTracking.mark_tool_call_completed(entry, message.tool_call_id)
-
-    case ToolSurfaces.normalize_tool_surface(message.content) do
-      nil -> entry
-      surface -> update_in(entry.tool_surfaces, &(&1 ++ [surface]))
-    end
+  defp append_tool_result(entry, message) do
+    ToolTracking.mark_tool_call_completed(entry, message.tool_call_id, message.content)
   end
 
   defp tool_only_assistant_entry?(%{role: :assistant, content: content} = entry) do
@@ -125,6 +125,16 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
     }
   end
 
+  defp mark_surfaces_expanded([], _assigns), do: []
+
+  defp mark_surfaces_expanded(surfaces, assigns) do
+    dismissed = Map.get(assigns, :chat_editor_dismissed_surfaces, MapSet.new())
+
+    surfaces
+    |> Enum.reject(&MapSet.member?(dismissed, &1.id))
+    |> Enum.map(&Map.put(&1, :expanded?, true))
+  end
+
   defp pending_user_message(_messages, nil), do: nil
 
   defp pending_user_message(messages, %{message: message}) when is_binary(message) do
@@ -140,6 +150,15 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.MessageBuild do
   defp streaming_content(%{content: content}) when is_binary(content), do: content
   defp streaming_content(_request), do: ""
 
+  defp streaming_inline_surfaces(_conversation_id, nil, _assigns), do: []
+
+  defp streaming_inline_surfaces(conversation_id, request, assigns) do
+    request
+    |> ToolTracking.tool_markers_from_events()
+    |> ToolSurfaces.build_render_surfaces("streaming-#{conversation_id}", assigns)
+    |> mark_surfaces_expanded(assigns)
+  end
+
   defp translated(text, bindings \\ %{}),
     do: ShellData.translate(text, bindings, BDS.Desktop.UILocale.current())
 end

lib/bds/desktop/shell_live/chat_editor/tool_tracking.ex

@@ -22,6 +22,7 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.ToolTracking do
         name: tool_call_name(tool_call),
         arguments: arguments,
         args_preview: tool_arguments_preview(arguments),
+        result: nil,
         complete?: false
       }
     end)
@@ -39,11 +40,19 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.ToolTracking do
   @spec tool_arguments_preview(term()) :: term()
   def tool_arguments_preview(_arguments), do: ""
 
+  @spec mark_tool_call_completed(term(), term()) :: term()
   def mark_tool_call_completed(entry, tool_call_id) when is_binary(tool_call_id) do
+    mark_tool_call_completed(entry, tool_call_id, nil)
+  end
+
+  def mark_tool_call_completed(entry, _tool_call_id), do: entry
+
+  @spec mark_tool_call_completed(term(), term(), term()) :: term()
+  def mark_tool_call_completed(entry, tool_call_id, result) when is_binary(tool_call_id) do
     update_in(entry.tool_markers, fn markers ->
       Enum.map(markers, fn marker ->
         if marker.id == tool_call_id do
-          %{marker | complete?: true}
+          %{marker | complete?: true, result: result}
         else
           marker
         end
@@ -51,8 +60,7 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.ToolTracking do
     end)
   end
 
-  @spec mark_tool_call_completed(term(), term()) :: term()
-  def mark_tool_call_completed(entry, _tool_call_id), do: entry
+  def mark_tool_call_completed(entry, _tool_call_id, _result), do: entry
 
   @spec tool_markers_from_events(term()) :: term()
   def tool_markers_from_events(nil), do: []
@@ -68,6 +76,7 @@ defmodule BDS.Desktop.ShellLive.ChatEditor.ToolTracking do
                 name: event.name,
                 arguments: event.arguments,
                 args_preview: tool_arguments_preview(event.arguments || %{}),
+                result: nil,
                 complete?: false
               }
             ]

lib/bds/desktop/shell_live/chat_editor_html/chat_editor.html.heex

@@ -17,7 +17,7 @@
             phx-click="toggle_chat_model_selector"
             data-testid="chat-model-selector-button"
           >
-            <span><%= @chat_editor.model || translated("chat.newChat") %></span>
+            <span><%= @chat_editor.effective_model || translated("chat.modelUnavailable") %></span>
             <span class="chat-model-selector-caret">▾</span>
           </button>
 
@@ -33,7 +33,7 @@
                     <button
                       class={[
                         "chat-model-selector-option",
-                        if(model.id == @chat_editor.model, do: "active")
+                        if(model.id == @chat_editor.effective_model, do: "active")
                       ]}
                       type="button"
                       phx-click="select_chat_model"
@@ -109,40 +109,6 @@
           <.chat_surface surface={surface} />
         <% end %>
 
-        <%= for surface <- message.tool_surfaces do %>
-          <article class="chat-tool-surface" data-testid="chat-tool-surface">
-            <%= if surface.title do %>
-              <h3><%= surface.title %></h3>
-            <% end %>
-
-            <%= case tool_surface_type(surface) do %>
-              <% "table" -> %>
-                <div class="chat-tool-surface-table-wrap">
-                  <table class="chat-tool-surface-table">
-                    <thead>
-                      <tr>
-                        <%= for column <- surface.columns do %>
-                          <th><%= column %></th>
-                        <% end %>
-                      </tr>
-                    </thead>
-                    <tbody>
-                      <%= for row <- surface.rows do %>
-                        <tr>
-                          <%= for value <- row do %>
-                            <td><%= value %></td>
-                          <% end %>
-                        </tr>
-                      <% end %>
-                    </tbody>
-                  </table>
-                </div>
-
-              <% _other -> %>
-                <pre class="chat-tool-surface-json"><%= Jason.encode!(surface.data, pretty: true) %></pre>
-            <% end %>
-          </article>
-        <% end %>
       <% end %>
 
       <%= if @chat_editor.is_streaming and (@chat_editor.streaming_content != "" or @chat_editor.streaming_tool_markers != []) do %>
@@ -160,6 +126,10 @@
             <% end %>
           </div>
         </div>
+
+        <%= for surface <- @chat_editor.streaming_inline_surfaces do %>
+          <.chat_surface surface={surface} />
+        <% end %>
       <% end %>
 
       <%= if @chat_editor.is_streaming and @chat_editor.streaming_content == "" and @chat_editor.streaming_tool_markers == [] do %>

lib/bds/desktop/shell_live/sidebar_components.ex

@@ -353,7 +353,7 @@ defmodule BDS.Desktop.ShellLive.SidebarComponents do
     <%= if Enum.any?(Map.get(@sidebar_data, :items, [])) do %>
       <div class={if(template_sidebar?(@sidebar_data), do: "chat-list-items", else: "settings-nav-list")}>
         <%= for item <- Map.get(@sidebar_data, :items, []) do %>
-          <%= if item.route == "templates" do %>
+          <%= if item.route in ["templates", "chat"] do %>
             <div
               class={["chat-list-item", if(sidebar_item_selected?(@workbench, item.route, item.id), do: "active")]}
               data-item-id={item.id}
@@ -379,11 +379,11 @@ defmodule BDS.Desktop.ShellLive.SidebarComponents do
               </button>
               <button
                 class="chat-item-delete"
-                data-testid="sidebar-delete-template"
+                data-testid={if(item.route == "chat", do: "sidebar-delete-chat", else: "sidebar-delete-template")}
                 data-item-id={item.id}
                 type="button"
-                title={translated("Delete") <> " " <> translated("Template")}
-                phx-click="delete_sidebar_template"
+                title={if(item.route == "chat", do: translated("sidebar.chat.deleteConversation"), else: translated("Delete") <> " " <> translated("Template"))}
+                phx-click={if(item.route == "chat", do: "delete_sidebar_chat", else: "delete_sidebar_template")}
                 phx-value-id={item.id}
               >
                 ×

priv/i18n/locales/de.json

@@ -107,8 +107,12 @@
   "chat.welcomeTipTabs": "Beitragsstatistiken pro Jahr in Tabs mit Diagrammen",
   "chat.role.you": "Du",
   "chat.role.assistant": "Assistent",
+  "chat.modelUnavailable": "Kein Modell",
   "chat.inputPlaceholder": "Nachricht eingeben...",
   "chat.stop": "Stopp",
+  "chat.toolArguments": "Argumente",
+  "chat.toolResult": "Ergebnis",
+  "chat.dismissSurface": "Ansicht schließen",
   "chat.cancelledSuffix": "(abgebrochen)",
   "gitDiff.changedFiles": "Geänderte Dateien",
   "sidebar.tags": "Schlagwörter",
@@ -118,6 +122,7 @@
   "sidebar.noPostsYet": "Noch keine Beiträge",
   "sidebar.noPagesYet": "Noch keine Seiten",
   "sidebar.noMediaYet": "Noch keine Medien",
+  "sidebar.chat.deleteConversation": "Unterhaltung löschen",
   "sidebar.search": "Suchen",
   "sidebar.searchPostsPlaceholder": "Beiträge durchsuchen...",
   "sidebar.searchPagesPlaceholder": "Seiten durchsuchen...",

priv/i18n/locales/en.json

@@ -107,8 +107,12 @@
   "chat.welcomeTipTabs": "Show post statistics by year in tabs with charts",
   "chat.role.you": "You",
   "chat.role.assistant": "Assistant",
+  "chat.modelUnavailable": "No model",
   "chat.inputPlaceholder": "Type a message...",
   "chat.stop": "Stop",
+  "chat.toolArguments": "Arguments",
+  "chat.toolResult": "Result",
+  "chat.dismissSurface": "Dismiss surface",
   "chat.cancelledSuffix": "(cancelled)",
   "gitDiff.changedFiles": "Changed files",
   "sidebar.tags": "Tags",
@@ -118,6 +122,7 @@
   "sidebar.noPostsYet": "No posts yet",
   "sidebar.noPagesYet": "No pages yet",
   "sidebar.noMediaYet": "No media yet",
+  "sidebar.chat.deleteConversation": "Delete conversation",
   "sidebar.search": "Search",
   "sidebar.searchPostsPlaceholder": "Search posts...",
   "sidebar.searchPagesPlaceholder": "Search pages...",

priv/i18n/locales/es.json

@@ -107,8 +107,12 @@
   "chat.welcomeTipTabs": "Muestre estadísticas por año en pestañas con gráficos",
   "chat.role.you": "Tú",
   "chat.role.assistant": "Asistente",
+  "chat.modelUnavailable": "Sin modelo",
   "chat.inputPlaceholder": "Escribe un mensaje...",
   "chat.stop": "Detener",
+  "chat.toolArguments": "Argumentos",
+  "chat.toolResult": "Resultado",
+  "chat.dismissSurface": "Cerrar superficie",
   "chat.cancelledSuffix": "(cancelado)",
   "gitDiff.changedFiles": "Archivos modificados",
   "sidebar.tags": "Etiquetas",
@@ -118,6 +122,7 @@
   "sidebar.noPostsYet": "Aún no hay entradas",
   "sidebar.noPagesYet": "Aún no hay páginas",
   "sidebar.noMediaYet": "Aún no hay medios",
+  "sidebar.chat.deleteConversation": "Eliminar conversación",
   "sidebar.search": "Buscar",
   "sidebar.searchPostsPlaceholder": "Buscar entradas...",
   "sidebar.searchPagesPlaceholder": "Buscar páginas...",

priv/i18n/locales/fr.json

@@ -107,8 +107,12 @@
   "chat.welcomeTipTabs": "Afficher les statistiques par année dans des onglets avec graphiques",
   "chat.role.you": "Vous",
   "chat.role.assistant": "Assistant IA",
+  "chat.modelUnavailable": "Aucun modèle",
   "chat.inputPlaceholder": "Saisissez un message...",
     "chat.stop": "Arrêter",
+    "chat.toolArguments": "Arguments",
+    "chat.toolResult": "Résultat",
+    "chat.dismissSurface": "Fermer la surface",
     "chat.cancelledSuffix": "(annulé)",
   "gitDiff.changedFiles": "Fichiers modifiés",
   "sidebar.tags": "Étiquettes",
@@ -118,6 +122,7 @@
   "sidebar.noPostsYet": "Aucun article pour le moment",
   "sidebar.noPagesYet": "Aucune page pour le moment",
   "sidebar.noMediaYet": "Aucun média pour le moment",
+  "sidebar.chat.deleteConversation": "Supprimer la conversation",
   "sidebar.search": "Rechercher",
   "sidebar.searchPostsPlaceholder": "Rechercher des articles...",
   "sidebar.searchPagesPlaceholder": "Rechercher des pages...",

priv/i18n/locales/it.json

@@ -107,8 +107,12 @@
   "chat.welcomeTipTabs": "Mostrare statistiche per anno in schede con grafici",
   "chat.role.you": "Tu",
   "chat.role.assistant": "Assistente",
+  "chat.modelUnavailable": "Nessun modello",
   "chat.inputPlaceholder": "Scrivi un messaggio...",
   "chat.stop": "Ferma",
+  "chat.toolArguments": "Argomenti",
+  "chat.toolResult": "Risultato",
+  "chat.dismissSurface": "Chiudi superficie",
   "chat.cancelledSuffix": "(annullato)",
   "gitDiff.changedFiles": "File modificati",
   "sidebar.tags": "Tag",
@@ -118,6 +122,7 @@
   "sidebar.noPostsYet": "Nessun post",
   "sidebar.noPagesYet": "Nessuna pagina",
   "sidebar.noMediaYet": "Nessun media",
+  "sidebar.chat.deleteConversation": "Elimina conversazione",
   "sidebar.search": "Cerca",
   "sidebar.searchPostsPlaceholder": "Cerca post...",
   "sidebar.searchPagesPlaceholder": "Cerca pagine...",

priv/ui/app.css

@@ -3565,7 +3565,7 @@ button svg * {
   display: flex;
   align-items: center;
   gap: 10px;
-  overflow: hidden;
+  overflow: visible;
   font-size: 14px;
   font-weight: 500;
   color: var(--vscode-foreground, inherit);
@@ -5145,7 +5145,7 @@ button svg * {
   display: flex;
   align-items: center;
   gap: 10px;
-  overflow: hidden;
+  overflow: visible;
   font-size: 14px;
   font-weight: 500;
   color: var(--vscode-foreground, inherit);
@@ -5558,13 +5558,45 @@ button svg * {
 }
 
 .chat-tool-marker {
+  font-size: 12px;
+  color: var(--vscode-descriptionForeground, inherit);
+}
+
+.chat-tool-marker summary {
   display: flex;
   align-items: center;
   gap: 6px;
-  font-size: 12px;
+  cursor: pointer;
+  list-style: none;
+}
+
+.chat-tool-marker summary::-webkit-details-marker {
+  display: none;
+}
+
+.chat-tool-marker-details {
+  margin: 6px 0 2px 20px;
+  padding: 8px;
+  border: 1px solid var(--vscode-editorGroup-border, var(--line, #3c3c3c));
+  border-radius: 6px;
+  background-color: var(--vscode-editor-background, rgba(0, 0, 0, 0.18));
+}
+
+.chat-tool-marker-detail-label {
+  margin: 0 0 4px;
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
   color: var(--vscode-descriptionForeground, inherit);
 }
 
+.chat-tool-marker-details pre {
+  margin: 0 0 8px;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+  font: 11px/1.45 "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
+}
+
 .chat-tool-marker.completed .chat-tool-marker-icon {
   color: var(--vscode-testing-iconPassed, #89d185);
 }
@@ -5581,13 +5613,60 @@ button svg * {
 .chat-tool-surface {
   width: min(720px, calc(100% - 44px));
   margin-left: 44px;
-  padding: 14px;
   box-sizing: border-box;
   border: 1px solid var(--vscode-editorGroup-border, var(--line, #3c3c3c));
   border-radius: 12px;
   background-color: var(--vscode-sideBar-background, var(--panel-2, #252526));
 }
 
+.chat-inline-surface {
+  overflow: hidden;
+}
+
+.chat-inline-surface-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 12px;
+  cursor: pointer;
+  list-style: none;
+  background-color: var(--vscode-textBlockQuote-background, rgba(127, 127, 127, 0.1));
+}
+
+.chat-inline-surface-header::-webkit-details-marker {
+  display: none;
+}
+
+.chat-inline-surface-title {
+  min-width: 0;
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.chat-inline-surface-dismiss {
+  border: 0;
+  border-radius: 4px;
+  padding: 2px 7px;
+  background: transparent;
+  color: var(--vscode-descriptionForeground, inherit);
+  cursor: pointer;
+  font-size: 15px;
+  line-height: 1.2;
+}
+
+.chat-inline-surface-dismiss:hover {
+  background-color: var(--vscode-toolbar-hoverBackground, rgba(255, 255, 255, 0.08));
+  color: var(--vscode-foreground, inherit);
+}
+
+.chat-inline-surface-body {
+  padding: 14px;
+}
+
 .chat-inline-surface h3,
 .chat-tool-surface h3 {
   margin: 0 0 12px;

priv/ui/live.js

@@ -780,6 +780,14 @@ document.addEventListener("DOMContentLoaded", () => {
           }
         };
 
+        this.syncExpandedSurfaces = () => {
+          this.el
+            .querySelectorAll(".chat-inline-surface[data-expanded='true']")
+            .forEach((surface) => {
+              surface.open = true;
+            });
+        };
+
         this.handleScroll = () => {
           if (!this.scrollContainer) {
             this.stickToBottom = true;
@@ -823,12 +831,14 @@ document.addEventListener("DOMContentLoaded", () => {
         this.el.addEventListener("keydown", this.handleKeyDown);
 
         this.syncScrollContainer();
+        this.syncExpandedSurfaces();
         this.autoResize();
         window.requestAnimationFrame(() => this.scrollToBottom(true));
       },
 
       updated() {
         this.syncScrollContainer();
+        this.syncExpandedSurfaces();
         this.autoResize();
         window.requestAnimationFrame(() => this.scrollToBottom());
       },

test/bds/ai_test.exs

@@ -168,6 +168,9 @@ defmodule BDS.AITest do
                usage: usage(31, 8, 0, 0)
              }}
           end
+
+        :chat_title ->
+          {:ok, %{content: "Blog Stats", usage: usage(12, 3, 0, 0)}}
       end
     end
 
@@ -615,6 +618,46 @@ defmodule BDS.AITest do
            end)
   end
 
+  test "chat generates a short title after the first user turn using the title model" do
+    {:ok, project} = create_project_fixture("Title Chat")
+    _fixtures = seed_project_content(project.id)
+
+    assert {:ok, _endpoint} =
+             BDS.AI.put_endpoint(
+               :online,
+               %{
+                 url: "https://api.example.test/v1",
+                 api_key: "online-secret",
+                 model: "gpt-4o-mini"
+               },
+               secret_backend: FakeSecretBackend
+             )
+
+    assert :ok = BDS.AI.set_airplane_mode(false)
+    assert :ok = BDS.AI.put_model_preference(:title, "title-model")
+    assert {:ok, conversation} = BDS.AI.start_chat(%{model: "gpt-4o-mini"})
+
+    assert {:ok, reply} =
+             BDS.AI.send_chat_message(conversation.id, "How many items are in the blog?",
+               runtime: FakeRuntime,
+               test_pid: self(),
+               project_id: project.id,
+               secret_backend: FakeSecretBackend
+             )
+
+    assert reply.conversation.title == "Blog Stats"
+    assert BDS.AI.get_chat_conversation(conversation.id).title == "Blog Stats"
+
+    assert_received {:runtime_request, _endpoint, %{operation: :chat}}
+    assert_received {:runtime_request, _endpoint, %{operation: :chat}}
+
+    assert_received {:runtime_request, _endpoint, title_request}
+    assert title_request.operation == :chat_title
+    assert title_request.model == "title-model"
+    assert Enum.any?(title_request.messages, &(&1["content"] =~ "2-3 words"))
+    assert Enum.any?(title_request.messages, &(&1["content"] =~ "How many items"))
+  end
+
   test "chat does not prompt models to emit textual tool calls when tools are unavailable" do
     {:ok, project} = create_project_fixture("No Tool Chat")
     _fixtures = seed_project_content(project.id)

test/bds/desktop/shell_live_test.exs

@@ -248,6 +248,17 @@ defmodule BDS.Desktop.ShellLiveTest do
     assert html =~ ~s(data-tab-type="chat")
     assert html =~ ~s(data-tab-id="#{created_chat.id}")
 
+    html = render_click(view, "select_view", %{"view" => "chat"})
+    assert html =~ ~s(data-testid="sidebar-delete-chat")
+
+    html =
+      view
+      |> element("[data-testid='sidebar-delete-chat'][data-item-id='#{created_chat.id}']")
+      |> render_click()
+
+    refute Repo.get(BDS.AI.ChatConversation, created_chat.id)
+    refute html =~ ~s(data-tab-id="#{created_chat.id}")
+
     _html = render_click(view, "select_view", %{"view" => "import"})
 
     html =
@@ -2149,7 +2160,50 @@ defmodule BDS.Desktop.ShellLiveTest do
     assert css =~ "position: static;"
   end
 
-  test "chat editor renders legacy model controls, tool markers, and structured tool surfaces" do
+  test "chat editor model selector uses effective model for new chats and persists selection" do
+    assert :ok = AI.set_airplane_mode(true)
+
+    assert {:ok, _endpoint} =
+             AI.put_endpoint(:airplane, %{
+               url: "http://localhost:11434/v1",
+               api_key: nil,
+               model: "llama-default"
+             })
+
+    assert :ok = AI.put_model_preference(:airplane_chat, "llama-current")
+    assert {:ok, conversation} = AI.start_chat(%{title: "New Chat"})
+
+    {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
+
+    html =
+      render_click(view, "pin_sidebar_item", %{
+        "route" => "chat",
+        "id" => conversation.id,
+        "title" => conversation.title,
+        "subtitle" => "chat"
+      })
+
+    assert html =~ ~s(data-testid="chat-model-selector-button")
+    assert html =~ "llama-current"
+    refute html =~ ~s(<span>New Chat</span><span class="chat-model-selector-caret">▾</span>)
+
+    selector_html = render_click(view, "toggle_chat_model_selector", %{})
+    assert selector_html =~ ~s(class="chat-model-selector-menu")
+    assert selector_html =~ ~s(data-testid="chat-model-selector-option")
+    assert selector_html =~ "llama-current"
+
+    css = File.read!(Path.expand("../../../priv/ui/app.css", __DIR__))
+    assert css =~ ".chat-panel-title {"
+    assert css =~ "overflow: visible;"
+    refute css =~ ".chat-panel-title {\n  flex: 1;\n  min-width: 0;\n  display: flex;\n  align-items: center;\n  gap: 10px;\n  overflow: hidden;"
+
+    render_click(view, "select_chat_model", %{"model" => "llama-next"})
+
+    assert AI.get_chat_conversation(conversation.id).model == "llama-next"
+    assert render(view) =~ "llama-next"
+  end
+
+  test "chat editor renders legacy model controls, collapsed tool pills, and dismissible A2UI surfaces" do
     assert {:ok, conversation} = AI.start_chat(%{title: "Editor Chat", model: "gpt-4.1"})
 
     now = Persistence.now_ms()
@@ -2209,11 +2263,92 @@ defmodule BDS.Desktop.ShellLiveTest do
     assert html =~ ~s(data-testid="chat-model-selector-button")
     assert html =~ "gpt-4.1"
     assert html =~ ~s(data-testid="chat-tool-marker")
+    assert html =~ ~s(data-testid="chat-tool-marker-details")
     assert html =~ "render_table"
-    assert html =~ ~s(data-testid="chat-tool-surface")
+    refute html =~ ~s(data-testid="chat-tool-surface")
+    assert html =~ ~s(data-testid="chat-inline-surface")
+    assert html =~ ~s(data-testid="chat-inline-surface-dismiss")
     assert html =~ "Blog Stats"
     assert html =~ "Metric"
     assert html =~ "Posts"
+
+    dismissed_html =
+      render_click(view, "dismiss_chat_surface", %{
+        "surface-id" => Regex.run(~r/id="([^"]+-surface-0)"/, html) |> Enum.at(1)
+      })
+
+    refute dismissed_html =~ ~s(data-testid="chat-inline-surface")
+  end
+
+  test "chat editor keeps every non-dismissed A2UI surface expanded" do
+    assert {:ok, conversation} = AI.start_chat(%{title: "Surface Chat", model: "gpt-4.1"})
+
+    now = Persistence.now_ms()
+
+    Repo.insert!(
+      BDS.AI.ChatMessage.changeset(%BDS.AI.ChatMessage{}, %{
+        conversation_id: conversation.id,
+        role: :user,
+        content: "Show two updates",
+        created_at: now
+      })
+    )
+
+    Repo.insert!(
+      BDS.AI.ChatMessage.changeset(%BDS.AI.ChatMessage{}, %{
+        conversation_id: conversation.id,
+        role: :assistant,
+        content: "Here are the updates.",
+        tool_calls:
+          Jason.encode!([
+            %{
+              "id" => "call-card-old",
+              "name" => "render_card",
+              "arguments" => %{
+                "title" => "Earlier Missing Data",
+                "body" => "The first data request needs review."
+              }
+            },
+            %{
+              "id" => "call-card-new",
+              "name" => "render_card",
+              "arguments" => %{
+                "title" => "Latest Missing Data",
+                "body" => "The second data request needs review."
+              }
+            }
+          ]),
+        created_at: now + 1
+      })
+    )
+
+    {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
+
+    html =
+      render_click(view, "pin_sidebar_item", %{
+        "route" => "chat",
+        "id" => conversation.id,
+        "title" => conversation.title,
+        "subtitle" => conversation.model || "chat"
+      })
+
+    assert length(:binary.matches(html, ~s(data-testid="chat-inline-surface"))) == 2
+    assert length(:binary.matches(html, "data-expanded")) == 2
+    assert html =~ "Earlier Missing Data"
+    assert html =~ "The first data request needs review."
+    assert html =~ "Latest Missing Data"
+    assert html =~ "The second data request needs review."
+  end
+
+  test "chat editor hook reopens server-expanded A2UI surfaces after patches" do
+    live_js = File.read!(Path.expand("../../../priv/ui/live.js", __DIR__))
+    chat_editor = File.read!(Path.expand("../../../lib/bds/desktop/shell_live/chat_editor.ex", __DIR__))
+
+    assert chat_editor =~ "data-expanded={Map.get(@surface, :expanded?, false)}"
+    assert live_js =~ "this.syncExpandedSurfaces = () =>"
+    assert live_js =~ "querySelectorAll(\".chat-inline-surface[data-expanded='true']\")"
+    assert live_js =~ "surface.open = true;"
+    assert live_js =~ "this.syncExpandedSurfaces();"
   end
 
   test "chat editor folds tool-only assistant steps into the final assistant answer" do
@@ -2647,6 +2782,25 @@ defmodule BDS.Desktop.ShellLiveTest do
     assert assistant_index < user_index
     assert html =~ ~r/<textarea[^>]*class="chat-input chat-surface-input"[^>]*disabled/
 
+    send(view.pid, {
+      :chat_tool_call,
+      conversation.id,
+      %{
+        id: "call-streaming-chart",
+        name: "render_chart",
+        arguments: %{
+          "title" => "Streaming Chart",
+          "chartType" => "bar",
+          "series" => [%{"label" => "Posts", "value" => 3}]
+        }
+      }
+    })
+
+    html = render(view)
+    assert html =~ ~s(data-testid="chat-streaming-message")
+    assert html =~ ~s(data-testid="chat-inline-surface")
+    assert html =~ "Streaming Chart"
+
     html =
       view
       |> element("[data-testid='chat-abort-button']")