feat: preliminary work on assistant

lib/bds/desktop/shell_live.ex

@@ -47,6 +47,8 @@ defmodule BDS.Desktop.ShellLive do
      |> assign(:page_language, ShellData.ui_language())
       |> assign(:client_shortcuts, Commands.client_shortcuts())
      |> assign(:offline_mode, true)
+      |> assign(:assistant_prompt, "")
+      |> assign(:assistant_messages, [])
     |> assign(:is_mac_ui, mac_ui?())
     |> assign(:menu_groups, titlebar_menu_groups())
     |> assign(:titlebar_menu_group, nil)
@@ -275,6 +277,25 @@ defmodule BDS.Desktop.ShellLive do
     {:noreply, reload_shell(socket, socket.assigns.workbench)}
   end
 
+  def handle_event("update_assistant_prompt", %{"assistant" => %{"prompt" => prompt}}, socket) do
+    {:noreply, assign(socket, :assistant_prompt, prompt)}
+  end
+
+  def handle_event("submit_assistant_prompt", %{"assistant" => %{"prompt" => prompt}}, socket) do
+    prompt = prompt |> to_string() |> String.trim()
+
+    socket =
+      if prompt == "" do
+        assign(socket, :assistant_prompt, "")
+      else
+        socket
+        |> assign(:assistant_prompt, "")
+        |> assign(:assistant_messages, socket.assigns.assistant_messages ++ assistant_turn(prompt, socket))
+      end
+
+    {:noreply, socket}
+  end
+
   def handle_event("open_tasks_panel", _params, socket) do
     workbench =
       socket.assigns.workbench
@@ -1506,6 +1527,34 @@ defmodule BDS.Desktop.ShellLive do
   defp tab_icon_id(%{type: :style}), do: "settings"
   defp tab_icon_id(%{type: type}), do: Atom.to_string(type)
 
+  defp assistant_turn(prompt, socket) do
+    [
+      %{role: "user", content: prompt},
+      %{role: "assistant", content: assistant_reply(socket)}
+    ]
+  end
+
+  defp assistant_reply(socket) do
+    if socket.assigns.offline_mode do
+      ShellData.translate("Automatic AI actions stay gated by airplane mode.", %{}, socket.assigns.page_language)
+    else
+      ShellData.translate(
+        "The assistant sidebar chat surface is ready, but model execution is not connected yet.",
+        %{},
+        socket.assigns.page_language
+      )
+    end
+  end
+
+  defp assistant_project_name(nil), do: translated("Projects")
+  defp assistant_project_name(project), do: project.name
+
+  defp assistant_message_label("assistant"), do: translated("Assistant")
+  defp assistant_message_label("user"), do: translated("You")
+  defp assistant_message_label(_role), do: translated("Assistant")
+
+  defp assistant_message_testid(role), do: "assistant-message-#{role}"
+
   defp media_thumbnail_glyph(mime_type) do
     case String.split(to_string(mime_type || ""), "/", parts: 2) do
       ["image", _rest] -> "IMG"

lib/bds/desktop/shell_live/index.html.heex

@@ -416,10 +416,58 @@
     >
       <div class="resizable-panel-divider assistant-divider" data-resize="assistant" data-role="resize-handle"></div>
       <aside class="assistant-sidebar" data-region="assistant-sidebar">
-        <div class="assistant-header">
-          <strong><%= translated("Assistant") %></strong>
-        </div>
         <div class="assistant-content">
+          <header class="assistant-sidebar-header">
+            <div class="assistant-sidebar-heading">
+              <strong><%= translated("AI Assistant") %></strong>
+              <span class="assistant-sidebar-description"><%= translated("AI conversations") %></span>
+            </div>
+            <span class={[
+              "assistant-sidebar-status",
+              if(@offline_mode, do: "is-offline", else: "is-online")
+            ]}>
+              <%= if @offline_mode, do: translated("Offline"), else: translated("Chat") %>
+            </span>
+          </header>
+
+          <section class="assistant-sidebar-context" data-testid="assistant-context">
+            <div class="assistant-sidebar-context-row">
+              <span class="assistant-sidebar-context-label"><%= translated("Project") %></span>
+              <span class="assistant-sidebar-context-value"><%= assistant_project_name(@current_project) %></span>
+            </div>
+            <div class="assistant-sidebar-context-row">
+              <span class="assistant-sidebar-context-label"><%= translated("Editor") %></span>
+              <span class="assistant-sidebar-context-value"><%= tab_title(@current_tab, @tab_meta) %></span>
+            </div>
+            <p class="assistant-sidebar-context-text"><%= tab_subtitle(@current_tab, @tab_meta) %></p>
+          </section>
+
+          <form
+            class="assistant-sidebar-prompt-form"
+            data-testid="assistant-prompt-form"
+            phx-change="update_assistant_prompt"
+            phx-submit="submit_assistant_prompt"
+          >
+            <textarea
+              class="assistant-sidebar-prompt"
+              data-testid="assistant-prompt-input"
+              name="assistant[prompt]"
+              rows="6"
+              placeholder={translated("Ask the assistant about the active project or editor.")}
+            ><%= @assistant_prompt %></textarea>
+
+            <button
+              class="assistant-sidebar-start-button"
+              data-testid="assistant-start-button"
+              type="submit"
+              disabled={String.trim(@assistant_prompt || "") == ""}
+            >
+              <%= translated("Start chat") %>
+            </button>
+          </form>
+
+          <%= if Enum.empty?(@assistant_messages) do %>
+            <div class="assistant-sidebar-welcome">
               <%= for card <- @assistant_cards do %>
                 <section class="assistant-card">
                   <strong><%= translated(card.label) %></strong>
@@ -427,6 +475,20 @@
                 </section>
               <% end %>
             </div>
+          <% else %>
+            <div class="assistant-sidebar-transcript">
+              <%= for message <- @assistant_messages do %>
+                <article
+                  class={["assistant-sidebar-message", message.role]}
+                  data-testid={assistant_message_testid(message.role)}
+                >
+                  <span class="assistant-sidebar-message-role"><%= assistant_message_label(message.role) %></span>
+                  <p class="assistant-sidebar-message-content"><%= message.content %></p>
+                </article>
+              <% end %>
+            </div>
+          <% end %>
+        </div>
       </aside>
     </section>
   </div>

priv/i18n/locales/de.json

@@ -221,5 +221,9 @@
   "View": "Ansicht",
   "Welcome to bDS2": "Willkommen bei bDS2",
   "Workbench Notes": "Workbench-Hinweise",
-  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "Die Integration des Arbeitsverzeichnisses ist in der Shell noch nicht verdrahtet, aber der Tab ist auswählbar und bereit für Befehlsausgaben."
+  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "Die Integration des Arbeitsverzeichnisses ist in der Shell noch nicht verdrahtet, aber der Tab ist auswählbar und bereit für Befehlsausgaben.",
+  "Ask the assistant about the active project or editor.": "Frage den Assistenten zum aktiven Projekt oder Editor.",
+  "Start chat": "Chat starten",
+  "You": "Du",
+  "The assistant sidebar chat surface is ready, but model execution is not connected yet.": "Die Chat-Oberfläche der Assistenten-Seitenleiste ist bereit, aber die Modellausführung ist noch nicht verbunden."
 }

priv/i18n/locales/en.json

@@ -221,5 +221,9 @@
   "View": "View",
   "Welcome to bDS2": "Welcome to bDS2",
   "Workbench Notes": "Workbench Notes",
-  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output."
+  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.",
+  "Ask the assistant about the active project or editor.": "Ask the assistant about the active project or editor.",
+  "Start chat": "Start chat",
+  "You": "You",
+  "The assistant sidebar chat surface is ready, but model execution is not connected yet.": "The assistant sidebar chat surface is ready, but model execution is not connected yet."
 }

priv/i18n/locales/es.json

@@ -221,5 +221,9 @@
   "View": "Ver",
   "Welcome to bDS2": "Bienvenido a bDS2",
   "Workbench Notes": "Notas del área de trabajo",
-  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "La integración del árbol de trabajo aún no está conectada en el shell, pero la pestaña es seleccionable y está lista para la salida de comandos."
+  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "La integración del árbol de trabajo aún no está conectada en el shell, pero la pestaña es seleccionable y está lista para la salida de comandos.",
+  "Ask the assistant about the active project or editor.": "Pregunta al asistente sobre el proyecto o editor activo.",
+  "Start chat": "Iniciar chat",
+  "You": "Tú",
+  "The assistant sidebar chat surface is ready, but model execution is not connected yet.": "La superficie de chat de la barra lateral del asistente está lista, pero la ejecución del modelo aún no está conectada."
 }

priv/i18n/locales/fr.json

@@ -221,5 +221,9 @@
   "View": "Affichage",
   "Welcome to bDS2": "Bienvenue dans bDS2",
   "Workbench Notes": "Notes d’atelier",
-  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "L’intégration de l’arbre de travail n’est pas encore câblée dans le shell, mais l’onglet est sélectionnable et prêt pour la sortie des commandes."
+  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "L’intégration de l’arbre de travail n’est pas encore câblée dans le shell, mais l’onglet est sélectionnable et prêt pour la sortie des commandes.",
+  "Ask the assistant about the active project or editor.": "Interrogez l’assistant sur le projet ou l’éditeur actif.",
+  "Start chat": "Démarrer la conversation",
+  "You": "Vous",
+  "The assistant sidebar chat surface is ready, but model execution is not connected yet.": "La surface de discussion de la barre latérale de l’assistant est prête, mais l’exécution du modèle n’est pas encore connectée."
 }

priv/i18n/locales/it.json

@@ -221,5 +221,9 @@
   "View": "Vista",
   "Welcome to bDS2": "Benvenuto in bDS2",
   "Workbench Notes": "Note del banco di lavoro",
-  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "L’integrazione del working tree non è ancora collegata nella shell, ma la scheda è selezionabile e pronta per l’output dei comandi."
+  "Working tree integration is not wired yet in the shell, but the tab is selectable and ready for command output.": "L’integrazione del working tree non è ancora collegata nella shell, ma la scheda è selezionabile e pronta per l’output dei comandi.",
+  "Ask the assistant about the active project or editor.": "Chiedi all’assistente del progetto o editor attivo.",
+  "Start chat": "Avvia chat",
+  "You": "Tu",
+  "The assistant sidebar chat surface is ready, but model execution is not connected yet.": "La superficie chat della barra laterale assistente è pronta, ma l’esecuzione del modello non è ancora collegata."
 }

priv/ui/app.css

@@ -2010,6 +2010,134 @@ button {
   padding: 14px;
 }
 
+.assistant-sidebar-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.assistant-sidebar-heading {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.assistant-sidebar-description,
+.assistant-sidebar-context-text,
+.assistant-sidebar-message-content {
+  color: var(--vscode-descriptionForeground);
+}
+
+.assistant-sidebar-status {
+  border-radius: 999px;
+  border: 1px solid var(--vscode-panel-border);
+  padding: 2px 8px;
+  font-size: 11px;
+  line-height: 1.4;
+}
+
+.assistant-sidebar-status.is-offline {
+  background: rgba(255, 196, 0, 0.18);
+  border-color: rgba(255, 196, 0, 0.35);
+  color: var(--vscode-editor-foreground);
+}
+
+.assistant-sidebar-context {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  padding: 12px;
+  border: 1px solid var(--vscode-panel-border);
+  border-radius: 10px;
+  background: color-mix(in srgb, var(--vscode-sideBar-background) 78%, var(--vscode-editor-background));
+}
+
+.assistant-sidebar-context-row {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.assistant-sidebar-context-label,
+.assistant-sidebar-message-role {
+  font-size: 11px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--vscode-descriptionForeground);
+}
+
+.assistant-sidebar-context-value {
+  text-align: right;
+  color: var(--vscode-editor-foreground);
+}
+
+.assistant-sidebar-context-text,
+.assistant-sidebar-message-content {
+  margin: 0;
+  white-space: pre-wrap;
+}
+
+.assistant-sidebar-prompt-form,
+.assistant-sidebar-welcome,
+.assistant-sidebar-transcript {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.assistant-sidebar-prompt {
+  width: 100%;
+  min-height: 112px;
+  resize: vertical;
+  border: 1px solid var(--vscode-input-border);
+  border-radius: 10px;
+  background: var(--vscode-input-background);
+  color: var(--vscode-input-foreground);
+  padding: 10px 12px;
+  font: inherit;
+}
+
+.assistant-sidebar-prompt:focus {
+  outline: 1px solid var(--vscode-focusBorder);
+  outline-offset: 1px;
+}
+
+.assistant-sidebar-start-button {
+  align-self: flex-start;
+  border: 1px solid var(--vscode-button-border, transparent);
+  border-radius: 999px;
+  background: var(--vscode-button-background);
+  color: var(--vscode-button-foreground);
+  padding: 7px 14px;
+  cursor: pointer;
+}
+
+.assistant-sidebar-start-button:disabled {
+  cursor: default;
+  opacity: 0.55;
+}
+
+.assistant-card,
+.assistant-sidebar-message {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  padding: 12px;
+  border: 1px solid var(--vscode-panel-border);
+  border-radius: 10px;
+  border-bottom-width: 1px;
+  background: color-mix(in srgb, var(--vscode-sideBar-background) 82%, var(--vscode-editor-background));
+}
+
+.assistant-sidebar-message.user {
+  background: color-mix(in srgb, var(--vscode-list-hoverBackground) 76%, transparent);
+}
+
+.assistant-sidebar-message.assistant {
+  background: color-mix(in srgb, var(--vscode-sideBar-background) 70%, var(--vscode-editor-background));
+}
+
 .status-bar {
   height: 22px;
   display: flex;

test/bds/desktop/shell_live_test.exs

@@ -177,6 +177,32 @@ defmodule BDS.Desktop.ShellLiveTest do
     assert html =~ ">7<"
   end
 
+  test "assistant sidebar exposes context, prompt, and offline-gated transcript" do
+    {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
+
+    html =
+      view
+      |> element("[data-testid='toggle-assistant']")
+      |> render_click()
+
+    assert html =~ ~s(data-testid="assistant-shell")
+    assert html =~ ~s(data-testid="assistant-context")
+    assert html =~ ~s(data-testid="assistant-prompt-form")
+    assert html =~ ~s(data-testid="assistant-prompt-input")
+    assert html =~ ~s(data-testid="assistant-start-button")
+    assert html =~ ~s(>Dashboard<)
+
+    html =
+      render_submit(view, "submit_assistant_prompt", %{
+        "assistant" => %{"prompt" => "Summarize the current project"}
+      })
+
+    assert html =~ ~s(data-testid="assistant-message-user")
+    assert html =~ ~s(data-testid="assistant-message-assistant")
+    assert html =~ "Summarize the current project"
+    assert html =~ "Automatic AI actions stay gated by airplane mode."
+  end
+
   test "sidebar open supports preview and pin intents for entity tabs" do
     {:ok, view, _html} = live_isolated(build_conn(), BDS.Desktop.ShellLive)
 

test/bds/ui/shell_test.exs

@@ -160,4 +160,19 @@ defmodule BDS.UI.ShellTest do
     assert template =~ "tab-actions"
     assert template =~ "tab-dirty-indicator"
   end
+
+  test "desktop shell assets keep the assistant sidebar chat surface contract" do
+    css = File.read!("/Users/gb/Projects/bDS2/priv/ui/app.css")
+    template = File.read!("/Users/gb/Projects/bDS2/lib/bds/desktop/shell_live/index.html.heex")
+
+    assert css =~ ".assistant-sidebar-context"
+    assert css =~ ".assistant-sidebar-prompt"
+    assert css =~ ".assistant-sidebar-start-button"
+    assert css =~ ".assistant-sidebar-message"
+    assert template =~ "data-testid=\"assistant-context\""
+    assert template =~ "data-testid=\"assistant-prompt-form\""
+    assert template =~ "data-testid=\"assistant-prompt-input\""
+    assert template =~ "data-testid=\"assistant-start-button\""
+    assert template =~ "assistant-sidebar-transcript"
+  end
 end