Add workspaces, conversation sessions, app-managed computers and pictures

- Rail: Add icon with stacked form modals (bot, workspace, computer),
  coordinator, recent bots with "See all bots", Workspaces section, and
  a workspace mode listing only its crew
- Workspaces: page for context, bots (per-workspace instructions and
  memory), computers (default, link, unlink), models and delete;
  conversations scoped per bot per workspace
- Sessions: conversations split into searchable, reopenable sessions
  with carry-over summaries; sessions and new-session header icons
- Computers: created and provisioned over the docker socket, home dir
  kept at DATA_DIR/computers/<id> after delete; super admins only
- Models: workspace settings win over a bot's own, then the defaults
- Pictures for bots and workspaces; bots editable from the header
- Coordinator tools: update_workspace, set_bot_workspace_instructions

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/utils/profile-image-urls.ts

@@ -0,0 +1,18 @@
+type Params = {
+    /**
+     * A bot's or workspace's `image_media_id`.
+     */
+    media_id?: number | string | null;
+};
+
+/**
+ * Where a bot's or workspace's picture is served (a private image, so
+ * only its owner can load it). Empty when it has none.
+ */
+export default function profileImageUrls({ media_id }: Params) {
+    if (!media_id) return {};
+
+    const src = `/media/private/${media_id}`;
+
+    return { src, thumbnail_src: `${src}/thumbnail` };
+}