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.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, test } from "bun:test";
+import profileImageUrls from "./profile-image-urls";
+
+describe("profileImageUrls", () => {
+    test("serves a picture privately, with a thumbnail", () => {
+        expect(profileImageUrls({ media_id: 7 })).toEqual({
+            src: "/media/private/7",
+            thumbnail_src: "/media/private/7/thumbnail",
+        });
+    });
+
+    test("is empty without a picture", () => {
+        expect(profileImageUrls({ media_id: null })).toEqual({});
+        expect(profileImageUrls({})).toEqual({});
+    });
+});