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/functions/backend/db/bot-sessions/grab-active-bot-session.ts

@@ -0,0 +1,28 @@
+import type { BUN_SQLITE_COBBLE_BOT_SESSIONS } from "@/db/types/db";
+import BunSQLite from "@moduletrace/bun-sqlite";
+
+type Params = {
+    bot_id: number | string;
+    /**
+     * Null or undefined: the bot's own chat.
+     */
+    workspace_id?: number | string | null;
+};
+
+/**
+ * The active session of one conversation (a bot in its own chat or in one
+ * workspace), or null when it has none yet.
+ */
+export default async function grabActiveBotSession({
+    bot_id,
+    workspace_id,
+}: Params): Promise<BUN_SQLITE_COBBLE_BOT_SESSIONS | null> {
+    const res = await BunSQLite.sql<BUN_SQLITE_COBBLE_BOT_SESSIONS>({
+        sql: `SELECT * FROM bot_sessions
+            WHERE bot_id = ? AND workspace_id IS ? AND status = 'active'
+            ORDER BY id DESC LIMIT 1`,
+        values: [bot_id, workspace_id ? Number(workspace_id) : null],
+    });
+
+    return res.payload?.[0] || null;
+}