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/create-bot-session.ts

@@ -0,0 +1,51 @@
+import type {
+    BUN_SQLITE_COBBLE_BOT_SESSIONS,
+    BunSQLiteTables,
+} from "@/db/types/db";
+import BunSQLite from "@moduletrace/bun-sqlite";
+
+type Params = {
+    bot_id: number | string;
+    workspace_id?: number | string | null;
+    /**
+     * The session this one carries on from.
+     */
+    previous_session_id?: number | null;
+};
+
+/**
+ * Starts an active session in a conversation. Callers close the old one
+ * first (`startBotSession`).
+ */
+export default async function createBotSession({
+    bot_id,
+    workspace_id,
+    previous_session_id,
+}: Params): Promise<BUN_SQLITE_COBBLE_BOT_SESSIONS> {
+    const now = Date.now();
+
+    const row: BUN_SQLITE_COBBLE_BOT_SESSIONS = {
+        bot_id: Number(bot_id),
+        workspace_id: workspace_id ? Number(workspace_id) : undefined,
+        previous_session_id: previous_session_id || undefined,
+        status: "active",
+        unread: 0,
+        last_activity_at: now,
+    };
+
+    const res = await BunSQLite.insert<
+        BUN_SQLITE_COBBLE_BOT_SESSIONS,
+        (typeof BunSQLiteTables)[number]
+    >({
+        table: "bot_sessions",
+        data: [row],
+    });
+
+    const id = res.singleRes?.id || res.postInsertReturn?.insertId;
+
+    if (!res.success || !id) {
+        throw new Error(`Couldn't start a session: ${res.msg}`);
+    }
+
+    return { ...row, id, created_at: now, updated_at: now };
+}