See one person's overdue Nutshell and TickTick work

**Objective:** Produce one overdue list for `{person-name}` covering Nutshell tasks and activities and TickTick tasks, as of today.

**Step 1: Nutshell**

Call `nutshell-get-user` (nutshell server) with `name.contains` set to `{person-name}`; stop if not exactly one match. Call `nutshell-get-task` with `assignee-id` and `overdue` true, and `nutshell-get-activity` with `overdue` true (both nutshell server).

**Step 2: TickTick**

Call `ticktick-get-tasks` (TickTick server) with `assignee` set to the person's TickTick username if known (otherwise `{person-name}`), open `status` and `due-date.to` set to yesterday.

**Step 3: Report**

One table sorted by days overdue: source (Nutshell or TickTick), title, due date, days overdue, related record or project. Flag items that appear in both systems. End with totals per source and the three oldest items.

**Rules & Guidelines:**

* Read-only. Do not call `ticktick-complete-task`, `ticktick-update-task`, `ticktick-batch-tasks` or any Nutshell add, update or delete tool.

**Validation:**

* If one side returns nothing, show the other and say which side was empty.
* If the TickTick assignee filter returns nothing, say the name may not match a TickTick username.