`deck_pull_list` emits multiple identical "Not in collection" section headings

[kapunga]

Symptom

On Pirates Ahoy two separate ### Not in collection sections appear, one containing the HOB cards and one containing the MSC cards. The heading is supposed to tell you which set to go pull from, so two identically-labelled sections defeat the purpose.

Root cause

packages/mcp-server/src/views/pull-list-view.ts:

• Line 135: when a card has no printing in an owned set, the item is pushed with the literal setName: 'Not in collection' but keeps its real setCode.
• groupBySet (line 184) keys groups by setCode, then labels each group with items[0].setName (line 206) and sorts by setName (line 211).

So HOB and MSC become two groups with the same label. The same construction exists in the Electron app at packages/electron-app/src/hooks/usePullList.ts:240 and :315, so the desktop pull list has the same collision.

Fix

Keep the real set name/code in setName and carry "not in collection" as a separate flag on PullListItem / PullListGroup (there is already precedent: rarityAboveCollectionLevel). Render it as a heading suffix (### HOB — not in collection) or a column. Since PullListItem lives in shared and both renderers consume it, fix it there once.

Pairs with the set-name resolution issue (### 2XM vs ### Assassin's Creed).