Prototype tests: each worker is found through its card

Test code only: src/server/ideas.test.ts, commit 49ba3fe2

The problem

The tests took the first worker to start as the first prototype's worker. Since git prepares workspaces in the background, workers start in no set order. Under load, a handover now and then landed on the wrong prototype: "Wortmarke" showed no demo, and the base prototype showed one.

The change

+ const workerOf = (cardId) => workers().find((w) => w.spec.cwd === board().row(cardId).workspace)!;

- handOver(workers()[0]!, 'Wortmarke.', 'a');
+ handOver(workerOf(all[0]!.id), 'Wortmarke.', 'a');
- const [w, wOther] = workers();
+ const [w, wOther] = [workerOf(chosen!.id), workerOf(other!.id)];
- const [w] = workers();
+ const w = workerOf(film!.id);

Two more tests made the same assumption: "Diesen Prototyp bauen" (it failed in one of my runs too) and "Als Projekt planen". Both are fixed as well.

Verification

Other tests failed in the full runs, unrelated to this change: the settings tests in canvas.test.ts, browser skill, silent speech and clones. Each time it was a timeout after about 5 s, with the machine at a load average of 157. Run on their own, they pass.