normalizeStoredSpeakerCount accepts boolean true and array values as valid speaker counts

[hsusul]

Describe the bug

In src/helpers/speakerCount.js:

normalizeStoredSpeakerCount(value) converts its input using const count = Number(value) and checks Number.isInteger(count) && count >= 1.

In JavaScript:

• Number(true) is 1, so normalizeStoredSpeakerCount(true) returns 1.
• Number(["2"]) is 2, so normalizeStoredSpeakerCount(["2"]) returns 2.

When non-numeric types (such as booleans or arrays) arrive via cloud sync or loosely structured stored data, normalizeStoredSpeakerCount erroneously returns an integer instead of degrading to null.

To Reproduce

1. Call normalizeStoredSpeakerCount(true) -> returns 1 (expected null).
2. Call normalizeStoredSpeakerCount(["2"]) -> returns 2 (expected null).

Expected Behavior

normalizeStoredSpeakerCount should only accept numbers or numeric strings (typeof value === "number" || typeof value === "string"), returning null for booleans, arrays, and other non-numeric types.

[Chadpiha]

Closing together with #1834 — full reasoning over there. Thanks for the report, @hsusul!