fix(AskUserQuestion): always include questions key and use question text as answer key

[sudo-yf]

Problem

Two bugs in Sources/CodeIsland/AppState.swift cause AskUserQuestion to fail when used through the CodeIsland hook:

Bug 1: H.map undefined crash

askUserQuestionUpdatedInput conditionally set updatedInput["questions"] only when the [[String: Any]] cast succeeded:

if let originalQuestions {
    updatedInput["questions"] = originalQuestions
}

Claude Code's mapToolResultToToolResultBlockParam destructures the hook result as {questions: H, answers: _, annotations: q} and immediately calls H.map(). If the questions key is absent, H is undefined and the call throws:

undefined is not an object (evaluating 'H.map')

Bug 2: All answers returned as empty strings

handleAskUserQuestion built answerKey from the question's header field:

let baseKey = (trimmedHeader?.isEmpty == false ? trimmedHeader : nil) ?? "answer_\(index + 1)"

Claude Code looks up answers by question text: answers[question.question]. Using the header as the dictionary key means every lookup misses, and all answers come back as empty strings.

Fix

Bug 1 — always write the questions key, falling back to the raw toolInput value when the cast fails:

updatedInput["questions"] = originalQuestions ?? (event.toolInput?["questions"] ?? [] as [[String: Any]])

Bug 2 — use questionText as the answer key to match Claude Code's lookup:

let baseKey = questionText

Testing

Verified with a 4-option AskUserQuestion call containing Chinese text in header/label/description fields. Before the fix: crash or empty answers. After: popup renders correctly and all selected answers are returned to Claude Code.