fix: improve request_user_input elicitation forms

[OldKrab]

Codex request_user_input forms currently use short headers as their primary labels and replace selected options with custom text. Use the full question as the title and preserve the selection alongside a nonempty user_note: <text> answer, matching the native Codex CLI.

• Require each primary question, keep its short header as the description, and omit empty option descriptions.
• For isOther questions with options, expose “None of the above” once and collect an optional note with _meta.codex.role: user_note.
• Allocate note IDs from <question_id>_note, adding a numeric suffix when needed to preserve real question IDs, their metadata, and separate answers.
• Use the stable elicitation message “Codex needs your input to continue.”

Selecting “None of the above” and entering a custom answer returns ["None of the above", "user_note: <custom answer>"] for that question.

Validation:

• npm run typecheck
• npm test: 621 passed, 26 skipped
• npm run build
• npm run bundle:all: all six targets pass
• New regression cases cover both question orders, occupied note suffixes, metadata preservation, note routing, and an existing “None of the above” option. All three fail against the original handler.
• Live Codex 0.154.0 Plan-mode smoke: preserved the Other selection plus trimmed note and a separate question whose ID collides with the preferred note field; Codex echoed both independent answers.