[Feature Request] Expand AskUserQuestion "Other" input field to support multiline responses

Bug Description
Title: Make AskUserQuestion "Other" input box larger / multiline Problem: When Claude calls the AskUserQuestion tool, the UI shows the option list plus an "Other" free-text input. The "Other" field is currently very small — only one short line of text is visible. When I want to write a longer custom answer (e.g., explaining a reason, listing constraints, or describing a 3rd path the model didn't enumerate), the input feels cramped and I can't see what I've typed. Proposed solution (any one of these would help): 1. A new settings.json field, e.g. "askUserQuestion.inputLines": 5, to set a fixed visible height for the "Other" textarea. 2. Auto-expand the textarea up to N lines as the user types, similar to the main prompt input. 3. Allow the textarea to fill the available terminal height when focused. Why it matters: For complex planning conversations, "Other" is often where the real signal lives — the user's nuanced answer that breaks the model's preset options. A 1-line textarea actively discourages that and pushes users back to plain chat, defeating the structured-question UX. Environment: Claude Code CLI (terminal TUI), macOS.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.119
• Feedback ID: b4f6cc36-5a12-4b09-9408-a8bbddf69c32

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/zzy/.local/share/claude/versions/2.1.119 (expected in multi-process scenarios)\n    at mH6 (/$bunfs/root/src/entrypoints/cli.js:2736:2177)\n    at E$8 (/$bunfs/root/src/entrypoints/cli.js:2736:1257)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:18:31.690Z"},{"error":"AxiosError: Request failed with status code 404\n    at zl (/$bunfs/root/src/entrypoints/cli.js:114:1194)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:12696)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:865:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:38:24.750Z"},{"error":"AxiosError: Request failed with status code 404\n    at zl (/$bunfs/root/src/entrypoints/cli.js:114:1194)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:12696)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:865:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:38:41.621Z"},{"error":"AxiosError: Request failed with status code 404\n    at zl (/$bunfs/root/src/entrypoints/cli.js:114:1194)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:119:12696)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:865:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/src/entrypoints/cli.js:121:2467)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-04-25T12:38:45.513Z"}]