[Feature Request] Add directory autocompletion in shell mode (!)

Bug Description
I would like to have directories autocomplete on the terminal interface when using the ! mode.

Environment Info

• Platform: darwin
• Terminal: tmux
• Version: 2.1.94
• Feedback ID: bcd26b1f-9745-4505-a231-6c0cd987a105

Errors

[{"error":"RangeError [ERR_CHILD_PROCESS_STDIO_MAXBUFFER]: stdout maxBuffer length exceeded\n    at Socket.onChildStdout (node:child_process:481:14)\n    at Socket.emit (node:events:524:28)\n    at addChunk (node:internal/streams/readable:561:12)\n    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)\n    at Readable.push (node:internal/streams/readable:392:5)\n    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)","timestamp":"2026-04-08T00:12:23.543Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n    at $N.<anonymous> (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:116:13071)\n    at $N.emit (node:events:524:28)\n    at Timeout._onTimeout (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:115:3292)\n    at listOnTimeout (node:internal/timers:594:17)\n    at process.processTimers (node:internal/timers:529:7)\n    at Tg6.request (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:118:2450)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Bh1 (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:509:3691)","timestamp":"2026-04-08T00:12:33.757Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n    at $N.<anonymous> (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:116:13071)\n    at $N.emit (node:events:524:28)\n    at Timeout._onTimeout (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:115:3292)\n    at listOnTimeout (node:internal/timers:594:17)\n    at process.processTimers (node:internal/timers:529:7)\n    at Tg6.request (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:118:2450)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Bh1 (file:///Users/roberto.antelo/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:509:3691)","timestamp":"2026-04-08T00:13:03.941Z"}]