[Feature Request] Add --quiet flag to suppress progress indicators

I've noticed that VSCode crashes when running claude code in the embedded terminal. Claude gets very busy and the terminal 'flashes' and becomes unreadable and uncontrollable immediatly before a crash.

Bug Description
--quiet flag that suppresses progress indicators while still showing the final result

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.0.67
• Feedback ID:

Errors

[{"error":"Error: 1P event logging: 1 events failed to export\n    at Vj1.queueFailedEvents (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:200:90742)\n    at Vj1.doExport (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:200:89841)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-12T21:37:05.104Z"},{"error":"Error: {\"stack\":\"Error: Failed to export 1 events\\n    at Vj1.doExport (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:200:89931)\\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\",\"message\":\"Failed to export 1 events\",\"name\":\"Error\"}\n    at je1.error (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:1558:35484)\n    at dR1.error (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:191:33323)\n    at file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:191:64671\n    at JM3 (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:191:65217)\n    at file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:192:20014\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-12T21:37:05.105Z"},{"error":"A71: Another process is currently installing an update\n    at dOA (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4369:1859)\n    at Object.current (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2297:10950)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-13T02:35:42.039Z"},{"error":"A71: Another process is currently installing an update\n    at dOA (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4369:1859)\n    at Object.current (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2297:10950)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-13T03:05:41.779Z"},{"error":"A71: Another process is currently installing an update\n    at dOA (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4369:1859)\n    at Object.current (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2297:10950)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-13T03:38:00.982Z"},{"error":"A71: Another process is currently installing an update\n    at dOA (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4369:1859)\n    at Object.current (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2297:10950)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-13T04:08:00.765Z"},{"error":"A71: Another process is currently installing an update\n    at dOA (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:4369:1859)\n    at Object.current (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:2297:10950)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-12-13T04:38:00.738Z"},{"error":"AxiosError: Request failed with status code 401\n    at aj (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:56:1137)\n    at IncomingMessage.<anonymous> (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:57:9852)\n    at IncomingMessage.emit (node:events:536:35)\n    at IncomingMessage.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1698:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at qKA.request (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:59:2130)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async hZ5 (file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3212:460)\n    at async Promise.all (index 0)\n    at async file:///Users/kdm/.nvm/versions/node/v22.12.0/lib/node_modules/@anthropic-ai/claude-code/cli.js:3198:7016","timestamp":"2025-12-13T08:19:13.91

Note: Error logs were truncated.