[Feature Request] Support Shift+Enter for line breaks in prompt input

Bug Description
I would be so happy to be able to input a linebreak with Shift+Enter like it's possible in Slack or Github. I keep being told it works with Cmd, but doesn't reliably, which often leads to me sending out half-baked prompts which confuse my dear friend Claude.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 2.1.138
• Feedback ID: 99856397-dc8f-46d5-b5c3-d5bb2580cb55

Errors

[{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:113:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:121:12890)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:120:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:243:22)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-12T14:22:05.574Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:113:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:121:12890)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:120:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:243:22)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-12T15:08:51.885Z"},{"error":"Error: ECONNREFUSED\n    at from (/$bunfs/root/src/entrypoints/cli.js:113:7862)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:121:12890)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:120:1149)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:243:22)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-12T15:42:34.500Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:121:13305)\n    at emit (node:events:92:22)\n    at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:120:3321)\n    at request (/$bunfs/root/src/entrypoints/cli.js:123:2467)\n    at async y_8 (/$bunfs/root/src/entrypoints/cli.js:436:4889)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T01:25:36.851Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:6192)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-05-13T08:08:54.525Z"}]