[Feature Request] Add configurable text color for user prompts in terminal output

Bug Description
"Accessibility: allow user prompt color customization in config. Users with dyslexia cannot distinguish their prompts from assistant messages when scrolling back."

Environment Info

• Platform: linux
• Terminal: vscode
• Version: 2.1.47
• Feedback ID: 7ac9d442-3fdd-4bf6-a283-f02a8c8eb4d9

Errors

[{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n    at D6H (/$bunfs/root/claude:1848:31628)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:21.703Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n    at D6H (/$bunfs/root/claude:1848:31628)\n    at async F (/$bunfs/root/claude:3698:15284)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:22.036Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n    at D6H (/$bunfs/root/claude:1848:31628)\n    at async Q (/$bunfs/root/claude:3698:15800)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:22.036Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n    at D6H (/$bunfs/root/claude:1848:31628)\n    at async F (/$bunfs/root/claude:3698:15284)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:22.061Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server greptile invalid: Missing environment variables: GREPTILE_API_KEY\n    at D6H (/$bunfs/root/claude:1848:31628)\n    at async Q (/$bunfs/root/claude:3698:15800)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:22.061Z"},{"error":"Error: LSP server plugin:rust-analyzer-lsp:rust-analyzer crashed with exit code 1\n    at <anonymous> (/$bunfs/root/claude:2378:21470)\n    at emit (node:events:98:22)\n    at #handleOnExit (node:child_process:520:14)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:16:22.490Z"},{"error":"Error\n    at IR (/$bunfs/root/claude:42:1144)\n    at <anonymous> (/$bunfs/root/claude:43:10097)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:45:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:27:26.947Z"},{"error":"Error\n    at IR (/$bunfs/root/claude:42:1144)\n    at <anonymous> (/$bunfs/root/claude:43:10097)\n    at emit (node:events:92:22)\n    at endReadableNT (internal:streams/readable:861:50)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:45:2149)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-18T22:27:27.454Z"}]