fix: sanitize control characters in terminal output

[tengfeiwang1]

Summary

Fixes #1950 - Terminal output with \r\n or standalone \r causes interface misalignment in Ink-based UI.

Problem

When tool output contains Windows-style line endings (\r\n) or standalone carriage returns (\r), the terminal interface becomes misaligned because the carriage return moves the cursor to the beginning of the line without advancing, causing subsequent content to overwrite previous content.

Solution

Following Claude Code's approach to terminal output handling, this PR adds a sanitization layer that:

1. Normalizes \r\n to \n (Windows line endings)
2. Converts standalone \r to \n (progress bar scenarios)
3. Removes other problematic control characters

Files Changed

• New: packages/core/src/utils/controlCharSanitizer.ts - Core sanitization utility
• New: packages/core/src/utils/controlCharSanitizer.test.ts - 12 unit tests
• Modified: packages/core/src/tools/shell.ts - Apply sanitization at tool layer
• Modified: packages/cli/src/ui/hooks/shellCommandProcessor.ts - Apply sanitization for real-time output
• Modified: packages/core/src/utils/terminalSerializer.ts - Apply sanitization at serialization layer

Testing

• ✅ 12/12 unit tests for controlCharSanitizer
• ✅ 53/53 tests for shell.test.ts
• ✅ 3686/3688 total tests passing
• ✅ No regression issues

Checklist

• Code follows project style guidelines
• Tests added and passing
• No regression issues
• Commit message follows conventional commits