feat(cli): abbreviate large pasted text and optimize paste performance

[marius-kilocode]

Summary

• Abbreviate large pasted text (10+ lines) as [Pasted text #N +X lines] to prevent input field overflow when pasting logs or large code blocks
• Fix paste performance by skipping unnecessary clipboard image checks for bracketed pastes

Changes

• Add processPastedText.ts utilities for handling pasted text references (extract, remove, expand)
• Add pasted text reference atoms in keyboard.ts with handlePaste function
• Expand references to full content in useMessageHandler.ts before sending messages
• Optimize KeyboardProvider.tsx to skip osascript clipboard check for bracketed pastes
• Permance is optimized, just takes a few ms for a very large text

How it works

• Pastes with 10+ lines are stored and displayed as [Pasted text #1 +X lines]
• References are expanded to full content when the message is submitted
• Image pasting via Cmd+V still works (clipboard check only runs for explicit Cmd+V)
• Regular terminal paste (bracketed paste mode) is now instant

[changeset-bot]

🦋 Changeset detected

Latest commit: 2a56107

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@kilocode/cli	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[kiloconnect]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Overview

This PR implements a clean solution for abbreviating large pasted text in the CLI input. When users paste text with 10+ lines, it displays a compact reference like [Pasted text #1 +25 lines] instead of the full content, preventing input field overflow. The full text is stored and expanded when the message is sent.

Key Implementation Details:

• New processPastedText.ts module with regex-based reference parsing
• Jotai atoms for managing pasted text references (pastedTextReferencesAtom, pastedTextReferenceCounterAtom)
• handlePaste function with efficient early-exit line counting
• Integration with useMessageHandler to expand references before sending
• Simplified KeyboardProvider by removing unused paste buffer atoms

Code Quality:

• ✅ Comprehensive test coverage for all new functionality
• ✅ Proper TypeScript types throughout
• ✅ Clear separation of concerns
• ✅ Good documentation comments
• ✅ Follows existing codebase patterns

Files Reviewed (7 files)

• .changeset/abbreviate-large-pasted-text.md - Changeset
• cli/src/media/processPastedText.ts - New helper functions
• cli/src/media/__tests__/processPastedText.test.ts - Tests for helpers
• cli/src/state/atoms/keyboard.ts - Pasted text atoms and handlePaste
• cli/src/state/atoms/__tests__/keyboard.test.ts - Paste abbreviation tests
• cli/src/state/hooks/useMessageHandler.ts - Reference expansion
• cli/src/ui/providers/KeyboardProvider.tsx - Simplified paste handling