Fixes #5293: Add share button next to send button and shorten 'Start New Task' to 'Start Task'

[roomote]

Summary

This PR implements the feature request from issue #5293 to add a share button next to the send button for improved discoverability of the task sharing functionality.

Changes Made

1. Added ShareButton to ChatTextArea

• Added ShareButton component to the bottom toolbar of ChatTextArea, positioned before the send button
• ShareButton is disabled when send is disabled to maintain consistent UX
• Reuses existing share functionality for seamless integration

2. Enhanced ShareButton Component

• Added optional allowNoItem prop to ShareButton component
• When allowNoItem={true}, the ShareButton renders even when there's no current task
• Maintains backward compatibility with existing usage

3. Updated Button Text Translations

• Changed 'Start New Task' to 'Start Task' across all 18 supported languages:
  • English: 'Start New Task' → 'Start Task'
  • Chinese (Simplified): '开始新任务' → '开始任务'
  • Chinese (Traditional): '開始新工作' → '開始工作'
  • Russian: 'Начать новую задачу' → 'Начать задачу'
  • And 14 other languages

Technical Details

• Files Modified: 20 files total

  • 1 component enhancement (ShareButton.tsx)
  • 1 component integration (ChatTextArea.tsx)
  • 18 translation files updated

• Backward Compatibility: All existing ShareButton usage remains unchanged

• Type Safety: All changes are fully typed with TypeScript

• Accessibility: Maintains existing accessibility patterns

Testing

• ✅ All linting checks passed
• ✅ All type checking passed
• ✅ Existing functionality preserved
• ✅ New functionality integrated seamlessly

UI/UX Impact

• Improved discoverability of share functionality
• Cleaner, more concise button text
• Consistent button states (disabled when appropriate)
• Maintains existing design patterns

Closes #5293

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Important

Add a share button to ChatTextArea.tsx and update 'Start New Task' to 'Start Task' in 18 languages.

• Behavior:
  • Add ShareButton to ChatTextArea.tsx, positioned before the send button, disabled when send is disabled.
  • ShareButton uses existing share functionality.
• Component Enhancements:
  • Add allowNoItem prop to ShareButton in ShareButton.tsx to render without a current task.
• Translations:
  • Update 'Start New Task' to 'Start Task' in 18 language files, including English, Chinese, Russian, etc.
• Misc:
  • Ensure backward compatibility for ShareButton usage.
  • All changes are fully typed with TypeScript.

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to 6b17ae3.

Security Overview

• 🔎 Scanned files: 20 changed file(s)

Detected Code Changes

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