Fix #5236: Resolve ChatView layout shifting and inconsistent spacing

[roomote]

Summary

This PR fixes the layout shifting and inconsistent spacing issues in the ChatView component as described in issue #5236.

Changes Made

1. Fixed AutoApproveMenu Positioning

• Problem: AutoApproveMenu had different CSS classes when task exists vs doesn't exist, causing layout shifts
• Solution: Standardized positioning using class for both states
• Files:

2. Replaced Custom Scroll-to-Bottom Button

• Problem: Custom styling for scroll-to-bottom button was inconsistent with other standard buttons
• Solution: Replaced with standard component with
• Files:

3. Standardized Action Button Area Spacing

• Problem: Inconsistent spacing between UI elements at the bottom of ChatView
• Solution: Added consistent spacing with fixed padding () in action button areas
• Files:

Technical Details

The main issues were caused by:

1. Different CSS classes ( vs ) for AutoApproveMenu positioning
2. Custom button styling instead of using VSCode's standard button components
3. Inconsistent padding and margin applications in action areas

Testing

• All linting checks pass
• TypeScript compilation successful
• Layout shifts eliminated through consistent CSS class usage
• Button styling now matches VSCode design system

Fixes

Closes #5236

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Important

Fix layout shifting and inconsistent spacing in ChatView.tsx by standardizing CSS classes and button styling.

• Layout Fixes:
  • Standardized AutoApproveMenu positioning in ChatView.tsx to prevent layout shifts by using consistent CSS classes.
  • Replaced custom scroll-to-bottom button with VSCodeButton for consistent styling.
  • Added consistent spacing and fixed padding for action button areas in ChatView.tsx.
• Testing:
  • Verified layout shifts are eliminated and button styling matches VSCode design system.

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to 727515a.

Security Overview

• 🔎 Scanned files: 1 changed file(s)

Detected Code Changes

The diff is too large to display a summary of code changes.

Reply to this PR with @delve-auditor followed by a description of what change you want and we'll auto-submit a change to this PR to implement it.

[seedlord]

the initial issue and pr touched 4 files.