[Bug] Extreme memory usage peak (13GB) in v2.1.27 with plan mode and screenshots

Bug Description

Bug: Extreme memory usage in Claude Code 2.1.27 (13GB peak on 8GB system)

### Environment

• Claude Code version: 2.1.27
• macOS: 26.2 (Darwin 25.2.0)
• RAM: 8GB
• Model: claude-opus-4-5-20251101

### Issue
Claude Code is consuming extreme amounts of memory - peaked at 13GB on an 8GB system, causing severe swap thrashing
and system slowdown.

### Evidence
Physical footprint: 3.3G
Physical footprint (peak): 13.0G

System state during issue:

• CPU: 78% by claude process
• Memory: 81.7% used
• Swap: 83.8% (5GB/6GB)
• Free RAM: 1.5GB ^V�^V�^V� 83MB …

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