[Feature Request] Display remaining context in Plan mode before accepting edits

Bug Description
during end of Plan mode, before transitioning to 'accept edits' mode -I'd like to know how much context is left (just show my statusline, it has that info), so that I can decide whether to clear context or not. I'd prefer not to clear context as it'll have valuable info (that a plan file won't capture), IMO

Environment Info

• Platform: darwin
• Terminal: ghostty
• Version: 2.1.39
• Feedback ID: a91a17a4-952c-4666-8ba0-28643377449a

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/curie-std/.local/share/claude/versions/2.1.39 (expected in multi-process scenarios)\n    at wVR (/$bunfs/root/claude:3626:2098)\n    at DjA (/$bunfs/root/claude:3626:1209)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-12T05:05:13.690Z"}]