new /config "Show code diff footer" does not seemingly do anything.

Bug Description
new line in /config "Show code diff footer" does not seemingly do anything. It's not documented. I could imagine it would show/not show how many lines were added/deleted after a file update, but alas.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.12
• Feedback ID: d07b6a4a-2b65-4935-96cf-3ef97939c998

Errors

[{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n    at Rp (B:/~BUN/root/claude.exe:523:81267)\n    at $A (B:/~BUN/root/claude.exe:523:6394)\n    at oH (B:/~BUN/root/claude.exe:523:4896)","timestamp":"2026-01-19T19:21:31.086Z"},{"error":"EBUSY: resource busy or locked, open 'C:\\Users\\mpotanin\\.claude\\statsig\\statsig.failed_logs.658916400'","timestamp":"2026-01-19T19:21:31.418Z"},{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n    at Rp (B:/~BUN/root/claude.exe:523:81267)\n    at $A (B:/~BUN/root/claude.exe:523:6394)\n    at oH (B:/~BUN/root/claude.exe:523:4896)","timestamp":"2026-01-19T19:21:33.096Z"},{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n    at Rp (B:/~BUN/root/claude.exe:523:81267)\n    at $A (B:/~BUN/root/claude.exe:523:6394)\n    at oH (B:/~BUN/root/claude.exe:523:4896)","timestamp":"2026-01-19T19:21:33.099Z"},{"error":"EBUSY: resource busy or locked, open 'C:\\Users\\mpotanin\\.claude\\statsig\\statsig.failed_logs.658916400'","timestamp":"2026-01-19T19:22:09.457Z"},{"error":"EBUSY: resource busy or locked, open 'C:\\Users\\mpotanin\\.claude\\statsig\\statsig.failed_logs.658916400'","timestamp":"2026-01-19T19:22:09.457Z"},{"error":"Error: 429 {\"type\":\"error\",\"error\":{\"type\":\"rate_limit_error\",\"message\":\"This request would exceed your account's rate limit. Please try again later.\"},\"request_id\":\"req_011CXHHEhPGeyum5MGyset56\"}\n    at generate (B:/~BUN/root/claude.exe:866:2295)\n    at makeRequest (B:/~BUN/root/claude.exe:883:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-01-19T19:22:09.642Z"},{"error":"EBUSY: resource busy or locked, open 'C:\\Users\\mpotanin\\.claude\\statsig\\statsig.failed_logs.658916400'","timestamp":"2026-01-19T19:22:12.941Z"},{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n    at Rp (B:/~BUN/root/claude.exe:523:81267)\n    at $A (B:/~BUN/root/claude.exe:523:6394)\n    at oH (B:/~BUN/root/claude.exe:523:4896)","timestamp":"2026-01-19T19:22:13.556Z"},{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n    at Rp (B:/~BUN/root/claude.exe:523:81267)\n    at $A (B:/~BUN/root/claude.exe:523:6394)\n    at oH (B:/~BUN/root/claude.exe:523:4896)","timestamp":"2026-01-19T19:22:13.562Z"},{"error":"Error: Tool mcp__ide__getDiagnostics not found\n    at TWI (B:/~BUN/root/claude.exe:2561:6640)\n    at uW (B:/~BUN/root/claude.exe:523:20763)\n    at lV (B:/~BUN/root/claude.exe:523:39155)\n    at xp (B:/~BUN/root/claude.exe:523:49774)\n    at SR (B:/~BUN/root/claude.exe:523:86045)\n    at Vt (B:/~BUN/root/claude.exe:523:85019)\n    at kp (B:/~BUN/root/claude.exe:523:84844)\n

Note: Error logs were truncated.