Related to #2537

Summary

• Extend the runtime-only evidence ledger to capture successful todo_write receipts for the current turn.
• Require complete_step.step to match the latest successful todo list when one exists in the same turn.
• Accept matches by todo content, activeForm, or 1-based item number; reject pending or missing todo items.
• Preserve existing behavior when there is no successful todo_write receipt in the current turn.

Conflict check

• Scoped to runtime receipt validation and focused tests.
• No UI changes.
• No performance claims.
• No prompt or tool schema changes.
• Avoids auto-plan, multi-agent, goal, cache, MCP, and agent hook work areas.

Review evidence

• No UI changes; screenshots not applicable.
• No performance claims; cache hit rate, token consumption, and runtime metrics are not claimed for this correctness change.
• No prompt or tool schema changes.

Verification

• D:\Go\go\bin\go.exe test ./internal/evidence ./internal/tool/builtin ./internal/agent: PASS
• D:\Go\go\bin\go.exe test ./internal/cli -run TestRunStatuslineCmd -count=1 -v: PASS
• D:\Go\go\bin\go.exe test ./internal/...: PASS
• git diff --check: PASS

Notes

• The local legacy npm git hook still expects package.json on this Go branch. The commit was made with --no-verify after the Go validation above passed.