Fix plan-saver routing plans to wrong projects
Remove "Strategy 2" fallback that routed plans to the most recently
active session when no exact slug match was found. This caused plans
from different projects to be incorrectly saved to whichever project
was most recently active.
Now plans are only saved when an exact slug match exists in sessions.json.
Plans without matching sessions remain in ~/.claude/plans/ but aren't
copied to any project directory.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>