fix(replay): restore sidebar entry switching

[beruro]

Summary

• synchronize sidebar entry clicks with the Code Editor replay content mode
• keep explicit command selections visible while another command is running
• add regression coverage for automatic live-command following and manual selection priority

Closes #457

Validation

• focused resolveSelectedOperations Vitest
• pre-commit scoped TypeScript, ESLint, and Prettier checks
• GitHub Frontend and Rust CI passed

Merge order

This PR overlaps #448 in SessionReplay/index.tsx. Land #448 first, then refresh this branch and preserve both event-scoped FILES READ selection and explicit Terminal/Explore/Tool panel-mode switching.

[beruro]

Merge-order note: this PR overlaps #448 in SessionReplay/index.tsx. Please land #448 first; then refresh this branch and preserve both event-scoped FILES READ selection and explicit Terminal/Explore/Tool panel-mode switching.