Update docs content to match current launcher/plugin/runtime structure and fix stale home demo media assets with cache-busted URLs plus poster refresh. Add supporting backlog/subagent tracking records and docs asset regression coverage.
- map segmented Yomitan lines into single logical tokens and improve candidate selection heuristics
- limit frequency lookup to selected token text with POS-based exclusions and add debug logging hook
- add standalone Yomitan parser test script, deterministic utility-script shutdown, and docs/backlog updates