v0.5.9

Changed

• Config tab descriptions rewritten for non-technical users: ~70 field
  descriptions across config-sections.ts and config-vision-fields.ts
  rewritten in plain language from the user perspective. Removed internal
  jargon (ADR references, code shapes like {type:'enabled',keep:'all'},
  internal field names) while keeping defaults, units, and key behaviors
  visible. Reviewed by Oracle — 6 accuracy fixes applied after initial
  rewrite (HTTP/2 perf claim, circuit breaker trigger wording, opencode-only
  limitation on ID rewrite, vision intent strategy description, GLM rule
  jargon, circuit breaker section wording).