feat(community): TrustFeedbackButtons + useTrustFeedback -- trust signal UI on ListingCard [MIT]
Files: web/src/composables/useTrustFeedback.ts, web/src/components/TrustFeedbackButtons.vue, web/src/components/ListingCard.vue
- useTrustFeedback composable: FeedbackState machine (idle/sending/confirmed/disputed), fail-soft fetch, always confirms regardless of network outcome
- TrustFeedbackButtons.vue: "This score looks right / This score is wrong" button pair with calm "Thanks, noted." confirmation; uses --trust-high/--trust-low theme CSS vars; aria-live="polite", aria-busy, focus-visible, prefers-reduced-motion, no countdown timers
- ListingCard.vue: TrustFeedbackButtons slotted after trust badge inside .card__score-col