feat(attachments): add in-app camera capture
feat(message-details): show total conversation tokens
feat(local-search): add configurable provider fallbacks
fix(chat-ui): simplify empty-state and Mind/Meld copy
fix(message-details): include cumulative API token usage
fix(composer): remove visible input placeholder
fix(mind-meld): reset stale hidden model selections
fix(mac-ui): scale detail text with native font metrics
fix(custom-provider): accept SSE data fields without spaces
fix(mac-chat): restore native searchable model popover