Mindwtr 0.6.19

Highlights

Strengthened sync correctness across core, desktop, and mobile, including attachment-state persistence, earlier timestamp normalization, and stricter merged settings sanitization.
Improved mobile experience with better sync cadence behavior, safer widget data handling, Copilot loading feedback, and smoother quick-add flow.
Improved desktop task/attachment UX with stale-load guards, blob URL lifecycle cleanup, accessibility error announcements, and filtering feedback.
Hardened cloud and MCP surfaces with stricter validation, bounded rate-limiting, and pagination improvements.

Fixed desktop sync dropping attachment mutation metadata after attachment processing.
Moved timestamp normalization before merge conflict resolution to avoid inconsistent winners.
Added merged-settings sanitization safeguards to avoid malformed remote settings corrupting local state.
Aligned task visibility behavior between helper filtering and query paths.
Added additional sync race coverage (delete-vs-update, rapid add/delete interleaving, cloud merge edge cases).

Fixed attachment audio loading race conditions and cleaned up blob URLs on unmount.
Added screen-reader friendly attachment error announcements.
Added filtering/loading indicator in large filtered list views.
Reduced task row rerender overhead by stabilizing/memoizing key callbacks and props.

Hardened cloud API security and resilience: stricter token/path handling, pagination, and bounded rate-limit key growth.
Added cloud merge tests for delete/update race behavior.
Tightened MCP tool input schemas and made preflight migration failures explicit.
Enabled TestFlight external tester notifications in iOS/macOS App Store workflows.