BusyMirror 1.2.3: reliable settings autosave/restore; remember source/target; @MainActor fixes; reinit EKEventStore after grant; Makefile; changelog + release notes

ReleaseNotes-1.2.3.md

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+# BusyMirror 1.2.3 — 2025-10-10
+
+This release focuses on reliable settings persistence and quality-of-life fixes from the 1.2.1 hotfix.
+
+Highlights
+- Settings persist between runs: autosave key options on change; restore on launch.
+- Source/Target selection is remembered using calendar IDs and rehydrated into UI indices.
+
+Fixes and improvements
+- Save on change for: days back/forward, default merge gap, privacy/copy notes, all-day, accepted-only, overlap mode, title/placeholder prefixes, auto-delete.
+- Restore saved `selectedSourceID` and `selectedTargetIDs` and rebuild index selections.
+- Keep backward compatibility with older saved payloads.
+- Version bump to 1.2.3 (build 5).
+
+Included from 1.2.1
+- Reinitialize `EKEventStore` after permission grant to avoid “Loaded 0 calendars”.
+- Use attendee `participantStatus == .accepted` for accepted-only filter.
+- Mark `requestAccess()` and `reloadCalendars()` as `@MainActor`.
+- Makefile for reproducible builds and packaging.
+
+Build
+- `make build-release`
+- `make package` → BusyMirror-1.2.3-macOS.zip and .sha256
+