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

README.md

@@ -14,11 +14,19 @@ BusyMirror mirrors meetings between your calendars so your availability stays co
 Use one calendar’s confirmed meetings to block time in other calendars (e.g., corporate iPad vs. personal devices).
 
 ## Build (macOS)
+Option A — Xcode
 1. Open `BusyMirror.xcodeproj` in Xcode.
 2. Select the BusyMirror scheme → My Mac.
 3. Product → Build.  
 4. Product → Archive → Distribute App → Copy App (no notarization) to export a `.app` (or ZIP it for sharing).
 
+Option B — Makefile (reproducible)
+- Build Release: `make build-release`
+- Package ZIP: `make package` (creates `BusyMirror-<version>-macOS.zip` + `.sha256`)
+- Built app: `build/DerivedData/Build/Products/Release/BusyMirror.app`
+
+See `CHANGELOG.md` for notable changes.
+
 ## Roadmap
 See [ROADMAP.md](ROADMAP.md)