feat(widget): calendar filter config + fix group-view data leak

Bug fix: publishWidgetSnapshot() now guards against activeGroup != nil,
so group view events/colors never contaminate the widget cache.

Feature: widgets can now be configured via long-press → Edit Widget.
- WidgetCalendar struct + writeCalendars/readCalendars in WidgetData.swift
- calendarKey added to WidgetEvent (backward-compatible decoder)
- CalendarIntent.swift: CalendarAppEntity + CalendarEntityQuery + CalendarSelectionIntent
- CalendarrTimelineProvider migrated from TimelineProvider to AppIntentTimelineProvider
- All 13 StaticConfiguration widgets changed to AppIntentConfiguration
- publishWidgetSnapshot() builds + writes the calendar list for the intent

An empty selection (default) shows all calendars; selecting specific
calendars filters the widget events accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Calendarr iOS.xcodeproj/project.pbxproj

@@ -511,7 +511,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 2.7;
+				MARKETING_VERSION = 2.8;
 				PRODUCT_BUNDLE_IDENTIFIER = com.scarriffleservices.calendarr.ios;
 				PRODUCT_NAME = "Calendarr iOS";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
@@ -555,7 +555,7 @@
 					"$(inherited)",
 					"@executable_path/Frameworks",
 				);
-				MARKETING_VERSION = 2.7;
+				MARKETING_VERSION = 2.8;
 				PRODUCT_BUNDLE_IDENTIFIER = com.scarriffleservices.calendarr.ios;
 				PRODUCT_NAME = "Calendarr iOS";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;

Calendarr iOS/Models/CalendarStore.swift

@@ -438,12 +438,31 @@ class CalendarStore {
     /// covers the worst-case month grid (6 rows × 7 cols) for the calendar
     /// widget. Also asks the system to refresh the widget timeline.
     private func publishWidgetSnapshot() {
+        // Never write group-view data into the widget; it would show other
+        // people's calendar colours and decorated event titles.
+        guard activeGroup == nil else { return }
+
         let cal = userCalendar
         let now = Date()
         // Include the week before today so widgets that show the current week
         // (e.g. "This Week", "Up Next + Calendar") have data for Monday–today.
         let from = cal.date(byAdding: .day, value: -7, to: cal.startOfDay(for: now)) ?? now
         let to   = cal.date(byAdding: .day, value: 42, to: cal.startOfDay(for: now)) ?? from
+
+        // Build the calendar list from all cached events (not just the window)
+        // so every calendar appears in the widget configuration picker.
+        var calendarMap: [String: WidgetCalendar] = [:]
+        for ev in allCachedEvents {
+            let key = Self.calendarKey(source: ev.source, calendarId: ev.calendarId)
+            guard !banishedCalendarKeys.contains(key) else { continue }
+            if calendarMap[key] == nil {
+                calendarMap[key] = WidgetCalendar(id: key,
+                                                  name: ev.calendarName.isEmpty ? ev.calendarId : ev.calendarName,
+                                                  colorHex: ev.calendarColor)
+            }
+        }
+        WidgetStore.writeCalendars(Array(calendarMap.values).sorted { $0.name < $1.name })
+
         let visible = allCachedEvents
             .filter { ev in
                 let key = Self.calendarKey(source: ev.source, calendarId: ev.calendarId)
@@ -460,7 +479,8 @@ class CalendarStore {
                             end: ev.endDate,
                             isAllDay: ev.isAllDay,
                             colorHex: ev.effectiveColor,
-                            location: ev.location)
+                            location: ev.location,
+                            calendarKey: Self.calendarKey(source: ev.source, calendarId: ev.calendarId))
             }
         let defaults = UserDefaults.standard
         let snap = WidgetSnapshot(

CalendarrWidgets/CalendarIntent.swift

@@ -0,0 +1,42 @@
+import AppIntents
+import WidgetKit
+
+/// An individual calendar option shown in the widget configuration picker.
+struct CalendarAppEntity: AppEntity, Identifiable {
+    let id: String
+    let name: String
+    let colorHex: String
+
+    static var typeDisplayRepresentation: TypeDisplayRepresentation = "Kalender"
+    static var defaultQuery = CalendarEntityQuery()
+
+    var displayRepresentation: DisplayRepresentation {
+        DisplayRepresentation(title: LocalizedStringResource(stringLiteral: name))
+    }
+}
+
+/// Reads available calendars from the App Group container so the widget
+/// extension can offer options without a network call.
+struct CalendarEntityQuery: EntityQuery {
+    func entities(for identifiers: [String]) async throws -> [CalendarAppEntity] {
+        let ids = Set(identifiers)
+        return WidgetStore.readCalendars()
+            .filter { ids.contains($0.id) }
+            .map { CalendarAppEntity(id: $0.id, name: $0.name, colorHex: $0.colorHex) }
+    }
+
+    func suggestedEntities() async throws -> [CalendarAppEntity] {
+        WidgetStore.readCalendars()
+            .map { CalendarAppEntity(id: $0.id, name: $0.name, colorHex: $0.colorHex) }
+    }
+}
+
+/// Widget configuration intent: lets the user pick which calendars to show.
+/// An empty selection means "show all calendars" (the default).
+struct CalendarSelectionIntent: WidgetConfigurationIntent {
+    static var title: LocalizedStringResource = "Kalender auswählen"
+    static var description = IntentDescription("Wähle welche Kalender im Widget angezeigt werden. Leer = alle Kalender.")
+
+    @Parameter(title: "Kalender")
+    var selectedCalendars: [CalendarAppEntity]
+}

CalendarrWidgets/CalendarrTimelineProvider.swift

@@ -1,33 +1,57 @@
 import WidgetKit
+import AppIntents
 
 struct CalendarrEntry: TimelineEntry {
     let date: Date
     let snapshot: WidgetSnapshot?
 }
 
-struct CalendarrTimelineProvider: TimelineProvider {
+struct CalendarrTimelineProvider: AppIntentTimelineProvider {
+    typealias Entry = CalendarrEntry
+    typealias Intent = CalendarSelectionIntent
+
     func placeholder(in context: Context) -> CalendarrEntry {
         CalendarrEntry(date: .now, snapshot: WidgetStore.read())
     }
 
-    func getSnapshot(in context: Context, completion: @escaping (CalendarrEntry) -> Void) {
+    func snapshot(for configuration: CalendarSelectionIntent, in context: Context) async -> CalendarrEntry {
-        completion(CalendarrEntry(date: .now, snapshot: WidgetStore.read()))
+        let raw = WidgetStore.read()
+        return CalendarrEntry(date: .now, snapshot: filtered(raw, by: configuration))
     }
 
-    func getTimeline(in context: Context, completion: @escaping (Timeline<CalendarrEntry>) -> Void) {
+    func timeline(for configuration: CalendarSelectionIntent, in context: Context) async -> Timeline<CalendarrEntry> {
-        let snapshot = WidgetStore.read()
+        let raw = WidgetStore.read()
+        let snap = filtered(raw, by: configuration)
         let now = Date()
 
-        // Provide one entry per hour for the next 24h so the widget keeps
+        // One entry per hour for 24 h so the widget re-renders as time advances.
-        // re-rendering as time progresses (past events drop off, "now" advances).
         var entries: [CalendarrEntry] = []
         for h in 0..<24 {
             let date = Calendar.current.date(byAdding: .hour, value: h, to: now) ?? now
-            entries.append(CalendarrEntry(date: date, snapshot: snapshot))
+            entries.append(CalendarrEntry(date: date, snapshot: snap))
         }
-        // Ask iOS to refresh in 30 min to pick up any new data the app wrote.
         let refreshAt = Calendar.current.date(byAdding: .minute, value: 30, to: now) ?? now
-        completion(Timeline(entries: entries, policy: .after(refreshAt)))
+        return Timeline(entries: entries, policy: .after(refreshAt))
+    }
+
+    // MARK: – Filtering
+
+    private func filtered(_ snapshot: WidgetSnapshot?, by config: CalendarSelectionIntent) -> WidgetSnapshot? {
+        guard let snapshot else { return nil }
+        let ids = config.selectedCalendars.map { $0.id }
+        guard !ids.isEmpty else { return snapshot }   // empty = show all
+        let keep = Set(ids)
+        return WidgetSnapshot(
+            writtenAt:          snapshot.writtenAt,
+            events:             snapshot.events.filter { keep.contains($0.calendarKey) },
+            todayColorHex:      snapshot.todayColorHex,
+            textColorHex:       snapshot.textColorHex,
+            backgroundColorHex: snapshot.backgroundColorHex,
+            lineColorHex:       snapshot.lineColorHex,
+            primaryColorHex:    snapshot.primaryColorHex,
+            accentColorHex:     snapshot.accentColorHex,
+            language:           snapshot.language
+        )
     }
 }
 

CalendarrWidgets/CalendarrWidgets.swift

@@ -47,7 +47,7 @@ struct TodayWidget: Widget {
     let kind: String = "TodayWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             TodayWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.today_title", "system"))
@@ -62,7 +62,7 @@ struct TwoDaysWidget: Widget {
     let kind: String = "TwoDaysWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             TwoDaysWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.days_title", "system"))
@@ -77,7 +77,7 @@ struct ThreeDaysWidget: Widget {
     let kind: String = "ThreeDaysWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             ThreeDaysWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.threedays_title", "system"))
@@ -92,7 +92,7 @@ struct ThisWeekWidget: Widget {
     let kind: String = "ThisWeekWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             ThisWeekWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.thisweek_title", "system"))
@@ -107,7 +107,7 @@ struct TwoWeeksWidget: Widget {
     let kind: String = "TwoWeeksWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             TwoWeeksWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.twoweeks_title", "system"))
@@ -122,7 +122,7 @@ struct UpcomingWidget: Widget {
     let kind: String = "UpcomingWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             UpcomingWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.upcoming_title", "system"))
@@ -137,7 +137,7 @@ struct UpNextWidget: Widget {
     let kind: String = "UpNextWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             UpNextWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.upnext_title", "system"))
@@ -152,7 +152,7 @@ struct CalendarDayWidget: Widget {
     let kind: String = "CalendarDayWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             CalendarDayWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.calday_title", "system"))
@@ -167,7 +167,7 @@ struct TwoMonthWidget: Widget {
     let kind: String = "TwoMonthWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             TwoMonthWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.twomonth_title", "system"))
@@ -182,7 +182,7 @@ struct NowNextEventsWidget: Widget {
     let kind: String = "NowNextEventsWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             NowNextWidgetView(entry: entry).calendarrChrome(entry.snapshot)
         }
         .configurationDisplayName(WidgetL10n.t("widget.display.nownext_title", "system"))
@@ -197,7 +197,7 @@ struct LockScreenWidget: Widget {
     let kind: String = "LockScreenWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             LockScreenWidgetView(entry: entry)
                 .containerBackground(for: .widget) { Color.clear }
                 .environment(\.locale, WidgetL10n.locale(entry.snapshot?.language ?? "system"))
@@ -214,7 +214,7 @@ struct LockScreenCountWidget: Widget {
     let kind: String = "LockScreenCountWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             LockScreenCountWidgetView(entry: entry)
                 .containerBackground(for: .widget) { Color.clear }
                 .environment(\.locale, WidgetL10n.locale(entry.snapshot?.language ?? "system"))
@@ -231,7 +231,7 @@ struct LockScreenCountdownWidget: Widget {
     let kind: String = "LockScreenCountdownWidget"
 
     var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: CalendarrTimelineProvider()) { entry in
+        AppIntentConfiguration(kind: kind, intent: CalendarSelectionIntent.self, provider: CalendarrTimelineProvider()) { entry in
             LockScreenCountdownWidgetView(entry: entry)
                 .containerBackground(for: .widget) { Color.clear }
                 .environment(\.locale, WidgetL10n.locale(entry.snapshot?.language ?? "system"))

Shared/WidgetData.swift

@@ -8,6 +8,14 @@ import WidgetKit
 /// and the App Group ID registered in the Apple Developer Portal.
 let widgetAppGroupID = "group.com.scarriffleservices.calendarr"
 
+/// Lightweight calendar descriptor stored alongside the event cache so the
+/// widget configuration intent can offer calendar options without a network call.
+struct WidgetCalendar: Codable, Identifiable, Hashable {
+    let id: String       // calendarKey ("source-calendarId")
+    let name: String
+    let colorHex: String
+}
+
 /// Lightweight event representation that lives inside the widget cache.
 /// We strip everything the widget doesn't need (notes, calendar IDs, URLs).
 struct WidgetEvent: Codable, Hashable, Identifiable {
@@ -18,6 +26,27 @@ struct WidgetEvent: Codable, Hashable, Identifiable {
     let isAllDay: Bool
     let colorHex: String
     let location: String
+    let calendarKey: String   // used for per-calendar filtering in widget config
+
+    init(id: String, title: String, start: Date, end: Date,
+         isAllDay: Bool, colorHex: String, location: String, calendarKey: String) {
+        self.id = id; self.title = title; self.start = start; self.end = end
+        self.isAllDay = isAllDay; self.colorHex = colorHex
+        self.location = location; self.calendarKey = calendarKey
+    }
+
+    // Backward-compatible decoder: old caches have no calendarKey field.
+    init(from decoder: Decoder) throws {
+        let c = try decoder.container(keyedBy: CodingKeys.self)
+        id         = try c.decode(String.self, forKey: .id)
+        title      = try c.decode(String.self, forKey: .title)
+        start      = try c.decode(Date.self,   forKey: .start)
+        end        = try c.decode(Date.self,   forKey: .end)
+        isAllDay   = try c.decode(Bool.self,   forKey: .isAllDay)
+        colorHex   = try c.decode(String.self, forKey: .colorHex)
+        location   = try c.decode(String.self, forKey: .location)
+        calendarKey = try c.decodeIfPresent(String.self, forKey: .calendarKey) ?? ""
+    }
 }
 
 /// Snapshot blob the app writes to the App-Group container and the widget reads.
@@ -76,6 +105,7 @@ struct WidgetSnapshot: Codable {
 
 enum WidgetStore {
     private static let cacheFilename     = "widget-cache.json"
+    private static let calendarsFilename = "widget-calendars.json"
 
     private static var containerURL: URL? {
         FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: widgetAppGroupID)
@@ -85,6 +115,10 @@ enum WidgetStore {
         containerURL?.appendingPathComponent(cacheFilename)
     }
 
+    private static var calendarsURL: URL? {
+        containerURL?.appendingPathComponent(calendarsFilename)
+    }
+
     /// Called by the app whenever the event cache changes.
     static func write(_ snapshot: WidgetSnapshot) {
         guard let url = cacheURL else { return }
@@ -103,6 +137,21 @@ enum WidgetStore {
         return try? decoder.decode(WidgetSnapshot.self, from: data)
     }
 
+    /// Write the list of available calendars so the widget intent can offer
+    /// calendar options for filtering without a network call.
+    static func writeCalendars(_ calendars: [WidgetCalendar]) {
+        guard let url = calendarsURL else { return }
+        if let data = try? JSONEncoder().encode(calendars) {
+            try? data.write(to: url, options: .atomic)
+        }
+    }
+
+    /// Read the calendar list written by the main app.
+    static func readCalendars() -> [WidgetCalendar] {
+        guard let url = calendarsURL, let data = try? Data(contentsOf: url) else { return [] }
+        return (try? JSONDecoder().decode([WidgetCalendar].self, from: data)) ?? []
+    }
+
     /// Rewrite the existing snapshot with the latest colour / language values
     /// from UserDefaults. Used when the user tweaks an appearance setting and
     /// we want the widgets to refresh immediately, without needing a new event