Rename Xcode project to honeyDue and fix all bundle IDs

- Rename iosApp.xcodeproj → honeyDue.xcodeproj
- Rename Casera schemes → HoneyDue, HoneyDueExtension, HoneyDueUITests
- Split bundle IDs per-config: Debug=com.tt.honeyDue.dev, Release=com.tt.honeyDue
- Split app groups per-config: Debug=group.com.tt.honeyDue.dev, Release=group.com.tt.honeyDue
- Fix com.t-t. typo → com.tt. in test bundle IDs
- Add APP_GROUP_IDENTIFIER build setting with variable substitution in entitlements
- Replace all hardcoded app group strings in Swift with Info.plist runtime reads
- Remove stale PRODUCT_BUNDLE_IDENTIFIER from Config.xcconfig
- Update test plan container references

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

iosApp/HoneyDue/AppIntent.swift

@@ -147,7 +147,9 @@ struct OpenTaskIntent: AppIntent {
 final class WidgetActionManager {
     static let shared = WidgetActionManager()
 
-    private let appGroupIdentifier = "group.com.tt.honeyDue.HoneyDueDev"
+    private let appGroupIdentifier: String = {
+        Bundle.main.infoDictionary?["AppGroupIdentifier"] as? String ?? "group.com.tt.honeyDue.dev"
+    }()
     private let pendingTasksFileName = "widget_pending_tasks.json"
     private let tokenKey = "widget_auth_token"
     private let dirtyFlagKey = "widget_tasks_dirty"