docs: update CHANGELOG.md for v1.2.2

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,24 @@
 
 All notable changes to HouseHoldKeeper are documented in this file.
 
+## [1.2.2] - 2026-04-03
+
+### Added
+- Smart task delete: hard-delete for unused tasks, soft-delete (isActive) for tasks with completion history
+- Reworked frequency picker with shortcut chips (daily/weekly/biweekly/monthly) and freeform "Every N unit" interface
+- Anytime task completion — checkboxes always enabled on all calendar days
+- Recurring task pre-population on all applicable days within interval window
+- "Demnächst" (upcoming) section in calendar day view for pre-populated tasks
+- Muted visual styling (0.55 opacity) for pre-populated not-yet-due tasks
+- Today-based nextDueDate recalculation when completing tasks on non-due days
+
+### Changed
+- Drift schema upgraded to v3 with isActive BoolColumn on Tasks table
+- Calendar providers rewritten with interval-window pre-population logic
+
+### Removed
+- Orphaned v1.0 daily plan files (daily_plan_providers.dart, daily_plan_task_row.dart, progress_card.dart)
+
 ## [1.1.5] - 2026-03-17
 
 ### Fixed