docs: log KC-13 (recurrence redesign + classic Matrix)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

KisaniCal/ISSUES.md

@@ -399,3 +399,33 @@ Files: `TaskItem.swift`, `CalendarView.swift`.
   with Clear) whenever a recurrence is selected.
 
 Files: `TaskItem.swift`, `CalendarView.swift`, `TodayView.swift`, `MatrixView.swift`.
+
+---
+
+## KC-13 — Recurrence redesign: single occurrence, new sections, classic Matrix
+
+**Status:** In Progress (implemented & build-verified, pending device build)
+**Reported by:** User
+**Area:** Tasks / Calendar / Matrix
+
+### Description
+The first recurrence pass used calendar-expansion in lists — a daily task showed
+in Today, Tomorrow, Next 7 Days, and Upcoming simultaneously (planning noise).
+Should behave like TickTick: one task, one next occurrence, one source of truth.
+
+### Fix
+- **Single active occurrence (P1/P5):** `nextActiveOccurrence` + `activeRows` — each
+  recurring task contributes ONE row (its next un-completed occurrence). Completing
+  rolls forward; no future duplicates in lists. Calendar grid still shows per-date.
+- **Sections (P2):** replaced Today / Next 3 Days / Upcoming with
+  **Today / Tomorrow / Next 7 Days / Later** (`todayTasks`/`tomorrowTasks`/
+  `next7DaysTasks`/`laterTasks`; `UpcomingSection` gained a `title`).
+- **Icons (P3):** ⏰ reminder + 🔁 recurring on the right of each row; fixed the
+  hardcoded "Annual" label to show the real frequency.
+- **Matrix (P4):** classic Eisenhower — importance is user-assigned (row), urgency is
+  derived from the deadline (within `urgentWindowDays` = 7). `displayQuadrant` +
+  `matrixTasks` group by the computed quadrant; recurring rolls forward. Chosen over
+  the fully-auto "far = Q4" model so the user keeps control of importance.
+
+Files: `TaskItem.swift`, `TodayView.swift`, `MatrixView.swift`.
+Commits: `b4e36db` (lists + icons), `2f1bc5d` (Matrix).