Matrix (KC-21): the Eisenhower Matrix is now a computed view of tasks.
Importance = Priority (High = top row), urgency = deadline proximity, so
tasks auto-place into Q1–Q4. Added a persisted `matrixOverride` so a manual
drag pins the task and syncs its Priority to that row (top → High, moving
down demotes High → Medium) and never gets forced back; editing Priority,
due date, or the editor clears the override to re-place live. New tasks get
KisaniCal priority defaults (birthday/domain/annual/exam/subscription → High,
workout → Medium). AddTaskSheet drops the manual quadrant picker for a
Priority menu (pick Priority + Date only).
Also includes in-progress Progress Dots widget work (day/week/month/custom
event modes, App-Group anchor, recurrence-aware spans).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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