Feature: 2×2 Prioritization Matrix

[dansj1]

Feature Request: 2×2 Prioritization Matrix

Summary

Add a fully interactive 2×2 prioritization matrix (Eisenhower-style) that lets users visually organize tasks across four customizable quadrants using drag-and-drop.

Motivation

Prioritization matrices are one of the most popular productivity frameworks. Users currently have tags, projects, and areas to organize tasks, but lack a visual spatial tool for relative prioritization. A built-in matrix view would complement the existing task management workflow and help users make better decisions about what to work on next.

Proposed Solution

Backend:

• Two new tables: matrices (name, axis labels, optional project scope) and task_matrices (task ↔ matrix placement with quadrant index and position)
• Full REST API: CRUD matrices, assign/move/remove tasks, browse available tasks by project/area/tag, bulk placement queries for dot indicators
• Validation layer with clear error messages

Frontend:

• Interactive board with @dnd-kit drag-and-drop (pointer + touch support)
• DragOverlay for smooth cross-quadrant task moves with optimistic updates
• Create/edit modal with an Eisenhower preset and cross-layout axis inputs
• Universal task browser sidebar (filter by project, area, or tag)
• Colored QuadrantDot indicators on task cards throughout the app
• Sidebar navigation entry
• Full i18n support (en, es, fr, de, it, pt, ja, ko, zh, el)

Tests (128 total):

• Backend: validation (33), model (13), integration (45)
• Frontend: constants (9), hook helpers (9), API service (19)

Additional Context

I have an implementation ready as a PR. This was built with AI assistance (GitHub Copilot / Claude).