# [FEATURE] Reorder task list by urgency

## Description
List past due tasks, then tasks with a specific time today, then 12am (all-day) tasks today, then future tasks.

## User Story
As a user, I want tasks sorted by urgency tiers so I see what needs attention first.

## Technical Context
- Affects: `internal/handlers/handlers.go` — sorting logic before template render
- Requires distinguishing "has specific time" vs "all-day" (midnight/00:00)
- Todoist API may return all-day tasks with time set to 00:00:00

## Test Strategy

### Unit Test (Red)
**File:** `internal/handlers/handlers_test.go`

```go
func TestSortTasksByUrgency(t *testing.T) {
    tasks := []Task{
        {Name: "future", DueDate: tomorrow},
        {Name: "overdue", DueDate: yesterday},
        {Name: "today-timed", DueDate: todayAt(14, 30)},
        {Name: "today-allday", DueDate: todayAt(0, 0)},
    }

    sorted := SortTasksByUrgency(tasks)

    // Expected order: overdue, today-timed, today-allday, future
    assert.Equal(t, "overdue", sorted[0].Name)
    assert.Equal(t, "today-timed", sorted[1].Name)
    assert.Equal(t, "today-allday", sorted[2].Name)
    assert.Equal(t, "future", sorted[3].Name)
}
```

## Proposed Approach

1. Define sort buckets with priority:
   - Priority 0: Overdue (due_date < today)
   - Priority 1: Today with specific time (due_date == today && time != 00:00)
   - Priority 2: Today all-day (due_date == today && time == 00:00)
   - Priority 3: Future (due_date > today)
2. Within each bucket, sort by due_date ascending
3. Implement stable sort to preserve original order within equal items

## Traps to Avoid
- **Timezone handling:** Ensure consistent timezone (user's local or UTC?) for date comparisons
- **Null due dates:** Decide where tasks with no due date should appear (suggest: after future tasks)
- **All-day detection:** Todoist may use different conventions; verify API response format

## Affected Components
- `internal/handlers/handlers.go`
- `internal/handlers/handlers_test.go`

## Definition of Done
- [ ] Tasks sorted in specified order
- [ ] Overdue tasks appear first
- [ ] Timed tasks today before all-day tasks today
- [ ] Future tasks appear last
- [ ] Null due date tasks handled gracefully
- [ ] Unit tests cover all buckets and edge cases