[Copy] Correct Zero-State Pluralization in Daily Cadence Widget

• Labels: good first issue, ui, difficulty:beginner, area:dashboard
• Target File: src/features/dashboard/components/daily-cadence-widget.tsx
• Estimated Time: 5–10 minutes
• Difficulty: Level 1 (Beginner)

Why This Matters

When a user completes all daily tasks, the widget summary text should read grammatically clean copy ("0 tasks remaining today") rather than awkward singular/plural edge cases.

Current Behavior

The cadence widget displays ${count} tasks remaining even when count is 1.

Requested Change

Update the text string to use clean singular/plural formatting:

const taskLabel = count === 1 ? 'task' : 'tasks';

Acceptance Criteria

• Pluralization logic updated in src/features/dashboard/components/daily-cadence-widget.tsx.
• Displays "1 task remaining" when count is 1, and "X tasks remaining" otherwise.

Verification

npm run lint
npx tsc --noEmit

Contributor Notes

Simple 1-line string format adjustment.

🎨 Level 2: Core Refinements (10–15 Minutes) — UI, a11y, JSDoc

Open src/features/dashboard/components/daily-cadence-widget.tsx and find the cadence summary text. Check the count-based label against the two acceptance cases, then run npm run lint and npx tsc --noEmit. Done means the widget displays “1 task remaining” for one and “X tasks remaining” for other counts.