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nextstep-features/DESIGN.md

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+# Next Step - New Feature Design Document
+
+## Overview
+This document outlines 5 new features designed to help families supporting a loved one through chemotherapy treatment.
+
+## Feature 1: Enhanced Symptom Tracking with Trends & Insights
+
+### Problem
+Current symptom tracking is basic - users can log symptoms but have limited visibility into patterns, trends, or correlations.
+
+### Solution
+- **Detailed Symptom Logging**: Add duration, triggers
+- **Trend Visualization**: 7/14/30-day charts with filtering
+- **Pattern Detection**: Highlight when symptoms spike
+- **Symptom Report**: Exportable PDF report for doctor visits
+
+## Feature 2: Caregiver Coordination (Handoff Notes & Task Assignments)
+
+### Problem
+Families struggle to coordinate care, especially with multiple caregivers.
+
+### Solution
+- **Handoff Notes**: Quick shift-change notes
+- **Task Assignments**: Assign tasks to specific caregivers
+- **Caregiver Activity**: See who's doing what
+
+## Feature 3: Treatment Milestone Tracker
+
+### Problem
+Chemo is a long journey - families need encouragement and a sense of progress.
+
+### Solution
+- **Treatment Plan**: Define treatment schedule (e.g., "12 cycles")
+- **Visual Progress**: Progress bar showing % complete
+- **Milestone Cards**: Celebrate wins
+
+## Feature 4: Quick Access Emergency Widget
+
+### Problem
+Emergency info exists but requires navigation. In a real emergency, every second counts.
+
+### Solution
+- **Emergency Button**: Always-visible floating button
+- **One-Tap Calling**: Direct dial for emergency contacts
+- **Emergency Mode**: Simplified, high-contrast view
+
+## Feature 5: Calendar Integration (iCal/ICS Export)
+
+### Problem
+Families use multiple calendars. Appointments in Next Step aren't visible in their regular calendar apps.
+
+### Solution
+- **Subscribe URL**: Personal ICS feed URL
+- **Export Appointments**: Generate .ics files
+- **Share Calendar**: Family members can subscribe
+
+## Implementation Priority
+
+1. **Treatment Milestone Tracker** - High morale impact
+2. **Enhanced Symptom Tracking** - Builds on existing feature
+3. **Caregiver Coordination** - High practical value
+4. **Quick Access Emergency Widget** - Safety critical
+5. **Calendar Integration** - Lower urgency