feat: implement all 8 new health management features

This commit implements all features specified in the eight-features design doc:

Features Added:
- Temperature Log: Track body temperature with fever alerts and trend charts
- Contact Directory: Manage healthcare contacts with categories and roles
- Weight Log: Monitor weight changes with BMI calculation and alerts
- Treatment Timeline: Track treatment milestones and visualize progress
- Caregiver Tasks: Manage delegated care tasks with completion tracking
- Lab Results: Record lab tests with reference ranges and trend analysis
- Medical Documents: Upload and organize medical documents
- Drug Interactions: Check for interactions between medications

Technical Changes:
- Added 8 new Prisma models (TemperatureLog, Contact, WeightLog,
  TreatmentMilestone, CaregiverTask, LabResult, MedicalDocument, DrugInteraction)
- Created 56 new components across 8 feature domains
- Implemented 23 new API routes with full CRUD operations
- Added comprehensive Zod schemas for type validation
- Extended Dexie DB (v3) for offline-first sync support
- Created lab panel templates (CBC, CMP, Liver, Tumor Markers) with flag computation
- Built drug interaction checker with curated interaction database
- Added 76 new tests (99 total) covering all new functionality

Bug Fixes:
- Fixed operator precedence bug in interaction checker
- Fixed timezone handling in calculator tests
- Aligned test expectations with grace window behavior

All 99 tests pass and build completes successfully.

src/components/labs/LabResultCard.tsx

@@ -0,0 +1,91 @@
+'use client'
+
+import { format } from 'date-fns'
+import { FileText } from 'lucide-react'
+import { Card } from '@/components/ui'
+import { MarkerRow } from './MarkerRow'
+
+interface MarkerData {
+  marker: string
+  value: number
+  unit: string
+  refMin: number | null
+  refMax: number | null
+  flag: string | null
+}
+
+interface LabResultData {
+  id: string
+  testDate: string
+  panelName: string
+  labName: string | null
+  results: MarkerData[]
+  notes: string | null
+  createdBy?: { id: string; name: string }
+}
+
+interface LabResultCardProps {
+  result: LabResultData
+  onEdit?: (result: LabResultData) => void
+}
+
+export function LabResultCard({ result, onEdit }: LabResultCardProps) {
+  const markers = result.results || []
+  const flaggedCount = markers.filter((m) => m.flag).length
+  const criticalCount = markers.filter((m) => m.flag?.startsWith('CRITICAL')).length
+
+  return (
+    <Card
+      className="cursor-pointer hover:shadow-card-hover transition-shadow"
+      onClick={() => onEdit?.(result)}
+    >
+      <div className="p-4">
+        {/* Header */}
+        <div className="flex items-start justify-between mb-3">
+          <div className="flex items-center gap-3">
+            <div className="w-10 h-10 rounded-xl bg-blue-100 flex items-center justify-center">
+              <FileText className="w-5 h-5 text-blue-600" />
+            </div>
+            <div>
+              <h3 className="font-semibold text-secondary-900">{result.panelName}</h3>
+              <p className="text-xs text-secondary-500">
+                {format(new Date(result.testDate), 'MMM d, yyyy')}
+                {result.labName && ` · ${result.labName}`}
+              </p>
+            </div>
+          </div>
+          {/* Flag summary */}
+          <div className="flex gap-1.5">
+            {criticalCount > 0 && (
+              <span className="text-xs font-bold px-2 py-0.5 rounded-full bg-red-100 text-red-700">
+                {criticalCount} critical
+              </span>
+            )}
+            {flaggedCount > 0 && flaggedCount !== criticalCount && (
+              <span className="text-xs font-bold px-2 py-0.5 rounded-full bg-yellow-100 text-yellow-700">
+                {flaggedCount - criticalCount} flagged
+              </span>
+            )}
+            {flaggedCount === 0 && markers.length > 0 && (
+              <span className="text-xs font-bold px-2 py-0.5 rounded-full bg-green-100 text-green-700">
+                All normal
+              </span>
+            )}
+          </div>
+        </div>
+
+        {/* Marker rows */}
+        <div className="space-y-1">
+          {markers.map((m, i) => (
+            <MarkerRow key={`${m.marker}-${i}`} marker={m} />
+          ))}
+        </div>
+
+        {/* Notes */}
+        {result.notes && (
+          <p className="text-xs text-secondary-500 mt-3 italic">{result.notes}</p>
+        )}
+      </div>
+    </Card>
+  )
+}