Initial commit: Next Step health management app

A calm, reliable app to help manage appointments, medications, and notes
for chemo patients and their families.

Features:
- Today dashboard with next appointment and medications due
- Medication tracking with multiple schedule types (fixed times, interval, weekdays, PRN)
- One-tap dose logging with 5-minute undo window
- Questions for doctor tracking
- Family sharing with workspace model and invite links
- Offline-first with IndexedDB and sync
- Docker Compose deployment with Tailscale Funnel support

Tech stack:
- Next.js 14 (App Router) + TypeScript + Tailwind CSS
- PostgreSQL + Prisma
- Argon2 password hashing + session cookies
- Dexie.js for IndexedDB

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/login/page.tsx

@@ -0,0 +1,99 @@
+'use client'
+
+import { useState } from 'react'
+import { useRouter } from 'next/navigation'
+import Link from 'next/link'
+import { Heart } from 'lucide-react'
+import { Button, Input, Card, showToast } from '@/components/ui'
+
+export default function LoginPage() {
+  const router = useRouter()
+  const [email, setEmail] = useState('')
+  const [password, setPassword] = useState('')
+  const [loading, setLoading] = useState(false)
+  const [error, setError] = useState('')
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault()
+    setError('')
+    setLoading(true)
+
+    try {
+      const response = await fetch('/api/auth/login', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ email, password }),
+      })
+
+      const data = await response.json()
+
+      if (!response.ok) {
+        setError(data.error || 'Login failed')
+        return
+      }
+
+      showToast('Welcome back!', 'success')
+      router.push('/today')
+      router.refresh()
+    } catch {
+      setError('Something went wrong. Please try again.')
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  return (
+    <div className="min-h-screen bg-background flex flex-col items-center justify-center p-4">
+      <div className="w-full max-w-sm">
+        {/* Logo */}
+        <div className="text-center mb-8">
+          <div className="w-16 h-16 bg-primary-500 rounded-2xl flex items-center justify-center mx-auto mb-4">
+            <Heart className="w-8 h-8 text-white" />
+          </div>
+          <h1 className="text-2xl font-bold text-secondary-900">Next Step</h1>
+          <p className="text-secondary-500 mt-1">Health management made simple</p>
+        </div>
+
+        <Card className="mb-6">
+          <form onSubmit={handleSubmit} className="space-y-4">
+            <Input
+              label="Email"
+              type="email"
+              value={email}
+              onChange={(e) => setEmail(e.target.value)}
+              placeholder="you@example.com"
+              required
+              autoComplete="email"
+            />
+            <Input
+              label="Password"
+              type="password"
+              value={password}
+              onChange={(e) => setPassword(e.target.value)}
+              placeholder="••••••••"
+              required
+              autoComplete="current-password"
+            />
+
+            {error && (
+              <p className="text-sm text-red-600 bg-red-50 px-3 py-2 rounded-button">
+                {error}
+              </p>
+            )}
+
+            <Button type="submit" fullWidth loading={loading}>
+              Sign In
+            </Button>
+          </form>
+        </Card>
+
+        <p className="text-center text-secondary-500">
+          Don't have an account?{' '}
+          <Link href="/register" className="text-primary-600 font-medium hover:text-primary-700">
+            Create one
+          </Link>
+        </p>
+      </div>
+    </div>
+  )
+}