feat: Notes tab (notes + shopping lists), fix 7-day forecast layout, fix screensaver dismiss

app/api/notes/route.ts

@@ -0,0 +1,76 @@
+export const dynamic = 'force-dynamic'
+import { NextResponse } from 'next/server'
+import * as fs from 'fs'
+
+const NOTES_PATH = '/tmp/tablet-notes.json'
+
+interface Note {
+  id: string
+  type: 'note' | 'shopping'
+  title: string
+  items?: { id: string; text: string; done: boolean }[]
+  text?: string
+  color: string
+  createdAt: string
+  updatedAt: string
+}
+
+function loadNotes(): Note[] {
+  try {
+    if (fs.existsSync(NOTES_PATH)) {
+      return JSON.parse(fs.readFileSync(NOTES_PATH, 'utf-8'))
+    }
+  } catch {}
+  return []
+}
+
+function saveNotes(notes: Note[]) {
+  fs.writeFileSync(NOTES_PATH, JSON.stringify(notes, null, 2))
+}
+
+export async function GET() {
+  return NextResponse.json({ notes: loadNotes() })
+}
+
+export async function POST(req: Request) {
+  const body = await req.json()
+  const notes = loadNotes()
+  const note: Note = {
+    id: Date.now().toString(36) + Math.random().toString(36).slice(2, 6),
+    type: body.type || 'note',
+    title: body.title || '',
+    items: body.type === 'shopping' ? [] : undefined,
+    text: body.type === 'note' ? '' : undefined,
+    color: body.color || '#6366f1',
+    createdAt: new Date().toISOString(),
+    updatedAt: new Date().toISOString(),
+  }
+  notes.unshift(note)
+  saveNotes(notes)
+  return NextResponse.json({ note })
+}
+
+export async function PUT(req: Request) {
+  const body = await req.json()
+  const { id, ...updates } = body
+  if (!id) return NextResponse.json({ error: 'id required' }, { status: 400 })
+
+  const notes = loadNotes()
+  const idx = notes.findIndex(n => n.id === id)
+  if (idx === -1) return NextResponse.json({ error: 'not found' }, { status: 404 })
+
+  notes[idx] = { ...notes[idx], ...updates, updatedAt: new Date().toISOString() }
+  saveNotes(notes)
+  return NextResponse.json({ note: notes[idx] })
+}
+
+export async function DELETE(req: Request) {
+  const { searchParams } = new URL(req.url)
+  const id = searchParams.get('id')
+  if (!id) return NextResponse.json({ error: 'id required' }, { status: 400 })
+
+  const notes = loadNotes()
+  const filtered = notes.filter(n => n.id !== id)
+  saveNotes(filtered)
+  return NextResponse.json({ success: true })
+}