fix: 4 bugs — MSK today events, settings scroll, note dates, persistent notes volume

- calendar API: today/week ranges use Moscow time (UTC+3) instead of UTC — previously today events did not appear until 03:00 MSK
- settings tab: add -webkit-overflow-scrolling: touch + touchAction pan-y for tablet scroll
- NotesTab: add date picker (pinDate) in editor header + date badge in list
- home: pinnedNotes now filters by pinDate (today or future), falls back to latest
- notes/auth: storage moved from /tmp to /data (falls back to /tmp if /data missing)
- deploy workflow: mount /opt/digital-home/smart-home-tablet-data:/data so notes survive redeploys

app/api/notes/route.ts

@@ -2,7 +2,8 @@ export const dynamic = 'force-dynamic'
 import { NextResponse } from 'next/server'
 import * as fs from 'fs'
 
-const NOTES_PATH = '/tmp/tablet-notes.json'
+const DATA_DIR = fs.existsSync('/data') ? '/data' : '/tmp'
+const NOTES_PATH = `${DATA_DIR}/tablet-notes.json`
 
 interface Note {
   id: string