prepare app for public app store distribution

- rebrand from 습관 트래커 to 해빗랩 across templates, manifest, service worker
- add HTTPS redirect middleware for reverse-proxied deployments
- add public landing page (/) and privacy policy page with real data
  handling disclosures
- add in-app account deletion (Apple review requirement)
- add Android TWA Digital Asset Links support (/.well-known/assetlinks.json)
- add SFTP deployment script for the Synology-hosted server

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/templates/history.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}기록 · 습관 트래커{% endblock %}
+{% block title %}기록 · 해빗랩{% endblock %}
 {% block nav_history %}active{% endblock %}
 {% block shell_class %} wide{% endblock %}
 {% block content %}