Replace all eight footer legal links from .md to .html extensions in mywebdav-app.js and create corresponding HTML documents for privacy policy, data processing agreement, terms of service, cookie policy, security policy, compliance statement, data portability & deletion policy, and contact & complaint mechanism, each with placeholder content and back navigation.
Replace every occurrence of "RBox" with "MyWebdav" in source files, configuration,
legal documents, UI components, and test fixtures. This includes renaming the
`RBoxApp` class to `MyWebdavApp` in the JavaScript component, updating the
TOTP issuer from "RBox" to "MyWebdav" in the auth router, changing the
application description in the argument parser, and updating all user-facing
strings in HTML templates, legal policies, and the manifest file. The
`.env.example` default for `TOTP_ISSUER` is also updated accordingly.
