WebID profile document missing foaf:PersonalProfileDocument, primaryTopic, maker #299

Problem

JSS-generated WebID profiles describe the WebID subject (#me) but don't describe the profile document itself. Canonical Solid profiles (see timbl's, and pivot's template) declare:

<>  a foaf:PersonalProfileDocument ;
    foaf:maker <#me> ;
    foaf:primaryTopic <#me> .

Without these, apps that discover a user by following a link to /profile/card don't know the document describes a person — they expect to follow foaf:primaryTopic from the document URI to reach the WebID.

Current JSS output

{
  "@id": "https://example.com/alice/profile/card#me",
  "@type": ["foaf:Person", "schema:Person"],
  "foaf:name": "Alice",
  "mainEntityOfPage": "https://example.com/alice/profile/card",
  ...
}

Only describes #me. No statement about the document itself.

Expected output

{
  "@graph": [
    {
      "@id": "https://example.com/alice/profile/card",
      "@type": "foaf:PersonalProfileDocument",
      "foaf:maker": {"@id": "https://example.com/alice/profile/card#me"},
      "foaf:primaryTopic": {"@id": "https://example.com/alice/profile/card#me"}
    },
    {
      "@id": "https://example.com/alice/profile/card#me",
      "@type": ["foaf:Person", "schema:Person"],
      ...
    }
  ]
}

Reference

• Timbl's profile: prof:card a foaf:PersonalProfileDocument; foaf:maker <#me>; foaf:primaryTopic <#me>.
• Pivot template: same pattern

Files affected

• src/webid/profile.js — generateProfileJsonLd()