Legal pages — draft banner removed

The destructive Alert that read "This content is a draft and requires professional legal review before publication" has been removed from the privacy, terms, impressum, DPA, withdrawal, and cookies pages.

The pages still need lawyer review before Phase 1 — that's tracked in ops/launch-checklist.md. But a public-facing legal page that announces "this isn't really our policy" creates more DSGVO transparency risk than it solves: a visitor reading the impressum cannot rely on it, which is exactly what the impressum is for. The banner went up as a self-imposed warning during drafting and outlived its usefulness.

What changed:

• LegalPageShell no longer accepts a draftBanner prop and no longer renders the Alert component.
• Each of the six legal pages stopped passing the prop.
• The legal.draft_banner translation key was removed from EN, DE, and HE message files.

Lawyer review of the underlying content remains the gating item. Until that's done, do not announce these pages publicly.