[Agent] Embed iframe hardcoded light theme

Agent brief

Category: mobile | Severity: medium | Effort: S

Problem

Embed iframe hardcodes light theme; ignores parent dark mode and project theme settings.

Files

• src/app/embed/[projectSlug]/client.tsx
• Embed layout CSS

Acceptance criteria

• Embed respects ?theme=dark|light|system query param
• Default follows project or system preference

Suggested approach

Pass theme from widget script config; apply dark class on root.