v0.0.7

New Features

• Move prompt envelope, sigil refs, variables, and #ai static media into aidialog core; bump context image budget to 768px (#17)
• Resize images for LLM context and pick one image per output, via shared output_parts/merge_media helpers (#13)
• Move join_out/output_from_msg to fastcore.nbio, add render_md output-to-markdown renderer, and add %nbrun line magic (#12)
• Support nbdev meta directives: export= in add_msg/mk_message, [export] in previews, and directive attrs in XML views (#11)
• url_mime: use server Content-Type as fallback before byte sniffing (#10)