Add "Blue sky thinking" section for parked ideas New landing page explaining it's a holding area for explored-but-uncommitted ideas (risk / complexity-vs-reward / uncertain demand), with Remote Image Archiving moved under it. Added a sidebar section and back-links.
Add Remote Image Archiving (parked idea) page Records the idea of downloading remote https:// email images at import for privacy/archival/offline, and — prominently — the SSRF danger that keeps it parked (may never ship). Cross-linked from the Email Rendering & Images page.