chore(web): reduce the app to a redirect shell, drop the browser extension
app.supermemory.ai now forwards everything to the console: plugin, OAuth and invite paths get an immediate 308 with the query intact, everything else shows a short notice first. Removes the browser extension workspace.
chore(web): give the moved notice a proper design
Hostnames become the headline, one primary action, a draining line for the countdown, DM Sans and the dot-grid backdrop from the brand.
chore(docs): point docs and README at the console, drop stale sections
Docs and both READMEs now link to console.supermemory.ai for API keys. Removed the company-brain docs tab with a redirect, and trimmed the README app section.
chore(web): give the redirect five seconds
- Header pill with trial days left (Autumn-first, org metadata fallback)
- Brain home: Your Company Brain timeline card (trial strip, milestones from /brain/overview) promoted to top-right
- Trial copy in CB onboarding Slack step and docked header
- Brain home now reads the new /brain/overview endpoint (drops the dead /brain/connections fetch)
Fixes ENG-1142
