Move the rest of the app to remote hosting — prod still falls back to localhost for every undeployed remote

Only the client-facing surfaces (Corpus Builder + Augment-from-DB) were deployed as hosted remotes; the other 12 micro-frontends are hardcoded to http://localhost:3XXX in the production shell build, so augment.didi.sh tries to fetch them from the visitor's own machine at boot — they fail, and on some networks hang on a TCP timeout. This was a deliberate shortcut to get client collaboration live and defer the big refactor. Now the rest of the app needs to graduate to remote hosting.