Epic: Cross-platform syndication depth (LinkedIn targeting, reconnect, verify)

[Adron]

Summary

Connected Accounts and compose-time cross-post toggles work. The remaining gap is LinkedIn per-destination targeting — which CLAUDE.md still records as blocked.

Status correction

CLAUDE.md lists "LinkedIn per-page posting targets" as not built and once recorded /api/linkedin/targets as 401-walled. Live, 2026-09-15:

GET /api/linkedin/targets -> 200 {"targets":[]}

Bearer-reachable; empty because the test account has no LinkedIn pages. Buildable against the empty state.

Unimplemented endpoints

Method	Path
GET	/api/linkedin/targets
GET/PUT	/api/linkedin/posting-targets
POST	/api/linkedin/sync-pages
POST	/api/user/identities/verify
POST	/api/auth/{provider}/link

Compose fields not sent

POST /api/messages accepts linkedInTargets[] ({kind:"personal"} or {kind:"orgPage", pageId}), the superseded singular linkedInTarget, and linkedInLinkAsFirstComment. PostMessageAsync sends only the crossPostToLinkedIn boolean.

Repo conventions to follow

• Service: one partial class InterlinedApiClient file per domain in InterlinedList/Services/.
• Wire types in InterlinedList/Models/ matching real API JSON.
• ViewModel per view in InterlinedList/ViewModels/ (CommunityToolkit.Mvvm ObservableObject + [RelayCommand]).
• View is a self-contained UserControl in InterlinedList/Views/ that news up its own VM from AppServices.Session.
• Strata tokens only — no colors/fonts/radii outside Resources/Palette.xaml + Theme.*.xaml.
• Read-after-write for any mutating endpoint whose response envelope has not been live-verified.