supabase / supabase / 25689120523

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feat(studio): Fly.io deprecation banner (#45778)

## Summary

Adding an in-dashboard banner for the Fly.io May 31 suspension. Banner
targets users on a Fly project (or with a Fly project in their
currently-selected org) and surfaces a per-project breakdown of what's
affected in a dialog. Detection is self-correcting: as soon as the user
migrates off Fly, the banner disappears with no follow-up.

<img width="557" height="502" alt="Screenshot 2026-05-11 at 5 08 22 PM"
src="https://github.com/user-attachments/assets/7bafb712-3490-4555-9667-66e9909f1b1a"
/>
<img width="1675" height="536" alt="Screenshot 2026-05-11 at 3 55 06 PM"
src="https://github.com/user-attachments/assets/6c1bf9d1-4dcc-4aac-a679-2ed477d2ed1c"
/>


## Changes

- **Detection hook** (`useFlyDeprecationProjects`): reads only from
already-cached data — `useSelectedProjectQuery` for the current project,
plus `useOrgProjectsInfiniteQuery` scoped to the selected org. Zero
cross-org fan-out: worst case is one paginated query per session (the
same one the project list page already makes).
- **Banner component** (`FlyDeprecationBanner.tsx`): mounted in
`AppBannerWrapper`. Dynamic title (primaries / branches / both), dialog
lists affected projects with org name, numbered migration steps, links
to backup/restore CLI + Dashboard backup + branching docs. List
truncates to 5 entries with "…and N more." tail when more are affected.
- **Telemetry**: `fly_deprecation_banner_exposed` and
`fly_deprecation_banner_dismissed` events emitted via `useTrack`
(auto-injects project + org groups). Properties: `primaryCount`,
`branchCount`. CTA click tracking intentionally omitted — migration
outcome is measured via warehouse `cloud_provider = 'FLY'` decay.
- **LocalStorage**: dated dismissal key `FLY_DEPRECATION_2026_05_31`;
orphan `FLY_POSTGRES_DEPRECATION_WARNING` from PR #33510 removed in the
same change so users who dismissed the Feb 2025 banner still see this
one.
- **Support contact**: email `success@supabas... (continued)

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