[DCT-Berinyuy]

Summary

Fixes two problems reported by Play testers:

1. Image uploads stuck on the spinner. Listing photos were uploaded at full camera size. On 2026-10-09 they averaged about 8.5 MB, and the largest was 11.7 MB. Uploads of that size stall on mobile data, and the old code had no timeout, so the spinner never stopped. When these photos are shown full-size in the feed, they also pushed the Supabase free-plan cached egress quota to 115% (5.74 / 5 GB).
2. Edit-listing keyboard flicker / white screen. My Books and Listing details opened the editor with context.push('/sell', extra: listing). /sell is a route inside the bottom-nav shell, and pushing it from a root-level screen duplicates the shell navigator's page keys. When the keyboard opens, the router rebuilds and the form is remounted. The field loses focus, so the keyboard closes, and sometimes the screen goes blank. A widget test reproduced this as the navigator assertion !keyReservation.contains(key).

Closes #

Changes

• sell_viewmodel.dart: picked photos from the gallery or camera are resized to at most 1600 px at JPEG quality 70. These are the same settings ID verification already uses.
• supabase_storage_data_source.dart:
  • Book and profile uploads time out after 60 s.
  • TimeoutException, SocketException and ClientException now map to clear "timed out" or "no connection" messages.
  • The book upload uses the injected client instead of Supabase.instance.
• listing_card.dart and listing_image_carousel.dart: images load through cached_network_image, a new dependency, which caches them on disk. Cards decode at 600 px.
• router.dart: new root-level /edit-listing route (it redirects to /my-books if there is no listing) and /new-listing route.
  • Listing details and My Books now use these routes.
  • The FAB's /sell push from inside the shell was tested and is unaffected, so it is unchanged.

Test plan

• flutter analyze: no new issues. It still exits 1 on 3 existing issues in supabase_auth_data_source.dart and main.dart, which this PR does not touch.
• flutter test: 316 tests passed.
  • New: test/features/listings/data/datasources/supabase_storage_data_source_test.dart covers upload success, the timeout, and DNS/socket failures.
  • New: test/config/root_form_routes_test.dart checks that the form keeps focus and is not remounted when the keyboard opens.
• cargo fmt, cargo clippy, and cargo test pass (Rust core changes): N/A
• New migrations are idempotent and tested against a local or branch database: N/A
• Not yet tested on a device. Smoke test on Android: upload a camera photo, edit a listing, and type in each field.

Checklist

• Targets dev, not main
• No secrets, keys, or personal data in code, logs, or screenshots
• User input is validated; new tables have RLS policies (no new tables)
• User-facing strings added to both EN and FR ARB files. The new upload error messages are English-only in the data layer, like the existing "Upload failed" messages.
• Docs updated if behavior changed (route comments)

Screenshots

N/A

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Project	Deployment	Actions	Updated
book-bridge	Ready	Preview	Oct 10, 2026 11:55pm UTC