The legacy `providers` block is deleted whole when its last entry migrates
to `provider`. Nothing covered the case where other legacy entries remain,
so a regression there would silently drop unrelated providers. Adds the
case to both the web server and VS Code parity suites.
Derive the effective OpenCode config layer (custom > project > user) from
provider sources and send it on PUT /api/provider so project/custom edits
update that layer instead of creating a global user override. Resolve
OPENCODE_CONFIG at call time and add UI/web/VS Code coverage for scoped
upserts.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
Require an API key or {env:VAR} on client and server, add edit/prefill for
existing custom providers, save auth before config, and surface incomplete
auth plus disconnect after partial failures. Add VS Code parity tests and
drop the unused allProvidersConnected locale key.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
Bohdan Triapitsyn