Add an inline "Verbindung testen" button to the Neuer/Bearbeiten provider
dialogs so users can test a connection with the currently entered values
before saving.
Backend:
- New endpoint POST /providers/test-connection that accepts an ad-hoc provider
config (apiType, baseUrl, model, optional apiToken, optional providerId) in
the request body and runs a one-shot test via the existing callProvider
logic. When apiToken is empty and providerId is given, it falls back to the
stored token of that provider (edit case). Returns { ok, message }; the token
is never returned or leaked (existing redactSecrets still applies to errors).
- Defined ProviderTestConnectionInput schema + path in openapi.yaml and ran
codegen for Zod schemas and the React client.
Frontend (artifacts/skillguard/src/pages/admin.tsx):
- Add dialog: "Verbindung testen" button (disabled until Base URL + Token set
or while testing) with loading spinner and an inline green success / red
error result box. Result resets when the dialog closes.
- Edit dialog: same inline test; empty token field falls back to the stored
token via providerId. Result resets on open/close.
- The existing per-card "Verbindung testen" button is unchanged.
Verification: typecheck passes for api-server and skillguard; curl tested the
new endpoint for success-path (fetch error surfaced), empty-token, and invalid
body (400) cases. Token not present in any response.
Deviations: none.
Replit-Task-Id: 4f77293f-468c-496a-ab05-1f10e7bf8137
543fd96afd