* fix(server): align provider catalog diagnostics
* fix(server): preserve catalog profile models
* refactor: unify provider catalog discovery under AgentClient.fetchCatalog
Remove listModels/listModes from AgentClient and fetchModels/fetchModes
from ProviderDefinition. All provider runtime discovery now flows through
a single fetchCatalog(options) => ProviderCatalog API.
ProviderSnapshotManager.listModels/listModes remain as cached snapshot
conveniences only. Provider implementations (acp, codex, opencode, pi,
claude, mock) updated accordingly; agent-manager default model resolution
now calls fetchCatalog.
Reshape step toward issue pi-model-list-empty.
* refactor: remove remaining provider listModels/listModes runtime API residue
Migrate remaining AgentClient/provider-client implementations and tests to
fetchCatalog. Remove obsolete ListModelsOptions/ListModesOptions interfaces.
Update ProviderSnapshotManager.getProviderDiagnostic to materialize clients
via ensureClient(provider, definition) so diagnostics self-heal the settings
sheet instead of failing when providerClients[provider] is absent.
Allowed to remain: ProviderSnapshotManager.listModels/listModes as cached
snapshot readers; protocol/client legacy list_provider_models names; unrelated
local helper in create-agent-mode.
* test(server): repair test clients after fetchCatalog refactor
- Restore TestAgentClient.fetchCatalog with proper model list and resumeSession.
- Restore NativeArchiveRecordingClient and EnvProbeAgentClient removed during refactor.
- Fix ResumeCaptureClient.fetchCatalog and resumeSession.
- Fix stream-coalescing TestAgentClient.fetchCatalog shape and isAvailable.
- Mock accessible OpenCode provider in full-access mode tests so fetchCatalog does not throw.
* refactor(app): update stable discovered models ref directly during render
