Replaces the localStorage-only LLM settings with a persisted catalogue
backed by /api/v1/admin/llm-configurations. The Settings → LLM screen
now has two cards:
- "Saved configurations" — full CRUD against the server. Each row shows
provider/model/secret/published per-1M-token costs. Add wizard
auto-fills costs from the curated catalog. One-click "Import local"
button promotes any pre-existing localStorage settings into a server
row, then clears the local store.
- "Active LLM (this session)" — the existing LLMProvidersSettingsCard,
scoped down to "what does the Assistant use right now" (still
localStorage; per-operator).
Spend (30d) tile in the configurations card header reads
/api/v1/ai/llm/usage/summary and surfaces total cost / requests /
tokens. First visible cost roll-up in the admin UI.
New module app/lib/arcadia/llm-configs.ts: typed CRUD client,
catalog lookup, computeCostCents helper (mirrors the server's
LlmConfiguration.compute_cost_cents/3), and getUsageSummary.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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