feat: instrument analysis

frontend/src/hooks/useApi.ts

@@ -200,6 +200,17 @@ export const useSetWatchlistSaxoQuoteLink = () => {
   })
 }
 
+// Links an Instrument Analysis instrument (backend/config/instruments.json — a separate
+// catalog from instruments_watchlist above) to a Saxo quote symbol, so its chart/indicators/
+// wavelets are Saxo-sourced instead of yfinance. InstrumentDashboard.tsx doesn't use React
+// Query for its own data (plain axios + useState), so this mutation carries no
+// invalidateQueries — the caller re-fetches the instrument list/snapshot itself on success.
+export const useSetInstrumentSaxoLink = () =>
+  useMutation({
+    mutationFn: ({ instrumentId, saxoSymbol }: { instrumentId: string; saxoSymbol: string | null }) =>
+      api.put(`/instruments/${encodeURIComponent(instrumentId)}/saxo-link`, { saxo_symbol: saxoSymbol }).then(r => r.data),
+  })
+
 // Free-form display name — no longer tied to yfinance's long_name lookup, since an
 // instrument can now be entirely Saxo-sourced.
 export const useRenameWatchlistInstrument = () => {