feat: update frontend API types, client and formatters

3 files changed, 80 insertions, 8 deletions

diff --git a/frontend/lib/api.ts b/frontend/lib/api.ts
index 2635af5..a584241 100644
--- a/frontend/lib/api.ts
+++ b/frontend/lib/api.ts
@@ -1,4 +1,4 @@
-import type { FilingsResponse, FinancialsResponse, HistoryPoint, InsidersResponse, MarketIndex, NewsResponse, RatiosResponse, SearchResult, TickerOverview, ValuationResponse, WatchlistResponse } from "@/types/api";
+import type { FilingsResponse, FinancialsResponse, HistoryPoint, InsidersResponse, MarketIndex, NewsResponse, RatiosResponse, SearchResult, TickerOverview, ValuationResponse, WaccResponse, WatchlistResponse } from "@/types/api";
 
 const API_BASE = (process.env.NEXT_PUBLIC_API_BASE_URL || "").trim().replace(/\/$/, "");
 
@@ -59,6 +59,11 @@ export const api = {
       `/api/tickers/${encodeURIComponent(symbol)}/valuation`
     );
   },
+  wacc(symbol: string) {
+    return request<WaccResponse>(
+      `/api/tickers/${encodeURIComponent(symbol)}/wacc`
+    );
+  },
   ratios(symbol: string) {
     return request<RatiosResponse>(
       `/api/tickers/${encodeURIComponent(symbol)}/ratios`
diff --git a/frontend/lib/format.ts b/frontend/lib/format.ts
index 6a1fcc2..e4bae13 100644
--- a/frontend/lib/format.ts
+++ b/frontend/lib/format.ts
@@ -1,6 +1,22 @@
-export function fmtCurrency(value?: number | null, decimals = 2): string {
+const CURRENCY_SYMBOLS: Record<string, string> = {
+  USD: "$",
+  CAD: "C$",
+  GBP: "£",
+  EUR: "€",
+  JPY: "¥",
+  AUD: "A$",
+  CHF: "CHF ",
+  CNY: "CN¥",
+  HKD: "HK$",
+};
+
+function currencySymbol(currency = "USD"): string {
+  return CURRENCY_SYMBOLS[currency.toUpperCase()] || `${currency.toUpperCase()} `;
+}
+
+export function fmtCurrency(value?: number | null, decimals = 2, currency = "USD"): string {
   if (value === null || value === undefined || Number.isNaN(value)) return "-";
-  return `$${value.toLocaleString(undefined, { maximumFractionDigits: decimals, minimumFractionDigits: decimals })}`;
+  return `${currencySymbol(currency)}${value.toLocaleString(undefined, { maximumFractionDigits: decimals, minimumFractionDigits: decimals })}`;
 }
 
 export function fmtNumber(value?: number | null, decimals = 2): string {
@@ -8,14 +24,15 @@ export function fmtNumber(value?: number | null, decimals = 2): string {
   return value.toLocaleString(undefined, { maximumFractionDigits: decimals, minimumFractionDigits: decimals });
 }
 
-export function fmtLarge(value?: number | null): string {
+export function fmtLarge(value?: number | null, currency = "USD"): string {
   if (value === null || value === undefined || Number.isNaN(value)) return "-";
   const abs = Math.abs(value);
   const sign = value < 0 ? "-" : "";
-  if (abs >= 1e12) return `${sign}$${(abs / 1e12).toFixed(2)}T`;
-  if (abs >= 1e9) return `${sign}$${(abs / 1e9).toFixed(2)}B`;
-  if (abs >= 1e6) return `${sign}$${(abs / 1e6).toFixed(1)}M`;
-  return `${sign}$${abs.toLocaleString(undefined, { maximumFractionDigits: 0 })}`;
+  const symbol = currencySymbol(currency);
+  if (abs >= 1e12) return `${sign}${symbol}${(abs / 1e12).toFixed(2)}T`;
+  if (abs >= 1e9) return `${sign}${symbol}${(abs / 1e9).toFixed(2)}B`;
+  if (abs >= 1e6) return `${sign}${symbol}${(abs / 1e6).toFixed(1)}M`;
+  return `${sign}${symbol}${abs.toLocaleString(undefined, { maximumFractionDigits: 0 })}`;
 }
 
 export function fmtPct(value?: number | null, decimals = 2, signed = false): string {
diff --git a/frontend/types/api.ts b/frontend/types/api.ts
index 8143d56..3b2cd70 100644
--- a/frontend/types/api.ts
+++ b/frontend/types/api.ts
@@ -25,6 +25,8 @@ export type Signal = {
 };
 
 export type TickerOverview = {
+  currency: string;
+  currency_warning: string | null;
   profile: {
     symbol: string;
     name: string;
@@ -115,12 +117,33 @@ export type FinancialStatement = {
 };
 
 export type FinancialsResponse = {
+  currency: string;
+  currency_warning: string | null;
   period: "annual" | "quarterly";
   income: FinancialStatement;
   balance: FinancialStatement;
   cash_flow: FinancialStatement;
 };
 
+export type AdvancedDcfInputs = {
+  base_revenue: number;
+  revenue_growth: number[];
+  ebitda_margin: number[];
+  dna_pct_revenue: number[];
+  capex_pct_revenue: number[];
+  nwc_chg_pct_delta_rev: number[];
+  tax_rate: number[];
+  wacc: number;
+  terminal_growth: number;
+  projection_years: number;
+};
+
+export type SensitivityMatrix = {
+  wacc: number[];
+  terminal_growth: number[];
+  implied_prices: (number | null)[][];
+};
+
 export type DcfResult = {
   available: boolean;
   error?: string | null;
@@ -137,6 +160,8 @@ export type DcfResult = {
   wacc: number;
   terminal_growth: number;
   projection_years: number;
+  sensitivity?: SensitivityMatrix | null;
+  advanced_inputs?: AdvancedDcfInputs | null;
 };
 
 export type MultipleResult = {
@@ -149,6 +174,8 @@ export type MultipleResult = {
 };
 
 export type ValuationResponse = {
+  currency: string;
+  currency_warning: string | null;
   symbol: string;
   current_price?: number | null;
   shares_outstanding?: number | null;
@@ -158,6 +185,27 @@ export type ValuationResponse = {
   price_to_book: MultipleResult;
 };
 
+export type WaccResponse = {
+  currency: string;
+  currency_warning: string | null;
+  symbol: string;
+  available: boolean;
+  wacc?: number | null;
+  cost_of_equity?: number | null;
+  after_tax_cost_of_debt?: number | null;
+  risk_free_rate: number;
+  beta: number;
+  equity_risk_premium: number;
+  cost_of_debt: number;
+  tax_rate: number;
+  market_cap?: number | null;
+  total_debt?: number | null;
+  cash?: number | null;
+  net_debt?: number | null;
+  equity_weight?: number | null;
+  debt_weight?: number | null;
+};
+
 export type RatioPoint = {
   value: number | null;
   spark: (number | null)[];
@@ -230,6 +278,8 @@ export type FilingsResponse = {
 };
 
 export type RatiosResponse = {
+  currency: string;
+  currency_warning: string | null;
   pe_ttm: RatioPoint;
   ev_ebitda: RatioPoint;
   gross_margin: RatioPoint;