Count hand-valued assets into the wealth figure

A wealth figure that ignores the house is not a wealth figure. Assets
without a market feed - a house, a car, a private loan - are now added
by hand on the Wealth page with a stated value, a currency and the day
the estimate was made; a negative value records a liability. They are
registry entities in assets.finance like everything else, join the
per-currency totals immediately, and a currency held only in an asset
earns its own line.

web/src/api.ts

@@ -27,6 +27,17 @@ export interface Instrument {
   quote?: string;
   quoted_at?: string;
 }
+// Asset is a possession valued by hand: a house, a car, anything without a
+// market feed. value is what the owner states it is worth and valued_at the
+// day that estimate was made. A negative value records a liability.
+export interface Asset {
+  id: string;
+  name: string;
+  kind?: string;
+  currency: string;
+  value: string;
+  valued_at: string;
+}
 // Investment is the broker-native leg of a fact. Cash movement always stays in
 // Facts.amount, so a position-only event carries a zero amount. Quantity is an
 // exact signed decimal, not money: negative removes from the holding.
@@ -107,6 +118,7 @@ export interface Dataset {
   tags: Tag[];
   merchants: Merchant[];
   instruments: Instrument[];
+  assets: Asset[];
   transactions: Transaction[];
 }
 export interface Connection {
@@ -384,13 +396,27 @@ export interface WealthTotal {
   currency: string;
   cash: string;
   positions: string;
+  // assets is the stated value of every hand-valued asset in this currency,
+  // and wealth is cash, positions and assets together.
+  assets: string;
   wealth: string;
   unpriced: number;
 }
+// WealthAsset is one hand-valued asset as the journal records it: the value is
+// stated, never quoted, and carries the day it was stated.
+export interface WealthAsset {
+  asset_id: string;
+  name: string;
+  kind?: string;
+  currency: string;
+  value: string;
+  valued_at: string;
+}
 // Wealth is a reconciliation report computed from the journal rather than the
 // analytics index, so it can be checked against a bank or broker's own screen.
 export interface Wealth {
   accounts: WealthAccount[];
+  assets: WealthAsset[];
   totals: WealthTotal[];
 }
 export class APIError extends Error {
@@ -461,6 +487,7 @@ export function normalizeState(state: State): State {
     "tags",
     "merchants",
     "instruments",
+    "assets",
     "transactions",
   ] as const) {
     if (!(key in state.data))