feat(33-01): add market_prices, community_prices tables and currency columns

- Add marketPrices table with unique(globalItemId, market, currency) constraint
- Add communityPrices table with unique(globalItemId, userId, sourceType) constraint
- Add priceCurrency column to items table (default EUR)
- Add foundPriceCents, foundPriceCurrency, foundPriceDate to threadCandidates
- Add Zod schemas for market price upsert and community price submission
- Export new types from shared/types.ts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/db/schema.ts

@@ -1,4 +1,5 @@
 import {
+	boolean,
 	doublePrecision,
 	integer,
 	pgTable,
@@ -56,6 +57,7 @@ export const items = pgTable("items", {
 	quantity: integer("quantity").notNull().default(1),
 	globalItemId: integer("global_item_id").references(() => globalItems.id),
 	purchasePriceCents: integer("purchase_price_cents"),
+	priceCurrency: text("price_currency").default("EUR"),
 	brand: text("brand"),
 	dominantColor: text("dominant_color"),
 	cropZoom: doublePrecision("crop_zoom"),
@@ -108,6 +110,9 @@ export const threadCandidates = pgTable("thread_candidates", {
 	cons: text("cons"),
 	sortOrder: doublePrecision("sort_order").notNull().default(0),
 	globalItemId: integer("global_item_id").references(() => globalItems.id),
+	foundPriceCents: integer("found_price_cents"),
+	foundPriceCurrency: text("found_price_currency"),
+	foundPriceDate: timestamp("found_price_date"),
 	createdAt: timestamp("created_at").defaultNow().notNull(),
 	updatedAt: timestamp("updated_at").defaultNow().notNull(),
 });
@@ -268,3 +273,43 @@ export const oauthTokens = pgTable("oauth_tokens", {
 	refreshExpiresAt: timestamp("refresh_expires_at").notNull(),
 	createdAt: timestamp("created_at").defaultNow().notNull(),
 });
+
+// ── Market Prices ──────────────────────────────────────────────────
+
+export const marketPrices = pgTable(
+	"market_prices",
+	{
+		id: serial("id").primaryKey(),
+		globalItemId: integer("global_item_id")
+			.notNull()
+			.references(() => globalItems.id, { onDelete: "cascade" }),
+		market: text("market").notNull(),
+		currency: text("currency").notNull(),
+		priceCents: integer("price_cents").notNull(),
+		source: text("source"),
+		createdAt: timestamp("created_at").defaultNow().notNull(),
+	},
+	(table) => [unique().on(table.globalItemId, table.market, table.currency)],
+);
+
+// ── Community Prices ───────────────────────────────────────────────
+
+export const communityPrices = pgTable(
+	"community_prices",
+	{
+		id: serial("id").primaryKey(),
+		globalItemId: integer("global_item_id")
+			.notNull()
+			.references(() => globalItems.id, { onDelete: "cascade" }),
+		userId: integer("user_id")
+			.notNull()
+			.references(() => users.id),
+		market: text("market").notNull(),
+		currency: text("currency").notNull(),
+		priceCents: integer("price_cents").notNull(),
+		priceDate: timestamp("price_date"),
+		sourceType: text("source_type").notNull(),
+		createdAt: timestamp("created_at").defaultNow().notNull(),
+	},
+	(table) => [unique().on(table.globalItemId, table.userId, table.sourceType)],
+);