test(e2e): mock prices-history + tighten Polymarket defaults (MMQA-1800)

CI surfaced two pre-existing leaks the *.polymarket.com wildcard had
been masking. Both are fixed here so the wildcard removal can ship.

- POLYMARKET_COMPLETE_MOCKS: add prices-history mock returning
  { history: [] }. Predict happy-path specs (open-position, cash-out,
  claim-positions, geo-restriction) were making live calls to
  clob.polymarket.com/prices-history; the chart consumer in
  PolymarketProvider treats a non-array history as empty so this
  empty payload is safe.

- trending-api-mocks: add events/1 (rich Bitcoin event payload
  matching the existing pagination response) and prices-history
  (empty history). trending-feed.spec.ts taps prediction row 1, which
  navigates to a detail screen that calls these endpoints; without
  the mocks the detail screen renders empty and the wallet's React
  tree throws.

- defaults/polymarket-apis: drop the events/{id} and
  events?parent_event_id matchers. They were too aggressive — empty
  payloads cause the wallet to crash in detail screens. Detail-level
  calls should be covered by the spec's testSpecificMock, not by
  generic defaults.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: chrisleewilcox

tests/api-mocking/mock-responses/defaults/polymarket-apis.ts

@@ -38,19 +38,6 @@ export const POLYMARKET_API_MOCKS = {
       responseCode: 200,
       response: { events: [] },
     },
-    // gamma-api: single event lookup — consumer accesses `data?.markets`
-    {
-      urlEndpoint: /^https:\/\/gamma-api\.polymarket\.com\/events\/[^/?]+$/,
-      responseCode: 200,
-      response: { markets: [] },
-    },
-    // gamma-api: parent event lookup
-    {
-      urlEndpoint:
-        /^https:\/\/gamma-api\.polymarket\.com\/events(\?.*parent_event_id=.*)?$/,
-      responseCode: 200,
-      response: [],
-    },
     // gamma-api: markets list
     {
       urlEndpoint: /^https:\/\/gamma-api\.polymarket\.com\/markets(\?.*)?$/,

tests/api-mocking/mock-responses/polymarket/polymarket-mocks.ts

@@ -656,6 +656,24 @@ export const POLYMARKET_FEE_RATE_MOCKS = async (mockServer: Mockttp) => {
     });
 };
 
+/**
+ * Mock for Polymarket CLOB prices-history API
+ * Returns an empty history series — sufficient for predict happy-path specs
+ * that render the chart (consumer treats non-array history as empty).
+ */
+export const POLYMARKET_PRICES_HISTORY_MOCKS = async (mockServer: Mockttp) => {
+  await mockServer
+    .forGet('/proxy')
+    .matching((request) => {
+      const url = new URL(request.url).searchParams.get('url');
+      return Boolean(url?.includes('clob.polymarket.com/prices-history'));
+    })
+    .asPriority(PRIORITY.BASE)
+    .thenReply(200, JSON.stringify({ history: [] }), {
+      'content-type': 'application/json',
+    });
+};
+
 /**
  * Mock for Polymarket CLOB order book API
  * Returns order book data for specific token IDs with correct market mapping
@@ -2184,6 +2202,7 @@ export const POLYMARKET_COMPLETE_MOCKS = async (mockServer: Mockttp) => {
   await POLYMARKET_EVENT_DETAILS_MOCKS(mockServer);
   await POLYMARKET_ORDER_BOOK_MOCKS(mockServer);
   await POLYMARKET_PRICES_MOCKS(mockServer); // Mock for CLOB prices API
+  await POLYMARKET_PRICES_HISTORY_MOCKS(mockServer); // Mock for CLOB prices-history API (chart series)
   await POLYMARKET_FEE_RATE_MOCKS(mockServer);
   await POLYMARKET_MARKET_FEEDS_MOCKS(mockServer);
   await POLYMARKET_CLOB_AUTH_MOCKS(mockServer);

tests/api-mocking/mock-responses/trending-api-mocks.ts

@@ -161,6 +161,52 @@ export const TRENDING_API_MOCKS: MockEventsObject = {
       },
       priority: 1000,
     },
+    {
+      // Event details fetched when user taps a prediction row in the trending feed.
+      // Returns the same Bitcoin event payload as /events/pagination so the detail
+      // screen renders without crashing.
+      urlEndpoint: /https:\/\/gamma-api\.polymarket\.com\/events\/1(\?.*)?$/,
+      responseCode: 200,
+      response: {
+        id: '1',
+        title: 'Will Bitcoin hit $100k?',
+        slug: 'bitcoin-100k',
+        icon: 'https://polymarket.com/icon.png',
+        description: 'Bitcoin price prediction',
+        startDate: '2024-01-01T00:00:00Z',
+        endDate: '2024-12-31T23:59:59Z',
+        markets: [
+          {
+            conditionId: '123',
+            question: 'Will Bitcoin hit $100k?',
+            status: 'open',
+            outcomes: '["Yes", "No"]',
+            outcomePrices: '["0.6", "0.4"]',
+            clobTokenIds: '["1", "2"]',
+            volumeNum: 1000000,
+            liquidity: 500000,
+            orderPriceMinTickSize: 0.01,
+            active: true,
+            closed: false,
+            sportsMarketType: 'moneyline',
+            groupItemTitle: 'Bitcoin',
+          },
+        ],
+        tags: [{ label: 'Crypto', slug: 'crypto' }],
+        volume: 1000000,
+        liquidity: 500000,
+      },
+      priority: 1000,
+    },
+    {
+      // Prices-history (chart series) fetched on prediction detail render.
+      // Empty history is safe — consumer (PolymarketProvider) returns [] when
+      // history is not a non-empty array.
+      urlEndpoint: /https:\/\/clob\.polymarket\.com\/prices-history.*/,
+      responseCode: 200,
+      response: { history: [] },
+      priority: 1000,
+    },
     {
       urlEndpoint: /\/exchange.*/, // Hyperliquid
       responseCode: 200,