Add company overview skeleton and cache

lib/server/prices.test.ts

@@ -0,0 +1,64 @@
+import { afterEach, beforeEach, describe, expect, it, mock } from 'bun:test';
+import { __pricesInternals, getPriceHistory, getQuote } from './prices';
+
+describe('price caching', () => {
+  const originalFetch = globalThis.fetch;
+
+  beforeEach(() => {
+    __pricesInternals.resetCaches();
+  });
+
+  afterEach(() => {
+    globalThis.fetch = originalFetch;
+    __pricesInternals.resetCaches();
+  });
+
+  it('reuses the cached quote within the ttl window', async () => {
+    const fetchMock = mock(async () => Response.json({
+      chart: {
+        result: [
+          {
+            meta: {
+              regularMarketPrice: 123.45
+            }
+          }
+        ]
+      }
+    })) as unknown as typeof fetch;
+    globalThis.fetch = fetchMock;
+
+    const first = await getQuote('MSFT');
+    const second = await getQuote('MSFT');
+
+    expect(first).toBe(123.45);
+    expect(second).toBe(123.45);
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+  });
+
+  it('reuses cached price history within the ttl window', async () => {
+    const fetchMock = mock(async () => Response.json({
+      chart: {
+        result: [
+          {
+            timestamp: [1735689600, 1736294400],
+            indicators: {
+              quote: [
+                {
+                  close: [100, 105]
+                }
+              ]
+            }
+          }
+        ]
+      }
+    })) as unknown as typeof fetch;
+    globalThis.fetch = fetchMock;
+
+    const first = await getPriceHistory('MSFT');
+    const second = await getPriceHistory('MSFT');
+
+    expect(first).toHaveLength(2);
+    expect(second).toEqual(first);
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+  });
+});