fix(web): preserve coalesced tile error logs

apps/web/src/server/routes/dashboard.test.ts

@@ -389,6 +389,62 @@ describe("dashboard API route", () => {
     ]);
   });
 
+  test("logs coalesced metadata when shared tile requests fail", async () => {
+    const cache = createDashboardTileCache();
+    let rejectLoad: ((error: Error) => void) | undefined;
+    const load = vi.fn(() =>
+      new Promise<never>((_resolve, reject) => {
+        rejectLoad = reject;
+      })
+    );
+
+    const first = cache.resolve("tile-a", 30_000, 1_000, load);
+    const second = cache.resolve("tile-a", 30_000, 1_000, load);
+
+    await Promise.resolve();
+    expect(load).toHaveBeenCalledTimes(1);
+
+    rejectLoad?.(new TypeError("upstream failed"));
+    await expect(first).rejects.toThrow("upstream failed");
+    await expect(second).rejects.toMatchObject({
+      cache: "miss",
+      coalesced: true,
+      cause: expect.any(TypeError),
+    });
+  });
+
+  test("logs coalesced metadata for failed tile cache resolution", async () => {
+    const logs: DashboardTileResolutionLogEvent[] = [];
+    const tile = { kind: "service", groupId: "essentials", id: "vaultwarden" } as const;
+
+    await expect(
+      loadDashboardTileResponse(tile, {
+        logTileResolution: (event) => logs.push(event),
+        refreshSeedDocument: true,
+        seedIfEmpty: true,
+        tileCache: {
+          async resolve() {
+            throw {
+              cache: "miss",
+              cause: new TypeError("coalesced cache failed"),
+              coalesced: true,
+            };
+          },
+        },
+      }),
+    ).rejects.toThrow("coalesced cache failed");
+
+    expect(logs).toEqual([
+      expect.objectContaining({
+        cache: "miss",
+        coalesced: true,
+        errorCategory: "TypeError",
+        status: "error",
+        tileKey: dashboardTileCacheKey(tile),
+      }),
+    ]);
+  });
+
   test("logs error categories for failed tile cache resolution", async () => {
     const logs: DashboardTileResolutionLogEvent[] = [];
     const tile = { kind: "service", groupId: "essentials", id: "vaultwarden" } as const;