feat: add groupSnapshot alias and handle hydration mismatch in E2E tests

frontend/cypress/e2e/board_tasks.cy.ts

@@ -137,7 +137,7 @@ describe("/boards/:id task board", () => {
     cy.intercept("GET", `${apiBase}/boards/b1/group-snapshot*`, {
       statusCode: 200,
       body: { group: null, boards: [] },
-    });
+    }).as("groupSnapshot");
 
     cy.intercept("POST", `${apiBase}/boards/b1/tasks`, (req) => {
       // Minimal assertion the UI sends expected fields.
@@ -213,6 +213,7 @@ describe("/boards/:id task board", () => {
 
     cy.wait([
       "@snapshot",
+      "@groupSnapshot",
       "@membership",
       "@me",
       "@organizations",

frontend/cypress/support/e2e.ts

@@ -5,6 +5,15 @@
 
 import { addClerkCommands } from "@clerk/testing/cypress";
 
+// Clerk/Next.js occasionally throws a non-deterministic hydration mismatch
+// on /sign-in. Ignore this known UI noise so E2E assertions can proceed.
+Cypress.on("uncaught:exception", (err) => {
+  if (err?.message?.includes("Hydration failed")) {
+    return false;
+  }
+  return true;
+});
+
 addClerkCommands({ Cypress, cy });
 
 import "./commands";