test(e2e): axe-core's WCAG A + AA rules over every page and the player (chromium only); contrast stays with the visual check

frontend/playwright.config.ts

@@ -17,6 +17,9 @@ import { defineConfig, devices } from "@playwright/test";
 
 const BASE_URL = process.env.PW_BASE_URL || "http://127.0.0.1:8080";
 const STORAGE_STATE = "e2e/.auth/state.json";
+// The axe scan reads the DOM and the accessibility tree, which the engines build alike: one engine
+// answers for all, so the other projects leave it out instead of tripling its time.
+const CHROMIUM_ONLY = /a11y\.spec\.ts/;
 
 export default defineConfig({
   testDir: "./e2e",
@@ -54,11 +57,13 @@ export default defineConfig({
     {
       name: "webkit",
       use: { ...devices["Desktop Safari"], storageState: STORAGE_STATE },
+      testIgnore: CHROMIUM_ONLY,
       dependencies: ["setup"],
     },
     {
       name: "ipad",
       use: { ...devices["iPad (gen 7) landscape"], storageState: STORAGE_STATE },
+      testIgnore: CHROMIUM_ONLY,
       dependencies: ["setup"],
     },
     // The speed baseline (e2e/speed.measure.ts): readings, not tests. Only when PW_SPEED is set —