test: increase playwright expect timeout for worker imports

Increased expect timeout from 5s to 15s to accommodate worker thread
encoding imports (~10s). This prevents test timeouts during startup.

Author: ThomasK33

playwright.config.ts

@@ -6,7 +6,7 @@ export default defineConfig({
   testDir: "./tests/e2e",
   timeout: 120_000,
   expect: {
-    timeout: 5_000,
+    timeout: 15_000, // Increased to allow worker thread encoding import (~10s)
   },
   fullyParallel: true,
   forbidOnly: isCI,