Update application ports to 3050 and enhance Playwright tests with WebGL mock

.claude/settings.local.json

@@ -0,0 +1,9 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(npm test:*)",
+      "Bash(npm run:*)",
+      "Bash(npx playwright:*)"
+    ]
+  }
+}