Improve frontend test framework (#22824)

* add error allowlist file for error collector

* add error collector for console + page + request errors

* wire error collector into frigateApp fixture

* add self-tests for error collector fixture

* gate strict error mode on E2E_STRICT_ERRORS=1

* triage pre-existing errors and seed allowlist

* add mockEmpty/mockError/mockDelay helpers for state-driven tests

* add self-tests for mock override helpers

* add mobile affordance helpers to BasePage

* add lint script for banned spec patterns and @mobile rule

* apply prettier fixes to new e2e files

* rewrite export.spec.ts

* clean up

* move export spec rewrite and bugfix to separate branch

web/package.json

@@ -7,7 +7,8 @@
     "dev": "vite --host",
     "postinstall": "patch-package",
     "build": "tsc && vite build --base=/BASE_PATH/",
-    "lint": "eslint --ext .jsx,.js,.tsx,.ts --ignore-path .gitignore .",
+    "lint": "eslint --ext .jsx,.js,.tsx,.ts --ignore-path .gitignore . && npm run e2e:lint",
+    "e2e:lint": "node e2e/scripts/lint-specs.mjs",
     "lint:fix": "eslint --ext .jsx,.js,.tsx,.ts --ignore-path .gitignore --fix .",
     "preview": "vite preview",
     "prettier:write": "prettier -u -w --ignore-path .gitignore \"*.{ts,tsx,js,jsx,css,html}\"",