feat: Enhance Notifications feature with accessibility improvements and test remediation

- Added aria-label attributes to buttons in Notifications component for better accessibility.
- Updated Notifications tests to use new button interactions and ensure proper functionality.
- Refactored notifications payload tests to mock API responses and validate payload transformations.
- Improved error handling and feedback in notification provider tests.
- Adjusted Telegram notification provider tests to streamline edit interactions.

frontend/package.json

@@ -61,6 +61,7 @@
     "@testing-library/jest-dom": "^6.9.1",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",
+    "@types/eslint-plugin-jsx-a11y": "^6.10.1",
     "@types/node": "^25.4.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -69,6 +70,7 @@
     "@vitejs/plugin-react": "^5.1.4",
     "@vitest/coverage-istanbul": "^4.0.18",
     "@vitest/coverage-v8": "^4.0.18",
+    "@vitest/eslint-plugin": "^1.6.10",
     "@vitest/ui": "^4.0.18",
     "autoprefixer": "^10.4.27",
     "eslint": "^9.39.3 <10.0.0",
@@ -85,7 +87,6 @@
     "eslint-plugin-testing-library": "^7.16.0",
     "eslint-plugin-unicorn": "^63.0.0",
     "eslint-plugin-unused-imports": "^4.4.1",
-    "@vitest/eslint-plugin": "^1.6.10",
     "jsdom": "28.1.0",
     "knip": "^5.86.0",
     "postcss": "^8.5.8",
@@ -94,6 +95,6 @@
     "typescript-eslint": "^8.57.0",
     "vite": "^7.3.1",
     "vitest": "^4.0.18",
-    "@types/eslint-plugin-jsx-a11y": "^6.10.1"
+    "zod-validation-error": "^4.0.2"
   }
 }