refactor: align frontend with FSD architecture

package.json

@@ -10,8 +10,12 @@
     "apigen": "orval",
     "typecheck": "vue-tsc -b",
     "lint": "eslint .",
+    "lint:fsd": "steiger src",
+    "lint:fsd:json": "steiger src --reporter json",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
+    "check": "bun run lint && bun run lint:fsd && bun run test:unit && bun run build",
+    "check:full": "bun run check && bun run test:e2e",
     "test": "vitest",
     "test:unit": "vitest run",
     "test:e2e": "playwright test",
@@ -42,6 +46,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
+    "@feature-sliced/steiger-plugin": "^0.6.0",
     "@playwright/test": "^1.61.0",
     "@scalar/openapi-parser": "^0.28.7",
     "@tailwindcss/vite": "^4.1.18",
@@ -55,6 +60,7 @@
     "jsdom": "^29.1.1",
     "orval": "^8.18.0",
     "prettier": "^3.8.4",
+    "steiger": "^0.5.13",
     "tailwindcss": "^4.1.18",
     "typescript": "~6.0.2",
     "typescript-eslint": "^8.61.1",