refactor(api)!: align client with canonical HTTP contract

Route all feature requests through business API modules, sync generated DTOs, and add communication tests and architecture documentation.

BREAKING CHANGE: migrate the client to plural resource paths, canonical snake_case fields, ISO timestamps, and explicit paginated responses.

package.json

@@ -10,10 +10,13 @@
         "format": "prettier --write .",
         "format:check": "prettier --check .",
         "typecheck": "vue-tsc -b",
-        "check": "npm run lint && npm run format:check && npm run check:styles && npm run typecheck",
+        "check": "npm run lint && npm run format:check && npm run check:styles && npm run typecheck && npm test",
         "check:styles": "node scripts/check-style-system.mjs",
         "build": "vue-tsc -b && vite build",
-        "preview": "vite preview"
+        "preview": "vite preview",
+        "api:sync": "node scripts/sync-api-contract.mjs",
+        "api:check": "node scripts/sync-api-contract.mjs --check",
+        "test": "node --import ./scripts/test-resolver.mjs --test tests/*.test.mjs"
     },
     "dependencies": {
         "@amap/amap-jsapi-loader": "^1.0.1",