docs: ai 协作文档体系重构与多 ai 仲裁结果落地

1.AI 协作文档体系重构(objections/worklines/contracts+matrix.md)

2.coord 仲裁文档(final-decisions/cross-review/final-rulings/orchestration)

3.各服务 01/02 文档补全

4.共享包初始化(shared-ts/shared-go/hooks/ui-components/ui-tokens)

5.Proto 契约补全

6.004 架构影响地图更新

7.端口分配表

8.设计规格文档

packages/ui-components/src/error-boundary.tsx

@@ -0,0 +1,88 @@
+import { Component, type ErrorInfo, type ReactNode } from "react";
+
+/**
+ * ErrorBoundary - React 渲染异常兜底（fallback UI）
+ *
+ * 用途：捕获子组件树渲染异常，展示降级 UI，避免整页白屏。
+ *
+ * @example
+ * <ErrorBoundary fallback={<ErrorFallback />}>
+ *   <Dashboard />
+ * </ErrorBoundary>
+ */
+
+export interface ErrorBoundaryProps {
+  children: ReactNode;
+  /** 自定义降级 UI；未提供时使用默认 fallback */
+  fallback?: ReactNode | ((error: Error, reset: () => void) => ReactNode);
+  /** 错误回调（上报 / 日志） */
+  onError?: (error: Error, info: ErrorInfo) => void;
+  /** 重置回调（用于外部触发重试） */
+  onReset?: () => void;
+}
+
+export interface ErrorBoundaryState {
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<
+  ErrorBoundaryProps,
+  ErrorBoundaryState
+> {
+  state: ErrorBoundaryState = { error: null };
+
+  static getDerivedStateFromError(error: Error): ErrorBoundaryState {
+    return { error };
+  }
+
+  componentDidCatch(error: Error, info: ErrorInfo): void {
+    this.props.onError?.(error, info);
+  }
+
+  reset = (): void => {
+    this.props.onReset?.();
+    this.setState({ error: null });
+  };
+
+  render(): ReactNode {
+    const { error } = this.state;
+    const { children, fallback } = this.props;
+
+    if (error) {
+      if (typeof fallback === "function") {
+        return fallback(error, this.reset);
+      }
+      if (fallback !== undefined) {
+        return fallback;
+      }
+      return <DefaultErrorFallback error={error} onReset={this.reset} />;
+    }
+
+    return children;
+  }
+}
+
+function DefaultErrorFallback({
+  error,
+  onReset,
+}: {
+  error: Error;
+  onReset: () => void;
+}): ReactNode {
+  return (
+    <div
+      role="alert"
+      className="flex min-h-[200px] flex-col items-center justify-center gap-4 p-8"
+    >
+      <h2 className="text-lg font-semibold">出错了</h2>
+      <p className="text-sm text-muted-foreground">{error.message}</p>
+      <button
+        type="button"
+        onClick={onReset}
+        className="rounded-md bg-primary px-4 py-2 text-sm text-primary-foreground hover:bg-primary/90"
+      >
+        重试
+      </button>
+    </div>
+  );
+}