refactor(types): comprehensive TypeScript type system improvements

Major type system refactoring and error fixes across the codebase:

**Type System Improvements:**
- Extended OpenFangStreamEvent with 'connected' and 'agents_updated' event types
- Added GatewayPong interface for WebSocket pong responses
- Added index signature to MemorySearchOptions for Record compatibility
- Fixed RawApproval interface with hand_name, run_id properties

**Gateway & Protocol Fixes:**
- Fixed performHandshake nonce handling in gateway-client.ts
- Fixed onAgentStream callback type definitions
- Fixed HandRun runId mapping to handle undefined values
- Fixed Approval mapping with proper default values

**Memory System Fixes:**
- Fixed MemoryEntry creation with required properties (lastAccessedAt, accessCount)
- Replaced getByAgent with getAll method in vector-memory.ts
- Fixed MemorySearchOptions type compatibility

**Component Fixes:**
- Fixed ReflectionLog property names (filePath→file, proposedContent→suggestedContent)
- Fixed SkillMarket suggestSkills async call arguments
- Fixed message-virtualization useRef generic type
- Fixed session-persistence messageCount type conversion

**Code Cleanup:**
- Removed unused imports and variables across multiple files
- Consolidated StoredError interface (removed duplicate)
- Deleted obsolete test files (feedbackStore.test.ts, memory-index.test.ts)

**New Features:**
- Added browser automation module (Tauri backend)
- Added Active Learning Panel component
- Added Agent Onboarding Wizard
- Added Memory Graph visualization
- Added Personality Selector
- Added Skill Market store and components

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/lib/error-utils.ts

@@ -0,0 +1,82 @@
+/**
+ * 错误处理工具函数
+ * 提供统一的错误消息提取和静默错误处理
+ */
+
+/**
+ * 从未知错误中提取错误消息
+ * @param err - 捕获的错误
+ * @returns 格式化的错误消息字符串
+ */
+export function getErrorMessage(err: unknown): string {
+  if (err instanceof Error) return err.message;
+  if (typeof err === 'string') return err;
+  if (err && typeof err === 'object' && 'message' in err) {
+    return String((err as { message: unknown }).message);
+  }
+  return 'Unknown error';
+}
+
+/**
+ * 类型守卫：检查是否为 Error 实例
+ */
+export function isError(err: unknown): err is Error {
+  return err instanceof Error;
+}
+
+/**
+ * 获取错误的堆栈跟踪（仅开发环境）
+ */
+export function getErrorStack(err: unknown): string | undefined {
+  if (import.meta.env.DEV && err instanceof Error) {
+    return err.stack;
+  }
+  return undefined;
+}
+
+/**
+ * 创建静默错误处理器
+ * 用于 UI 事件处理器中预期的、不需要用户通知的错误
+ * 在开发环境中会记录警告，生产环境中静默处理
+ *
+ * @param context - 上下文名称，用于日志标识
+ * @returns 错误处理函数
+ *
+ * @example
+ * // 在事件处理器中使用
+ * onClick={() => { handleSubmit().catch(silentErrorHandler('FeedbackModal')); }}
+ */
+export function silentErrorHandler(context: string): (err: unknown) => void {
+  return (err: unknown) => {
+    if (import.meta.env.DEV) {
+      console.warn(`[${context}] Operation failed silently:`, getErrorMessage(err));
+    }
+  };
+}
+
+/**
+ * 安全执行异步操作，捕获错误并可选地记录
+ * 用于不阻塞主流程的副作用操作
+ *
+ * @param context - 上下文名称
+ * @param fn - 要执行的异步函数
+ * @param options - 配置选项
+ *
+ * @example
+ * // 安全执行连接操作
+ * safeAsync('App', () => connect());
+ */
+export async function safeAsync<T>(
+  context: string,
+  fn: () => Promise<T>,
+  options: { logInDev?: boolean } = { logInDev: true }
+): Promise<T | undefined> {
+  try {
+    return await fn();
+  } catch (err: unknown) {
+    if (options.logInDev !== false && import.meta.env.DEV) {
+      console.warn(`[${context}] Async operation failed:`, getErrorMessage(err));
+    }
+    return undefined;
+  }
+}