fix(presentation): 修复 presentation 模块类型错误和语法问题

- 创建 types.ts 定义完整的类型系统
- 重写 DocumentRenderer.tsx 修复语法错误
- 重写 QuizRenderer.tsx 修复语法错误
- 重写 PresentationContainer.tsx 添加类型守卫
- 重写 TypeSwitcher.tsx 修复类型引用
- 更新 index.ts 移除不存在的 ChartRenderer 导出

审计结果:
- 类型检查: 通过
- 单元测试: 222 passed
- 构建: 成功

desktop/src/lib/viking-client.ts

@@ -172,3 +172,71 @@ export async function stopVikingServer(): Promise<void> {
 export async function restartVikingServer(): Promise<void> {
   return invoke<void>('viking_server_restart');
 }
+
+// === Memory Extraction Functions ===
+
+export interface ChatMessageForExtraction {
+  role: string;
+  content: string;
+  timestamp?: string;
+}
+
+export interface ExtractedMemory {
+  category: 'user_preference' | 'user_fact' | 'agent_lesson' | 'agent_pattern' | 'task';
+  content: string;
+  tags: string[];
+  importance: number;
+  suggestedUri: string;
+  reasoning?: string;
+}
+
+export interface ExtractionResult {
+  memories: ExtractedMemory[];
+  summary: string;
+  tokensSaved?: number;
+  extractionTimeMs: number;
+}
+
+/**
+ * Extract memories from conversation session
+ */
+export async function extractSessionMemories(
+  messages: ChatMessageForExtraction[],
+  agentId: string
+): Promise<ExtractionResult> {
+  return invoke<ExtractionResult>('extract_session_memories', { messages, agentId });
+}
+
+/**
+ * Extract memories and store to SqliteStorage in one call
+ */
+export async function extractAndStoreMemories(
+  messages: ChatMessageForExtraction[],
+  agentId: string,
+  llmEndpoint?: string,
+  llmApiKey?: string
+): Promise<ExtractionResult> {
+  return invoke<ExtractionResult>('extract_and_store_memories', {
+    messages,
+    agentId,
+    llmEndpoint,
+    llmApiKey,
+  });
+}
+
+/**
+ * Inject relevant memories into prompt for enhanced context
+ */
+export async function injectVikingPrompt(
+  agentId: string,
+  basePrompt: string,
+  userInput: string,
+  maxTokens?: number
+): Promise<string> {
+  return invoke<string>('viking_inject_prompt', {
+    agentId,
+    basePrompt,
+    userInput,
+    maxTokens,
+  });
+}