feat: Batch 5-9 — GrowthIntegration桥接、验证补全、死代码清理、Pipeline模板、Speech/Twitter真实实现

Batch 5 (P0): GrowthIntegration 接入 Tauri
- Kernel 新增 set_viking()/set_extraction_driver() 桥接 SqliteStorage
- 中间件链共享存储，MemoryExtractor 接入 LLM 驱动

Batch 6 (P1): 输入验证 + Heartbeat
- Relay 验证补全（stream 兼容检查、API key 格式校验）
- UUID 类型校验、SessionId 错误返回
- Heartbeat 默认开启 + 首次聊天自动初始化

Batch 7 (P2): 死代码清理
- zclaw-channels 整体移除（317 行）
- multi-agent 特性门控、admin 方法标注

Batch 8 (P2): Pipeline 模板
- PipelineMetadata 新增 annotations 字段
- pipeline_templates 命令 + 2 个示例模板
- fallback driver base_url 修复（doubao/qwen/deepseek 端点）

Batch 9 (P1): SpeechHand/TwitterHand 真实实现
- SpeechHand: tts_method 字段 + Browser TTS 前端集成 (Web Speech API)
- TwitterHand: 12 个 action 全部替换为 Twitter API v2 真实 HTTP 调用
- chatStore/useAutomationEvents 双路径 TTS 触发

desktop/src/hooks/useAutomationEvents.ts

@@ -12,6 +12,7 @@ import { useHandStore } from '../store/handStore';
 import { useWorkflowStore } from '../store/workflowStore';
 import { useChatStore } from '../store/chatStore';
 import type { GatewayClient } from '../lib/gateway-client';
+import { speechSynth } from '../lib/speech-synth';
 
 // === Event Types ===
 
@@ -161,6 +162,23 @@ export function useAutomationEvents(
           handResult: eventData.hand_result,
           runId: eventData.run_id,
         });
+
+        // Trigger browser TTS for SpeechHand results
+        if (eventData.hand_name === 'speech' && eventData.hand_result && typeof eventData.hand_result === 'object') {
+          const res = eventData.hand_result as Record<string, unknown>;
+          if (res.tts_method === 'browser' && typeof res.text === 'string' && res.text) {
+            speechSynth.speak({
+              text: res.text,
+              voice: typeof res.voice === 'string' ? res.voice : undefined,
+              language: typeof res.language === 'string' ? res.language : undefined,
+              rate: typeof res.rate === 'number' ? res.rate : undefined,
+              pitch: typeof res.pitch === 'number' ? res.pitch : undefined,
+              volume: typeof res.volume === 'number' ? res.volume : undefined,
+            }).catch((err: unknown) => {
+              console.warn('[useAutomationEvents] Browser TTS failed:', err);
+            });
+          }
+        }
       }
 
       // Handle error status