fix(memory): 跨会话记忆断裂修复 — profile_store连接+双数据库统一+诊断日志

根因: 3个断裂点
1. profile_store未连接: create_middleware_chain()中GrowthIntegration未设置
   UserProfileStore, 导致extract_combined()的profile_signals被静默丢弃
2. 双数据库不一致: UserProfileStore写入data.db, agent_get读取memories.db,
   两库隔离导致UserProfile永远读不到
3. 缺少关键日志: 提取/存储/检索链路无info级别日志, 问题难以诊断

修复:
- create_middleware_chain()中添加 with_profile_store(memory.pool())
- agent_get改为使用kernel.memory()而非viking_commands::get_storage()
- Kernel暴露memory()方法返回Arc<MemoryStore>
- growth.rs增强日志: 存储成功/失败/提取详情/profile更新数

验证: Tauri端E2E测试通过
- 会话A发送消息 → 提取6记忆+4 profile signals → 存储成功
- 新会话B发送消息 → Injected memories → LLM回复提及之前话题
- 管家Tab显示: 用户画像(医疗/健康)+近期话题+53条记忆分组

crates/zclaw-runtime/src/growth.rs

@@ -330,15 +330,43 @@ impl GrowthIntegration {
             && combined.experiences.is_empty()
             && !combined.profile_signals.has_any_signal()
         {
+            tracing::debug!(
+                "[GrowthIntegration] Combined extraction produced nothing for agent {}",
+                agent_id
+            );
             return Ok(None);
         }
 
         let mem_count = combined.memories.len();
+        tracing::info!(
+            "[GrowthIntegration] Combined extraction for agent {}: {} memories, {} experiences, {} profile signals",
+            agent_id,
+            mem_count,
+            combined.experiences.len(),
+            combined.profile_signals.signal_count()
+        );
 
         // Store raw memories
-        self.extractor
+        match self.extractor
             .store_memories(&agent_id.to_string(), &combined.memories)
-            .await?;
+            .await
+        {
+            Ok(stored) => {
+                tracing::info!(
+                    "[GrowthIntegration] Stored {} memories for agent {}",
+                    stored,
+                    agent_id
+                );
+            }
+            Err(e) => {
+                tracing::error!(
+                    "[GrowthIntegration] Failed to store memories for agent {}: {}",
+                    agent_id,
+                    e
+                );
+                return Err(e);
+            }
+        }
 
         // Track learning event
         self.tracker
@@ -362,6 +390,11 @@ impl GrowthIntegration {
         // Update user profile from extraction signals (L1 enhancement)
         if let Some(profile_store) = &self.profile_store {
             let updates = self.profile_updater.collect_updates(&combined);
+            tracing::info!(
+                "[GrowthIntegration] Applying {} profile updates for agent {}",
+                updates.len(),
+                agent_id
+            );
             let user_id = agent_id.to_string();
             for update in updates {
                 let result = match update.kind {