fix(growth): Evolution Engine 穷尽审计 3CRITICAL + 3HIGH 全部修复

C-01: ExperienceExtractor 接入 ExperienceStore
- GrowthIntegration.new() 创建 ExperienceExtractor 时注入 ExperienceStore
- 经验持久化路径打通：extract_combined → persist_experiences → ExperienceStore

C-02+C-03: 进化触发链路全链路接通
- create_middleware_chain() 注册 EvolutionMiddleware (priority 78)
- MemoryMiddleware 持有 Arc<EvolutionMiddleware> 共享引用
- after_completion 中调用 check_evolution() → 推送 PendingEvolution
- EvolutionMiddleware 在下次对话前注入进化建议到 system prompt

H-01: FeedbackCollector loaded 标志修复
- load() 失败时保留 loaded=false，下次 save 重试
- 日志级别 debug → warn

H-03: FeedbackCollector 内部可变性
- EvolutionEngine.feedback 改为 Arc<Mutex<FeedbackCollector>>
- submit_feedback() 从 &mut self → &self，支持中间件 &self 调用路径
- GrowthIntegration.initialize() 从 &mut self → &self

H-05: 删除空测试 test_parse_empty_response (无 assert)

H-06: infer_experiences_from_memories() fallback
- Outcome::Success → Outcome::Partial (反映推断不确定性)

desktop/src-tauri/src/intelligence/extraction_adapter.rs

@@ -335,22 +335,6 @@ mod tests {
         assert!(!is_extraction_driver_configured());
     }
 
-    #[test]
-    fn test_parse_empty_response() {
-        // We cannot create a real LlmDriver easily in tests, so we test the
-        // parsing logic via a minimal helper.
-        struct DummyDriver;
-        impl TauriExtractionDriver {
-            fn parse_response_test(
-                &self,
-                response_text: &str,
-                extraction_type: MemoryType,
-            ) -> Vec<ExtractedMemory> {
-                self.parse_response(response_text, extraction_type)
-            }
-        }
-    }
-
     #[test]
     fn test_parse_valid_json_response() {
         let response = r#"```json