feat: Evolution Engine Phase 3-5 — WorkflowComposer+FeedbackCollector+EvolutionMiddleware+反馈闭环

Phase 3:
- EvolutionMiddleware (priority 78): 管家对话中注入进化确认提示
- GrowthIntegration.check_evolution() API 串入

Phase 4:
- WorkflowComposer: 轨迹工具链模式聚类 + Pipeline YAML prompt 构建 + JSON 解析
- EvolutionEngine.analyze_trajectory_patterns() L3 入口

Phase 5:
- FeedbackCollector: 反馈信号收集 + 信任度管理 + 推荐(Optimize/Archive/Promote)
- EvolutionEngine 反馈闭环方法: submit_feedback/get_artifacts_needing_optimization

新增 12 个测试（111→123），全 workspace 701 测试通过。

crates/zclaw-growth/src/feedback_collector.rs

@@ -0,0 +1,298 @@
+//! 反馈信号收集与信任度管理（Phase 5 反馈闭环）
+//! 收集用户对进化产物（技能/Pipeline）的显式/隐式反馈
+//! 管理信任度衰减和优化循环
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+
+/// 反馈信号类型
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub enum FeedbackSignal {
+    /// 用户直接表达的意见
+    Explicit,
+    /// 从使用行为推断
+    ImplicitUsage,
+    /// 使用频率
+    UsageCount,
+    /// 任务完成率
+    CompletionRate,
+}
+
+/// 情感倾向
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub enum Sentiment {
+    Positive,
+    Negative,
+    Neutral,
+}
+
+/// 进化产物类型
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub enum EvolutionArtifact {
+    Skill,
+    Pipeline,
+}
+
+/// 单条反馈记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FeedbackEntry {
+    pub artifact_id: String,
+    pub artifact_type: EvolutionArtifact,
+    pub signal: FeedbackSignal,
+    pub sentiment: Sentiment,
+    pub details: Option<String>,
+    pub timestamp: DateTime<Utc>,
+}
+
+/// 信任度记录
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TrustRecord {
+    pub artifact_id: String,
+    pub artifact_type: EvolutionArtifact,
+    pub trust_score: f32,
+    pub total_feedback: u32,
+    pub positive_count: u32,
+    pub negative_count: u32,
+    pub last_updated: DateTime<Utc>,
+}
+
+/// 反馈收集器
+/// 管理反馈记录和信任度评分
+pub struct FeedbackCollector {
+    /// 信任度记录表（内存，可持久化到 SQLite）
+    trust_records: Vec<TrustRecord>,
+}
+
+impl FeedbackCollector {
+    pub fn new() -> Self {
+        Self {
+            trust_records: Vec::new(),
+        }
+    }
+
+    /// 提交一条反馈
+    pub fn submit_feedback(&mut self, entry: FeedbackEntry) -> TrustUpdate {
+        let record = self.get_or_create_record(&entry.artifact_id, &entry.artifact_type);
+
+        // 更新计数
+        record.total_feedback += 1;
+        match entry.sentiment {
+            Sentiment::Positive => record.positive_count += 1,
+            Sentiment::Negative => record.negative_count += 1,
+            Sentiment::Neutral => {}
+        }
+
+        // 重新计算信任度
+        let old_score = record.trust_score;
+        record.trust_score = Self::calculate_trust_internal(
+            record.positive_count,
+            record.negative_count,
+            record.total_feedback,
+            record.last_updated,
+        );
+        record.last_updated = Utc::now();
+
+        let new_score = record.trust_score;
+        let total = record.total_feedback;
+        let action = Self::recommend_action_internal(new_score, total);
+
+        TrustUpdate {
+            artifact_id: entry.artifact_id.clone(),
+            old_score,
+            new_score,
+            action,
+        }
+    }
+
+    /// 获取信任度记录
+    pub fn get_trust(&self, artifact_id: &str) -> Option<&TrustRecord> {
+        self.trust_records.iter().find(|r| r.artifact_id == artifact_id)
+    }
+
+    /// 获取所有需要优化的产物（信任度 < 0.4）
+    pub fn get_artifacts_needing_optimization(&self) -> Vec<&TrustRecord> {
+        self.trust_records
+            .iter()
+            .filter(|r| r.trust_score < 0.4 && r.total_feedback >= 2)
+            .collect()
+    }
+
+    /// 获取所有应该归档的产物（信任度 < 0.2 且反馈 >= 5）
+    pub fn get_artifacts_to_archive(&self) -> Vec<&TrustRecord> {
+        self.trust_records
+            .iter()
+            .filter(|r| r.trust_score < 0.2 && r.total_feedback >= 5)
+            .collect()
+    }
+
+    /// 获取所有高信任产物（信任度 >= 0.8）
+    pub fn get_recommended_artifacts(&self) -> Vec<&TrustRecord> {
+        self.trust_records
+            .iter()
+            .filter(|r| r.trust_score >= 0.8)
+            .collect()
+    }
+
+    fn get_or_create_record(
+        &mut self,
+        artifact_id: &str,
+        artifact_type: &EvolutionArtifact,
+    ) -> &mut TrustRecord {
+        let exists = self
+            .trust_records
+            .iter()
+            .any(|r| r.artifact_id == artifact_id);
+        if !exists {
+            self.trust_records.push(TrustRecord {
+                artifact_id: artifact_id.to_string(),
+                artifact_type: artifact_type.clone(),
+                trust_score: 0.5, // 初始信任度
+                total_feedback: 0,
+                positive_count: 0,
+                negative_count: 0,
+                last_updated: Utc::now(),
+            });
+        }
+        self.trust_records
+            .iter_mut()
+            .find(|r| r.artifact_id == artifact_id)
+            .unwrap()
+    }
+
+    fn calculate_trust_internal(
+        positive: u32,
+        negative: u32,
+        total: u32,
+        last_updated: DateTime<Utc>,
+    ) -> f32 {
+        if total == 0 {
+            return 0.5;
+        }
+        let positive_ratio = positive as f32 / total as f32;
+        let negative_penalty = negative as f32 * 0.1;
+        let days_since = (Utc::now() - last_updated).num_days().max(0) as f32;
+        let time_decay = 1.0 - (days_since * 0.005).min(0.5);
+        (positive_ratio * time_decay - negative_penalty).clamp(0.0, 1.0)
+    }
+
+    fn recommend_action_internal(trust_score: f32, total_feedback: u32) -> RecommendedAction {
+        if trust_score >= 0.8 {
+            RecommendedAction::Promote
+        } else if trust_score < 0.2 && total_feedback >= 5 {
+            RecommendedAction::Archive
+        } else if trust_score < 0.4 && total_feedback >= 2 {
+            RecommendedAction::Optimize
+        } else {
+            RecommendedAction::Monitor
+        }
+    }
+}
+
+impl Default for FeedbackCollector {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+/// 信任度更新结果
+#[derive(Debug, Clone)]
+pub struct TrustUpdate {
+    pub artifact_id: String,
+    pub old_score: f32,
+    pub new_score: f32,
+    pub action: RecommendedAction,
+}
+
+/// 建议动作
+#[derive(Debug, Clone, PartialEq)]
+pub enum RecommendedAction {
+    /// 继续观察
+    Monitor,
+    /// 需要优化
+    Optimize,
+    /// 建议归档（降级为记忆）
+    Archive,
+    /// 建议提升为推荐技能
+    Promote,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn make_feedback(artifact_id: &str, sentiment: Sentiment) -> FeedbackEntry {
+        FeedbackEntry {
+            artifact_id: artifact_id.to_string(),
+            artifact_type: EvolutionArtifact::Skill,
+            signal: FeedbackSignal::Explicit,
+            sentiment,
+            details: None,
+            timestamp: Utc::now(),
+        }
+    }
+
+    #[test]
+    fn test_initial_trust() {
+        let collector = FeedbackCollector::new();
+        assert!(collector.get_trust("skill-1").is_none());
+    }
+
+    #[test]
+    fn test_positive_feedback_increases_trust() {
+        let mut collector = FeedbackCollector::new();
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Positive));
+        let record = collector.get_trust("skill-1").unwrap();
+        assert!(record.trust_score > 0.5);
+        assert_eq!(record.positive_count, 1);
+    }
+
+    #[test]
+    fn test_negative_feedback_decreases_trust() {
+        let mut collector = FeedbackCollector::new();
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Negative));
+        let record = collector.get_trust("skill-1").unwrap();
+        assert!(record.trust_score < 0.5);
+    }
+
+    #[test]
+    fn test_mixed_feedback() {
+        let mut collector = FeedbackCollector::new();
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Positive));
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Positive));
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Negative));
+        let record = collector.get_trust("skill-1").unwrap();
+        assert_eq!(record.total_feedback, 3);
+        assert!(record.trust_score > 0.3); // 2/3 positive
+    }
+
+    #[test]
+    fn test_recommend_optimize() {
+        let mut collector = FeedbackCollector::new();
+        // 2 negative → trust < 0.4
+        collector.submit_feedback(make_feedback("skill-1", Sentiment::Negative));
+        let update = collector.submit_feedback(make_feedback("skill-1", Sentiment::Negative));
+        assert_eq!(update.action, RecommendedAction::Optimize);
+    }
+
+    #[test]
+    fn test_needs_optimization_filter() {
+        let mut collector = FeedbackCollector::new();
+        collector.submit_feedback(make_feedback("bad-skill", Sentiment::Negative));
+        collector.submit_feedback(make_feedback("bad-skill", Sentiment::Negative));
+        collector.submit_feedback(make_feedback("good-skill", Sentiment::Positive));
+
+        let needs = collector.get_artifacts_needing_optimization();
+        assert_eq!(needs.len(), 1);
+        assert_eq!(needs[0].artifact_id, "bad-skill");
+    }
+
+    #[test]
+    fn test_promote_recommendation() {
+        let mut collector = FeedbackCollector::new();
+        for _ in 0..5 {
+            collector.submit_feedback(make_feedback("great-skill", Sentiment::Positive));
+        }
+        let recommended = collector.get_recommended_artifacts();
+        assert_eq!(recommended.len(), 1);
+    }
+}