diff --git a/src-tauri/src/commands/blueprint.rs b/src-tauri/src/commands/blueprint.rs
index c3d0363..79fe0f8 100644
--- a/src-tauri/src/commands/blueprint.rs
+++ b/src-tauri/src/commands/blueprint.rs
@@ -4,10 +4,10 @@ use std::path::Path;
 // ── 主节点：master CONVENTIONS.md 内容和版本（编译时嵌入）────────────────────
 
 const MASTER_CONVENTIONS: &str = include_str!("../../../.blueprint/CONVENTIONS.md");
-const MASTER_CONVENTIONS_VERSION: &str = "1.4.0";
+const MASTER_CONVENTIONS_VERSION: &str = "1.4.2";
 
 // CLAUDE.md 蓝图管理区模板（版本与 CONVENTIONS 保持一致）
-const CLAUDE_MANAGED_TEMPLATE: &str = r#"<!-- BLUEPRINT_MANAGED_START version="1.4.0" -->
+const CLAUDE_MANAGED_TEMPLATE: &str = r#"<!-- BLUEPRINT_MANAGED_START version="1.4.2" -->
 ## 项目蓝图
 
 本项目使用 `.blueprint/` 目录维护项目全景架构图，驱动需求讨论和任务管理。
@@ -1192,23 +1192,26 @@ pub fn get_flywheel_stats(project_paths: Vec<String>) -> Result<FlywheelStats, S
         };
         projects_with_data += 1;
 
-        // 所有快照中收集 blocked_reasons
-        for snap in snapshots.iter() {
-            if let Some(reasons) = snap["blocked_reasons"].as_array() {
-                for r in reasons {
-                    if let Some(s) = r.as_str() {
-                        *reason_counts.entry(s.to_string()).or_insert(0) += 1;
-                    }
-                }
-            }
-        }
-
-        // 最新快照
-        let latest = snapshots.last().unwrap();
+        // 最新快照：按 at 字段取最大值，不依赖写入顺序
+        let latest = snapshots.iter()
+            .max_by_key(|s| s["at"].as_str().unwrap_or(""))
+            .unwrap();
 
         let conventions_version = latest["conventions_version"]
             .as_str().unwrap_or("unknown").to_string();
 
+        // conventions_version 无效时跳过（历史脏数据或未同步规则的项目）
+        if conventions_version == "unknown" { continue; }
+
+        // blocked_reasons 只取最新快照，避免历史快照反复计数导致虚高
+        if let Some(reasons) = latest["blocked_reasons"].as_array() {
+            for r in reasons {
+                if let Some(s) = r.as_str() {
+                    *reason_counts.entry(s.to_string()).or_insert(0) += 1;
+                }
+            }
+        }
+
         let latest_dt = latest["at"].as_str()
             .and_then(|s| chrono::DateTime::parse_from_rfc3339(s).ok())
             .map(|dt| dt.with_timezone(&chrono::Utc));
@@ -1312,8 +1315,17 @@ pub fn get_flywheel_stats(project_paths: Vec<String>) -> Result<FlywheelStats, S
         }
     }).collect();
 
-    // 按版本降序
-    cohorts.sort_by(|a, b| b.conventions_version.cmp(&a.conventions_version));
+    // 按语义版本降序（解析 "1.4.10" 为 (1,4,10) 再比较，避免字符串排序的 "1.4.9" > "1.4.10" 问题）
+    let parse_semver = |s: &str| -> (u32, u32, u32) {
+        let mut parts = s.splitn(3, '.');
+        let major = parts.next().and_then(|x| x.parse().ok()).unwrap_or(0);
+        let minor = parts.next().and_then(|x| x.parse().ok()).unwrap_or(0);
+        let patch = parts.next().and_then(|x| x.parse().ok()).unwrap_or(0);
+        (major, minor, patch)
+    };
+    cohorts.sort_by(|a, b| {
+        parse_semver(&b.conventions_version).cmp(&parse_semver(&a.conventions_version))
+    });
 
     // TOP10 blocked reasons
     let mut sorted_reasons: Vec<_> = reason_counts.into_iter().collect();
@@ -1507,9 +1519,11 @@ fn append_usage_snapshot(bp_dir: &Path, manifest: &BlueprintManifest, stats: &Bl
         .unwrap_or("unknown")
         .to_string();
 
-    // 读取 CONVENTIONS 版本
-    let conventions_version = read_frontmatter_version(&bp_dir.join("CONVENTIONS.md"))
-        .unwrap_or_else(|| "unknown".to_string());
+    // 读取 CONVENTIONS 版本；缺失时跳过快照写入，避免产生 vunknown 脏数据
+    let conventions_version = match read_frontmatter_version(&bp_dir.join("CONVENTIONS.md")) {
+        Some(v) => v,
+        None => return,
+    };
 
     // UTC 时间
     let now = chrono::Utc::now();