feat(flywheel-L0): F1 全量历史导入 + 跨项目 Git 健康度聚合

- ingest_full_git_history: 最多 500 条历史，INSERT OR IGNORE 幂等，事务批量写入
- get_project_commit_health: 直接聚合 commit_metrics，返回规范化率/返工率/top_scopes
- 前端 commands.ts 补 IngestResult/ProjectCommitHealth/ScopeActivity 封装
- 新增 4 个单元测试（空项目排除、聚合正确性、scope 排序、写入幂等）

.blueprint/manifest.yaml

@@ -305,6 +305,7 @@ modules:
     area: backend
     status: in_progress
     progress: 86
+    note: "L0 数据层已完成；F1+F2（展示层）待做；阶段三待数据积累"
     position: [1750, 650]
 
   - id: cloud-products

.blueprint/modules/flywheel-intelligence.md

@@ -110,6 +110,21 @@
 
 ---
 
+### 📋 F1. Git 健康度后端——全量历史导入 + 跨项目聚合
+- status: todo
+- complexity: M
+- files: src-tauri/src/commands/commit_metrics.rs, src-tauri/src/lib.rs, src/lib/commands.ts
+- acceptance: 新增 `ingest_full_git_history(project_id, project_path)` 命令（最多 500 条，INSERT OR IGNORE 幂等）；新增 `get_project_commit_health(project_ids)` 命令返回各项目 conventional_rate/rework_rate/top_scopes；单元测试覆盖 ingest 幂等性和 health 聚合
+
+### 📋 F2. 飞轮面板——Git 健康度区块 + 全量导入按钮
+- status: todo
+- complexity: M
+- depends: F1
+- files: src/lib/commands.ts, src/components/dashboard/BlueprintModal.tsx
+- acceptance: FlywheelPanel 底部新增"Git 执行质量"卡片，表格展示各项目 commit 规范化率/返工率/TOP scope；"全量导入"按钮对所有已接入项目触发 ingest_full_git_history，显示 loading 和结果摘要；无类型错误
+
+---
+
 ### 阶段三：执行质量预测层
 - status: todo
 - complexity: L

src-tauri/src/commands/commit_metrics.rs

@@ -154,6 +154,186 @@ pub fn get_commit_stats(project_id: String) -> Result<CommitStats, String> {
     })
 }
 
+// ── 全量历史导入 ──────────────────────────────────────────────────────────────
+
+const FULL_HISTORY_LIMIT: usize = 500;
+
+/// 全量历史补录结果。
+#[derive(Debug, Serialize)]
+pub struct IngestResult {
+    /// 本次新写入 commit 数
+    pub imported: u32,
+    /// 已存在（INSERT OR IGNORE 跳过）
+    pub skipped: u32,
+}
+
+/// 读取 git log 最近 limit 条：返回 (sha, subject, committed_at_iso)。
+fn read_git_log(root: &std::path::Path, limit: usize) -> Result<Vec<(String, String, String)>, String> {
+    const FMT: &str = "--format=%H%x1f%s%x1f%cI";
+    let out = crate::silent_cmd("git")
+        .args(["log", "-n", &limit.to_string(), FMT])
+        .current_dir(root)
+        .output()
+        .map_err(|e| format!("git log 失败: {e}"))?;
+    if !out.status.success() {
+        return Err(format!("git log 错误: {}", String::from_utf8_lossy(&out.stderr)));
+    }
+    Ok(String::from_utf8_lossy(&out.stdout)
+        .lines()
+        .filter_map(|line| {
+            let mut parts = line.split('\u{1f}');
+            let sha = parts.next()?.trim().to_string();
+            if sha.is_empty() { return None; }
+            let subject = parts.next().unwrap_or("").to_string();
+            let date = parts.next().unwrap_or("").to_string();
+            Some((sha, subject, date))
+        })
+        .collect())
+}
+
+/// 全量历史导入：扫描最近 500 条 commit，幂等写入 commit_metrics 表。
+/// 与 buff 的增量写入互不干扰（同 sha INSERT OR IGNORE）。
+#[tauri::command]
+pub fn ingest_full_git_history(
+    project_id: String,
+    project_path: String,
+) -> Result<IngestResult, String> {
+    let root = std::path::Path::new(project_path.trim_end_matches(['/', '\\']));
+    if !root.exists() {
+        return Err(format!("目录不存在: {}", root.display()));
+    }
+    let commits = read_git_log(root, FULL_HISTORY_LIMIT)?;
+    let total = commits.len() as u32;
+
+    let conn = crate::db::pool().get().map_err(|e| e.to_string())?;
+    let tx = conn.unchecked_transaction().map_err(|e| e.to_string())?;
+    let mut imported = 0u32;
+    for (sha, subject, date) in &commits {
+        let p = parse_conventional(subject);
+        let n = conn.execute(
+            "INSERT OR IGNORE INTO commit_metrics
+                (sha, project_id, commit_type, scope, is_rework, is_ci_auto, committed_at)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7)",
+            rusqlite::params![
+                sha, project_id, p.commit_type, p.scope,
+                p.is_rework as i32, p.is_ci_auto as i32,
+                if date.is_empty() { None } else { Some(date.as_str()) },
+            ],
+        ).map_err(|e| e.to_string())?;
+        imported += n as u32;
+    }
+    tx.commit().map_err(|e| e.to_string())?;
+    Ok(IngestResult { imported, skipped: total - imported })
+}
+
+// ── 跨项目 Git 健康度聚合 ─────────────────────────────────────────────────────
+
+/// 单个 scope 的活跃度摘要。
+#[derive(Debug, Serialize)]
+pub struct ScopeActivity {
+    pub scope: String,
+    pub commit_count: u32,
+    pub rework_count: u32,
+}
+
+/// 单项目 Git 健康度指标。
+#[derive(Debug, Serialize)]
+pub struct ProjectCommitHealth {
+    pub project_id: String,
+    pub total_commits: u32,
+    pub conventional_commits: u32,
+    /// conventional / total（0.0 – 1.0，三位小数）
+    pub conventional_rate: f64,
+    pub rework_commits: u32,
+    /// fix(非CI) / conventional（0.0 – 1.0，三位小数）
+    pub rework_rate: f64,
+    /// 按 commit 数降序的前 5 个 scope
+    pub top_scopes: Vec<ScopeActivity>,
+}
+
+/// 内部聚合逻辑，接受 Connection 引用，方便测试直接调用。
+pub fn project_commit_health_inner(
+    conn: &rusqlite::Connection,
+    project_ids: &[String],
+) -> Result<Vec<ProjectCommitHealth>, String> {
+    let round3 = |v: f64| (v * 1000.0).round() / 1000.0;
+    let mut result = Vec::new();
+
+    for pid in project_ids {
+        let total: u32 = conn
+            .query_row(
+                "SELECT COUNT(*) FROM commit_metrics WHERE project_id = ?1",
+                rusqlite::params![pid],
+                |r| r.get::<_, i64>(0),
+            )
+            .unwrap_or(0) as u32;
+        if total == 0 { continue; }
+
+        let conventional: u32 = conn
+            .query_row(
+                "SELECT COUNT(*) FROM commit_metrics WHERE project_id = ?1 AND commit_type IS NOT NULL",
+                rusqlite::params![pid],
+                |r| r.get::<_, i64>(0),
+            )
+            .unwrap_or(0) as u32;
+
+        let rework: u32 = conn
+            .query_row(
+                "SELECT COUNT(*) FROM commit_metrics WHERE project_id = ?1 AND is_rework=1 AND is_ci_auto=0",
+                rusqlite::params![pid],
+                |r| r.get::<_, i64>(0),
+            )
+            .unwrap_or(0) as u32;
+
+        let mut stmt = conn
+            .prepare(
+                "SELECT scope,
+                        COUNT(*) AS cnt,
+                        SUM(CASE WHEN is_rework=1 AND is_ci_auto=0 THEN 1 ELSE 0 END) AS rc
+                 FROM commit_metrics
+                 WHERE project_id = ?1 AND scope IS NOT NULL
+                 GROUP BY scope
+                 ORDER BY cnt DESC
+                 LIMIT 5",
+            )
+            .map_err(|e| e.to_string())?;
+        let top_scopes: Vec<ScopeActivity> = stmt
+            .query_map(rusqlite::params![pid], |row| {
+                Ok(ScopeActivity {
+                    scope: row.get(0)?,
+                    commit_count: row.get::<_, i64>(1)? as u32,
+                    rework_count: row.get::<_, i64>(2)? as u32,
+                })
+            })
+            .map_err(|e| e.to_string())?
+            .filter_map(|r| r.ok())
+            .collect();
+
+        result.push(ProjectCommitHealth {
+            conventional_rate: round3(if total > 0 { conventional as f64 / total as f64 } else { 0.0 }),
+            rework_rate: round3(if conventional > 0 { rework as f64 / conventional as f64 } else { 0.0 }),
+            project_id: pid.clone(),
+            total_commits: total,
+            conventional_commits: conventional,
+            rework_commits: rework,
+            top_scopes,
+        });
+    }
+    Ok(result)
+}
+
+/// 批量查询各项目的 Git 健康度（直接从 commit_metrics 表聚合，不经 usage.json）。
+#[tauri::command]
+pub fn get_project_commit_health(
+    project_ids: Vec<String>,
+) -> Result<Vec<ProjectCommitHealth>, String> {
+    if project_ids.is_empty() {
+        return Ok(vec![]);
+    }
+    let conn = crate::db::pool().get().map_err(|e| e.to_string())?;
+    project_commit_health_inner(&conn, &project_ids)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -249,4 +429,67 @@ mod tests {
         assert_eq!(total, 2);
         assert_eq!(conv, 1);
     }
+
+    // ── F1 新增测试 ────────────────────────────────────────────────────────────
+
+    /// 辅助：向 in-memory DB 写入一批 commits
+    fn seed_commits(conn: &rusqlite::Connection, pid: &str, msgs: &[(&str, &str)]) {
+        for (sha, msg) in msgs {
+            record_commit(conn, pid, sha, msg, None).unwrap();
+        }
+    }
+
+    #[test]
+    fn health_empty_project_excluded() {
+        let conn = crate::db::conn_with_schema();
+        // project_id 没有任何 commit，inner 函数应直接跳过返回空
+        let result = project_commit_health_inner(&conn, &["ghost-proj".to_string()]).unwrap();
+        assert!(result.is_empty(), "无数据项目应被跳过");
+    }
+
+    #[test]
+    fn health_aggregates_correctly() {
+        let conn = crate::db::conn_with_schema();
+        seed_commits(&conn, "p1", &[
+            ("a1", "feat(api): add endpoint"),
+            ("a2", "fix(api): correct response"),      // rework
+            ("a3", "fix(ci): auto-fix [DeepSeek-V3]"), // CI，不计返工
+            ("a4", "chore: update deps"),
+            ("a5", "random commit"),                   // 非 conventional
+        ]);
+        let result = project_commit_health_inner(&conn, &["p1".to_string()]).unwrap();
+        let h = &result[0];
+        assert_eq!(h.total_commits, 5);
+        assert_eq!(h.conventional_commits, 4); // a1/a2/a3/a4
+        assert_eq!(h.rework_commits, 1);        // 只有 a2（a3 是 CI）
+        assert!((h.conventional_rate - 0.8).abs() < 0.001);
+        assert!((h.rework_rate - 0.25).abs() < 0.001); // 1/4 conventional
+    }
+
+    #[test]
+    fn health_top_scopes_ordered_by_count() {
+        let conn = crate::db::conn_with_schema();
+        seed_commits(&conn, "p2", &[
+            ("b1", "feat(api): x"),
+            ("b2", "feat(api): y"),
+            ("b3", "feat(api): z"),
+            ("b4", "fix(db): bug"),
+            ("b5", "chore(db): cleanup"),
+        ]);
+        let result = project_commit_health_inner(&conn, &["p2".to_string()]).unwrap();
+        let h = &result[0];
+        assert_eq!(h.top_scopes[0].scope, "api");
+        assert_eq!(h.top_scopes[0].commit_count, 3);
+        assert_eq!(h.top_scopes[1].scope, "db");
+        assert_eq!(h.top_scopes[1].commit_count, 2);
+    }
+
+    #[test]
+    fn ingest_idempotent_via_record_commit() {
+        let conn = crate::db::conn_with_schema();
+        record_commit(&conn, "p3", "sha-dup", "feat: first write", None).unwrap();
+        record_commit(&conn, "p3", "sha-dup", "feat: second write", None).unwrap();
+        let (total, _) = conventional_stats(&conn, "p3").unwrap();
+        assert_eq!(total, 1, "重复 sha 应被 INSERT OR IGNORE 忽略");
+    }
 }

src-tauri/src/lib.rs

@@ -273,6 +273,8 @@ pub fn run() {
             commands::agent_infra::scan_doc_freshness,
             commands::agent_infra::get_doc_freshness_cache,
             commands::commit_metrics::get_commit_stats,
+            commands::commit_metrics::ingest_full_git_history,
+            commands::commit_metrics::get_project_commit_health,
             // mentor
             get_mentor_context,
             get_project_notes,

src/lib/commands.ts

@@ -1687,6 +1687,33 @@ export interface CommitStats {
 export const getCommitStats = (projectId: string) =>
   invoke<CommitStats>("get_commit_stats", { projectId });
 
+export interface IngestResult {
+  imported: number;
+  skipped: number;
+}
+
+export const ingestFullGitHistory = (projectId: string, projectPath: string) =>
+  invoke<IngestResult>("ingest_full_git_history", { projectId, projectPath });
+
+export interface ScopeActivity {
+  scope: string;
+  commit_count: number;
+  rework_count: number;
+}
+
+export interface ProjectCommitHealth {
+  project_id: string;
+  total_commits: number;
+  conventional_commits: number;
+  conventional_rate: number;
+  rework_commits: number;
+  rework_rate: number;
+  top_scopes: ScopeActivity[];
+}
+
+export const getProjectCommitHealth = (projectIds: string[]) =>
+  invoke<ProjectCommitHealth[]>("get_project_commit_health", { projectIds });
+
 // ── Beast Global Status (read-only) ───────────────────────────────────────────
 
 export interface BeastGlobalStatus {