style: 修复scripts目录ruff F841/B007/F401/F541问题（9个文件）

修复scripts目录下ruff检测到的18个问题：F841未使用变量6处、F401未使用import 10处、B007未使用循环变量1处、F541 f-string缺少占位符1处。

scripts/ci/ci_health_report.py

@@ -96,7 +96,7 @@ def build_feishu_card(data: dict) -> dict:
 
     # 失败详情（最多显示5条）
     fail_detail_lines = []
-    for i, run in enumerate(failed_runs[:5]):
+    for _i, run in enumerate(failed_runs[:5]):
         run_id = run["id"]
         title = run.get("title", "")[:35]
         branch = run.get("branch", "")

scripts/ci/ci_repeated_failure_detector.py

@@ -122,8 +122,8 @@ def analyze_failures(runs):
 
     for run in sorted_runs:
         run_id = run.get("id")
-        run_status = run.get("status", "")
-        run_conclusion = run.get("conclusion", "")
+        run.get("status", "")
+        run.get("conclusion", "")
         run_started = run.get("started_at", run.get("created_at", ""))
         event = run.get("event", "")
 
@@ -135,7 +135,7 @@ def analyze_failures(runs):
 
         for job in jobs:
             name = job.get("name", "")
-            status = job.get("status", "")
+            job.get("status", "")
             conclusion = job.get("conclusion", "")
 
             # 跳过非CI核心job（如AI Code Review、Preview等）
@@ -176,7 +176,7 @@ def analyze_failures(runs):
                 # cancelled不算失败也不打断
 
     # 计算失败率
-    for name, stats in job_stats.items():
+    for _name, stats in job_stats.items():
         total_actual = stats["total"] - stats["skipped"] - stats["cancelled"]
         if total_actual > 0:
             stats["failure_rate"] = round((stats["failure"] + stats["error"]) / total_actual * 100, 1)
@@ -240,10 +240,10 @@ def generate_report(critical, warning, info, days, total_runs):
     lines.append(f"**生成时间**: {datetime.now(timezone.utc).strftime('%Y-%m-%d %H:%M UTC')}")
     lines.append("")
 
-    lines.append(f"## 概览")
+    lines.append("## 概览")
     lines.append("")
-    lines.append(f"| 级别 | 数量 |")
-    lines.append(f"|------|------|")
+    lines.append("| 级别 | 数量 |")
+    lines.append("|------|------|")
     lines.append(f"| 🔴 严重 (连续失败≥{CONSECUTIVE_FAIL_THRESHOLD}次 或 失败率≥50%) | {len(critical)} |")
     lines.append(f"| 🟡 警告 (失败率≥{FAIL_RATE_THRESHOLD}% 且 失败≥{FAIL_THRESHOLD}次) | {len(warning)} |")
     lines.append(f"| 🔵 关注 (失败≥2次) | {len(info)} |")
@@ -350,7 +350,7 @@ def send_feishu_notification(critical, warning, info, days):
 
 
 def main():
-    print(f"=== CI重复失败检测 ===")
+    print("=== CI重复失败检测 ===")
     print(f"统计周期: 最近{DAYS}天")
     print(f"仓库: {REPO}")
     print()

scripts/ci_trigger_monitor.py

@@ -44,7 +44,7 @@ def api_get(path):
                 time.sleep(2**attempt)
                 continue
             raise
-        except Exception as e:
+        except Exception:
             if attempt < 2:
                 time.sleep(2**attempt)
                 continue
@@ -100,7 +100,7 @@ def send_alert(pr_num, pr_title, pr_url, head_sha, commit_age_min):
         print("  ⚠️  未配置CI_NOTIFY_WEBHOOK，跳过告警")
         return
 
-    gitea_url = get_env("GITEA_URL", "https://git.xiaoxiajianji.com")
+    get_env("GITEA_URL", "https://git.xiaoxiajianji.com")
 
     content = {
         "msg_type": "interactive",
@@ -202,7 +202,7 @@ def main():
 
         # 少于2分钟的跳过，给CI一点启动时间
         if age_min < 2:
-            print(f"  ⏳ 刚更新，等待CI启动...")
+            print("  ⏳ 刚更新，等待CI启动...")
             continue
 
         # 获取commit状态

scripts/init_tracker_direct.py

@@ -35,7 +35,6 @@ def init_database():
     """,
         ("认证与账号体系", "Phase 4", "2026-06-10", "2026-06-17", "completed", "JWT 登录、注册、密码管理"),
     )
-    milestone1_id = cursor.lastrowid
 
     auth_tasks = [
         ("JWT 工具类实现", "sign/verify/refresh Token 功能", "completed", "high"),

scripts/smoke_public_boundary_flow.py

@@ -44,7 +44,7 @@ def main() -> None:
     owner_headers = _register_login(owner, "owner")
     intruder_headers = _register_login(intruder, "intruder")
 
-    workspace = _json_or_raise(
+    _json_or_raise(
         "owner_workspace",
         owner.post(f"{BASE_URL}/workspaces", json={"name": "Boundary Workspace"}, headers=owner_headers, timeout=30),
     )

scripts/smoke_public_upload_flow.py

@@ -47,7 +47,7 @@ def main() -> None:
     )
     headers = {"Authorization": f"Bearer {login['access_token']}"}
 
-    workspace = _json_or_raise(
+    _json_or_raise(
         "workspace",
         session.post(f"{BASE_URL}/workspaces", json={"name": "Upload Smoke Workspace"}, headers=headers, timeout=30),
     )
@@ -75,7 +75,7 @@ def main() -> None:
             timeout=30,
         ),
     )
-    library_id = library["id"]
+    library["id"]
 
     upload = _json_or_raise(
         "upload",