v1.1.0: 实现核心业务逻辑（扫描/任务书/派发/状态机）

新增（scripts/ 分层完整实现）：
- scripts/util/{constants,date_util,runtime_paths,logging_setup}.py
- scripts/db/{connection,seed_data,repository}.py（SQLite + 5 张表 + 50 份样例合同）
- scripts/service/{scanner,task_generator,dispatcher,html_renderer}.py
- scripts/cli/app.py（argparse 子命令）
- scripts/templates/task.html.j2（Jinja2 渲染，无 jinja2 时降级到 str.replace）
- examples/{contracts_sample,performance_sample}.csv（本地样例数据）

修改：
- scripts/main.py：argparse + jiangchang_skill_core 降级
- SKILL.md：version 1.0.1 → 1.1.0
- CHANGELOG.md：加 v1.1.0 条目
- .env.example：加 DB_PATH / HTML_OUTPUT_DIR / JIANGCHANG_DATA_DIR

本地验证（9 个 CLI 命令全部 exit code = 0）：
- health / version / config-path / init-db：基础 4 命令
- scan-expiring-contracts --thresholds 90,60,30：42 份可续聘 → 红 10 / 橙 10 / 黄 10，生成 30 任务
- render-html：写 output/<task_id>.html（4.9 KB）
- generate-renewal-task：单份合同任务书生成
- mark-contract-renewed：状态机更新 + 关闭 open alerts
- dispatch-task-notice：按单位/月份派发 payload（dry-run 模式）

业务规则（AI 续聘建议本地版，规则顺序判断）：
1. 师德 < 60 → non_renew
2. 近 3 年考核有不合格（< 60）→ observe
3. 全部 >= 80 且逐年上升 → renew
4. 其他 → observe

Co-Authored-By: Claude Code <noreply@anthropic.com>

scripts/service/html_renderer.py

@@ -0,0 +1,114 @@
+"""HTML 报告渲染：Jinja2 模板 → 写 output/<task_id>.html。
+
+模板：scripts/templates/task.html.j2
+占位替换规则：
+- {{TITLE}}, {{TASK_ID}}, {{GENERATED_AT}}
+- {{TEACHER_NAME}}, {{EMPLOYEE_ID}}, {{UNIT_NAME}}, {{POSITION}}, {{CONTRACT_TYPE}}
+- {{CONTRACT_START}}, {{CONTRACT_END}}, {{DAYS_TO_EXPIRE}}, {{ALERT_LEVEL}}
+- {{PERFORMANCE_SUMMARY}}
+- {{SUGGESTION_CLASS}}, {{SUGGESTION_LABEL}}, {{SUGGESTION_REASON}}
+- {{DEADLINE}}, {{CHECKLIST_BODY}}
+"""
+
+from __future__ import annotations
+
+import json
+import sqlite3
+from datetime import date, datetime, timedelta
+from pathlib import Path
+
+from db import repository as repo
+from util.constants import ALERT_LEVEL_LABELS, SUGGESTION_LABELS
+from util.date_util import parse_iso_date
+from util.logging_setup import get_skill_logger
+from util.runtime_paths import get_output_dir, get_templates_dir
+
+logger = get_skill_logger()
+
+SUGGESTION_CLASS_MAP = {
+    "renew": "renew",
+    "observe": "observe",
+    "non_renew": "non-renew",
+}
+
+
+def render_task_html(conn: sqlite3.Connection, task_id: str) -> Path:
+    """渲染指定 task 为 HTML 文件，返回输出路径。
+
+    不存在 task → 抛 ValueError。
+    """
+    task = repo.get_task(conn, task_id)
+    if task is None:
+        raise ValueError(f"task_id={task_id!r} 不存在")
+
+    # 关联 alert 的 days_to_expire / level（用于显示）
+    alert = conn.execute(
+        "SELECT * FROM alerts WHERE alert_id = ?", (task["alert_id"],)
+    ).fetchone() if task["alert_id"] else None
+
+    days_to_expire = alert["days_to_expire"] if alert else None
+    alert_level = alert["alert_level"] if alert else "yellow"
+    alert_level_label = ALERT_LEVEL_LABELS.get(alert_level, alert_level)
+
+    # 截止日 = 合同到期日 - 30 天（教师备齐材料的最后期限）
+    contract_end = parse_iso_date(task["contract_end"])
+    deadline = (contract_end - timedelta(days=30)).isoformat()
+
+    # 模板上下文
+    checklist_items = json.loads(task["materials_checklist"]) if task["materials_checklist"] else []
+    checklist_html = "\n".join(
+        f'        <li><span class="box"></span>{item}</li>' for item in checklist_items
+    )
+
+    suggestion_class = SUGGESTION_CLASS_MAP.get(task["ai_suggestion"], "observe")
+    suggestion_label = SUGGESTION_LABELS.get(task["ai_suggestion"], task["ai_suggestion"])
+
+    ctx = {
+        "TITLE": "续聘准备任务书",
+        "TASK_ID": task_id,
+        "GENERATED_AT": task["generated_at"],
+        "TEACHER_NAME": task["teacher_name"],
+        "EMPLOYEE_ID": task["employee_id"],
+        "UNIT_NAME": task["unit_name"],
+        "POSITION": task["position"],
+        "CONTRACT_TYPE": task["contract_type"],
+        "CONTRACT_START": task["contract_start"],
+        "CONTRACT_END": task["contract_end"],
+        "DAYS_TO_EXPIRE": days_to_expire if days_to_expire is not None else "—",
+        "ALERT_LEVEL": alert_level_label,
+        "PERFORMANCE_SUMMARY": task["performance_summary"],
+        "SUGGESTION_CLASS": suggestion_class,
+        "SUGGESTION_LABEL": suggestion_label,
+        "SUGGESTION_REASON": task["suggestion_reason"],
+        "DEADLINE": deadline,
+        "CHECKLIST_BODY": checklist_html,
+    }
+
+    template_path = get_templates_dir() / "task.html.j2"
+    if not template_path.exists():
+        raise FileNotFoundError(f"模板不存在: {template_path}")
+
+    html = _render_template(template_path, ctx)
+
+    output_dir = get_output_dir()
+    output_dir.mkdir(parents=True, exist_ok=True)
+    output_path = output_dir / f"{task_id}.html"
+    output_path.write_text(html, encoding="utf-8")
+
+    logger.info("html_renderer: %s → %s", task_id, output_path)
+    return output_path
+
+
+def _render_template(template_path: Path, ctx: dict) -> str:
+    """用 Jinja2 渲染模板；本地无 jinja2 时降级到占位符替换。"""
+    template_text = template_path.read_text(encoding="utf-8")
+
+    try:
+        from jinja2 import Template
+
+        return Template(template_text).render(**ctx)
+    except ImportError:
+        # 降级：纯 str.replace（最简实现）
+        for k, v in ctx.items():
+            template_text = template_text.replace("{{" + k + "}}", str(v))
+        return template_text