feat: add admin routes, summarizer service, and CLI summarize command

- Add /admin routes for manual trigger and status inspection
- Add summarizer service with batch/single summary support
- Add summarize CLI command (single arxiv_id or batch pending)
- Register admin router in main app
- Add tests for summarizer

app/cli.py

@@ -49,6 +49,46 @@ def crawl(
         db.close()
 
 
+@cli_app.command()
+def summarize(
+    arxiv_id: str = typer.Argument(
+        None,
+        help="指定论文 arXiv ID；留空则批量处理所有 pending",
+    ),
+):
+    """手动触发 AI 总结。"""
+    from app.config import settings
+    from app.database import SessionLocal, engine
+    from app.models import init_db as _init
+    from app.services.summarizer import summarize_batch, summarize_single
+
+    import os
+    os.makedirs(settings.db_path.parent, exist_ok=True)
+    _init(engine)
+
+    db = SessionLocal()
+    try:
+        if arxiv_id:
+            typer.echo(f"🤖 开始总结 {arxiv_id} ...")
+            result = asyncio.run(summarize_single(db, arxiv_id))
+        else:
+            typer.echo("🤖 开始批量总结 pending 论文 ...")
+            result = asyncio.run(summarize_batch(db))
+
+        if result.get("status") in ("success", "done"):
+            typer.echo(f"✅ 总结完成：{result}")
+        elif result.get("status") == "conflict":
+            typer.echo("⚠️  已有批量总结任务在运行中", err=True)
+            raise typer.Exit(code=1)
+        elif result.get("status") == "not_found":
+            typer.echo(f"❌ 论文未找到：{arxiv_id}", err=True)
+            raise typer.Exit(code=1)
+        else:
+            typer.echo(f"⚠️  总结结果：{result}", err=True)
+    finally:
+        db.close()
+
+
 @cli_app.command()
 def init_db():
     """初始化数据库表。"""