feat(bilibili): support custom video covers

docs/CLI.md

@@ -81,7 +81,7 @@ SAU_XHS_CREATOR_BASE_URL=https://creator.rednote.com sau xiaohongshu login --acc
 ```bash
 sau bilibili login --account <account_name>
 sau bilibili check --account <account_name>
-sau bilibili upload-video --account <account_name> --file videos/demo.mp4 --title "示例标题" --desc "示例简介" --tid 249 --tags 足球,测试
+sau bilibili upload-video --account <account_name> --file videos/demo.mp4 --title "示例标题" --desc "示例简介" --tid 249 --tags 足球,测试 --thumbnail covers/demo.png
 ```
 
 补充说明：

sau_cli.py

@@ -145,6 +145,7 @@ class BilibiliVideoUploadRequest:
     tid: int
     tags: list[str]
     publish_date: datetime | int
+    thumbnail_file: Path | None = None
 
 
 @dataclass(slots=True)
@@ -501,6 +502,8 @@ async def upload_bilibili_video(request: BilibiliVideoUploadRequest) -> Path:
     ]
     if request.tags:
         arguments.extend(["--tag", ",".join(request.tags)])
+    if request.thumbnail_file:
+        arguments.extend(["--cover", str(request.thumbnail_file)])
     if isinstance(request.publish_date, datetime):
         arguments.extend(["--dtime", str(int(request.publish_date.timestamp()))])
 
@@ -680,6 +683,7 @@ def build_parser() -> argparse.ArgumentParser:
     bilibili_upload_video_parser.add_argument("--desc", required=True, help="Video description")
     bilibili_upload_video_parser.add_argument("--tid", required=True, type=int, help="Bilibili category id")
     bilibili_upload_video_parser.add_argument("--tags", default="", help="Comma-separated tags, such as tag1,tag2")
+    bilibili_upload_video_parser.add_argument("--thumbnail", type=existing_file_path, help="Optional Bilibili cover image path")
     bilibili_upload_video_parser.add_argument("--schedule", type=schedule_value, help=f"Schedule time in {schedule_help}")
 
     tencent_parser = platform_parsers.add_parser("tencent", help="Tencent/WeChat Channels operations")
@@ -926,6 +930,7 @@ async def dispatch(args: argparse.Namespace) -> int:
                 tid=args.tid,
                 tags=parse_tags(args.tags),
                 publish_date=args.schedule or 0,
+                thumbnail_file=args.thumbnail,
             )
             await upload_bilibili_video(request)
             print(f"Bilibili video upload submitted: {request.video_file}")

tests/test_sau_bilibili_cli.py

@@ -1,6 +1,9 @@
 import asyncio
+import tempfile
 import unittest
 from argparse import Namespace
+from pathlib import Path
+from types import SimpleNamespace
 from unittest.mock import AsyncMock, patch
 
 import sau_cli
@@ -43,3 +46,13 @@ class BilibiliCliTests(unittest.TestCase):
         self.assertFalse(result["success"])
         self.assertIn("local interactive terminal", result["message"].lower())
         self.assertIn("qrcode.png", result["message"].lower())
+
+    def test_upload_bilibili_video_passes_thumbnail_to_biliup(self):
+        with tempfile.TemporaryDirectory() as temp_dir:
+            account_file = Path(temp_dir) / "account.json"
+            account_file.write_text("{}", encoding="utf-8")
+            request = sau_cli.BilibiliVideoUploadRequest("creator", Path("demo.mp4"), "hello", "hello", 249, ["test"], 0, Path("cover.png"))
+            with patch("sau_cli.resolve_account_file", return_value=account_file), patch("sau_cli.run_biliup_command", return_value=SimpleNamespace(returncode=0, stdout="", stderr="")) as run_biliup:
+                asyncio.run(sau_cli.upload_bilibili_video(request))
+        self.assertIn("--cover", run_biliup.call_args.args[0])
+        self.assertIn("cover.png", run_biliup.call_args.args[0])