diff --git a/Dockerfile b/Dockerfile
index 1996a876..2b2d5299 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,9 @@
 FROM ghcr.io/astral-sh/uv:0.13-python3.14-alpine AS builder
 
 WORKDIR /app
-ENV UV_LINK_MODE=copy
+# 依赖与应用源码都预编译为 .pyc，容器冷启动不再逐个编译
+ENV UV_LINK_MODE=copy \
+    UV_COMPILE_BYTECODE=1
 
 # Install dependencies (cached layer)
 COPY backend/pyproject.toml backend/uv.lock ./
@@ -11,6 +13,7 @@ RUN uv sync --frozen --no-dev
 
 # Copy application source
 COPY backend/src ./src
+RUN .venv/bin/python -m compileall -q src
 
 
 FROM python:3.14-alpine AS runtime
diff --git a/backend/src/main.py b/backend/src/main.py
index 1d56c447..6d3976e0 100644
--- a/backend/src/main.py
+++ b/backend/src/main.py
@@ -1,19 +1,25 @@
+import asyncio
 import logging
 import os
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 from pathlib import Path
 
+import anyio
 import uvicorn
-from fastapi import APIRouter, Depends, FastAPI, Response
+from anyio.abc import TaskGroup, TaskStatus
+from fastapi import APIRouter, Depends, FastAPI, Request, Response
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.middleware.gzip import GZipMiddleware
 from fastapi.responses import FileResponse, HTMLResponse, RedirectResponse
 from starlette.routing import Route
+from starlette.types import ASGIApp, Receive, Scope, Send
 
 from module.api import v1
 from module.api.health import router as health_router
 from module.conf import VERSION, settings, setup_logger
 from module.core import AppContext
-from module.mcp import create_mcp_app, mcp
+from module.mcp.security import McpAccessMiddleware
 
 setup_logger(reset=True)
 logger = logging.getLogger(__name__)
@@ -46,14 +52,64 @@ async def lifespan(app: FastAPI):
         # supervised background task and returns immediately (CONTRACT #5),
         # so this does not block server startup.
         await ctx.start_tasks()
-    # 子应用不会运行自己的 lifespan，MCP 会话管理器在这里启动
-    async with app.state.mcp_sessions.run():
+    # 子应用不会运行自己的 lifespan，MCP 会话管理器在这里提供的任务组里运行
+    async with app.state.mcp.running():
         yield
     # Shutdown
     await ctx.stop()
     await ctx.plugins.stop()
 
 
+class _LazyMcpApp:
+    """首个通过访问控制的 /mcp 请求才导入 mcp 库、构建子应用并启动会话管理器。
+
+    多数用户不用 MCP，启动时不加载可省约 20 MB 内存。会话管理器的 run() 内含
+    anyio 任务组，必须在同一个任务里进出，所以它跑在 lifespan 持有的任务组里，
+    关停时随任务组取消。
+    """
+
+    def __init__(self, ctx: AppContext) -> None:
+        self._ctx = ctx
+        self._tasks: TaskGroup | None = None
+        self._app: ASGIApp | None = None
+        # 并发的首批请求只构建一次
+        self._lock = asyncio.Lock()
+
+    @asynccontextmanager
+    async def running(self) -> AsyncIterator[None]:
+        async with anyio.create_task_group() as tasks:
+            self._tasks = tasks
+            yield
+            tasks.cancel_scope.cancel()
+        # 每次 create_mcp_app 都新建会话管理器，再次启动时重新构建
+        self._tasks = self._app = None
+
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
+        if self._app is None:
+            async with self._lock:
+                if self._app is None:
+                    self._app = await self._build()
+        await self._app(scope, receive, send)
+
+    async def _build(self) -> ASGIApp:
+        if self._tasks is None:
+            raise RuntimeError("MCP 只能在应用 lifespan 运行期间使用")
+        from module.mcp import create_mcp_app, mcp
+
+        app = create_mcp_app(self._ctx)
+        manager = mcp.session_manager
+
+        async def serve(
+            *, task_status: TaskStatus[None] = anyio.TASK_STATUS_IGNORED
+        ) -> None:
+            async with manager.run():
+                task_status.started()
+                await anyio.sleep_forever()
+
+        await self._tasks.start(serve)
+        return app
+
+
 def create_app() -> FastAPI:
     ctx = AppContext.build(settings)
     app = FastAPI(lifespan=lifespan)
@@ -67,6 +123,9 @@ def create_app() -> FastAPI:
         allow_headers=["*"],
     )
 
+    # SSE（text/event-stream）由中间件默认排除，不会被压缩缓冲
+    app.add_middleware(GZipMiddleware, minimum_size=1000)
+
     # mount routers
     app.include_router(v1, prefix="/api")
 
@@ -75,10 +134,10 @@ def create_app() -> FastAPI:
     app.include_router(health_router)
 
     # MCP 服务（Streamable HTTP）：用路由而不是 mount，端点才是 /mcp 本身
-    # （mount 只匹配 /mcp/...，/mcp 会被 307 重定向到 /mcp/）
-    app.router.routes.append(Route("/mcp", endpoint=create_mcp_app(ctx)))
-    # 每次 create_mcp_app 都新建会话管理器，记下本应用的这一个供 lifespan 运行
-    app.state.mcp_sessions = mcp.session_manager
+    # （mount 只匹配 /mcp/...，/mcp 会被 307 重定向到 /mcp/）。访问控制在
+    # 延迟构建之前，被拒的请求不会加载 mcp 库
+    app.state.mcp = _LazyMcpApp(ctx)
+    app.router.routes.append(Route("/mcp", endpoint=McpAccessMiddleware(app.state.mcp)))
 
     return app
 
@@ -99,14 +158,24 @@ def posters(path: str):
 
 # 前端插件组件与宿主同源（第 3.8 节），只允许加载本站脚本：远程脚本与内联脚本
 # 都被拒绝。只加在前端静态文件上，/docs 的 Swagger 页面依赖内联脚本与 CDN。
-def _spa_csp(response: Response) -> None:
+def _spa_headers(request: Request, response: Response) -> None:
     response.headers["Content-Security-Policy"] = "script-src 'self'"
+    # 入口 HTML（含回落到 index.html 的前端路由深链接，即末段无扩展名的路径）
+    # 必须每次校验，否则会引用已不存在的旧哈希文件；assets/ 下的文件名带内容
+    # 哈希，可永久缓存。fonts/、images/ 等不带哈希，不设置。只看路径段，
+    # 带 root_path 前缀时同样适用。
+    path = request.url.path
+    last = path.rsplit("/", 1)[-1]
+    if "." not in last or last.endswith(".html"):
+        response.headers["Cache-Control"] = "no-cache"
+    elif "/assets/" in path:
+        response.headers["Cache-Control"] = "public, max-age=31536000, immutable"
 
 
 def mount_webui(app: FastAPI, dist: Path) -> None:
     # 前端路由优先级最低，只在没有路径操作或挂载匹配时生效；浏览器导航
     # （Accept: text/html）到不存在的路径时回落到 index.html，其它请求返回 404
-    web = APIRouter(dependencies=[Depends(_spa_csp)])
+    web = APIRouter(dependencies=[Depends(_spa_headers)])
     web.frontend("/", directory=dist)
     app.include_router(web)
 
diff --git a/backend/src/module/api/events.py b/backend/src/module/api/events.py
index ab18216b..dc6d5e79 100644
--- a/backend/src/module/api/events.py
+++ b/backend/src/module/api/events.py
@@ -3,7 +3,13 @@
 
 单个连接按 tick 节拍分别推送 status/downloader/log/update，节拍与原轮询间隔
 保持一致，前端订阅失败时回退到原有轮询逻辑。这几类是「状态快照」而非事件，
-仍按节拍采样。
+仍按节拍采样，但只推变化：
+
+- downloader：所有连接共用一份 5s 缓存查询下载器；连接建立时推一帧，之后
+  仅在负载与本连接上次推送的不同时才推。
+- log：连接建立时、以及日志被轮转/截断后推整段尾部（``log``，日志为空时推
+  ``log_clear``）；其余只推上次之后新增的完整行（``log_append``，总以换行
+  结尾），没有新增不推。
 
 notification（通知中心未读数）由事件驱动：每个连接在插件事件总线上订阅
 ``inbox.changed``（通知中心写入/已读/删除时发布），收到后立即查库推送，
@@ -17,6 +23,8 @@ import asyncio
 import dataclasses
 import json
 import logging
+import os
+import time
 from collections import deque
 from collections.abc import AsyncIterator
 
@@ -24,6 +32,7 @@ from fastapi import APIRouter, Depends, Request
 from fastapi.sse import EventSourceResponse, ServerSentEvent
 
 from ab_sdk import Event
+from module.api import log as log_api
 from module.api.deps import get_context
 from module.api.log import _read_log_tail
 from module.conf import LOG_PATH, VERSION
@@ -55,6 +64,9 @@ _LOG_EVERY = 10
 # 取值需明显小于 downloader 的 5s 推送间隔。
 _DOWNLOADER_TIMEOUT_SECONDS = 3.0
 
+# 下载器种子列表的共享缓存有效期（秒）：所有 SSE 连接合计每 5s 最多查询一次
+_DOWNLOADER_CACHE_SECONDS = 5.0
+
 # 单个连接最多积压的待转发总线事件数
 _FORWARD_BACKLOG = 200
 
@@ -87,12 +99,91 @@ async def _notification_payload() -> dict:
         }
 
 
-async def _log_payload() -> str | None:
-    """读取日志尾部；日志文件不存在时返回 None（跳过本次推送）。"""
-    if not LOG_PATH.exists():
-        return None
-    data = await asyncio.to_thread(_read_log_tail)
-    return data.decode("utf-8", errors="replace")
+class _TorrentCache:
+    """所有 SSE 连接共用的种子列表缓存（已编码为 JSON）。
+
+    锁保证并发连接同一时刻只查一次下载器；时间戳记在查询开始时，
+    连接按约 5s 的节拍来取时不会拿到隔一轮的旧数据。
+    """
+
+    def __init__(self) -> None:
+        self._lock = asyncio.Lock()
+        self._fetched_at = -_DOWNLOADER_CACHE_SECONDS
+        self._data: str | None = None
+
+    async def get(self) -> str:
+        async with self._lock:
+            now = time.monotonic()
+            if (
+                self._data is None
+                or now - self._fetched_at >= _DOWNLOADER_CACHE_SECONDS
+            ):
+                # 查询被取消（持锁的连接断开）时不更新时间戳，下一个连接重新查询
+                self._data = json.dumps(await _downloader_payload())
+                self._fetched_at = now
+            return self._data
+
+
+_torrents = _TorrentCache()
+
+
+class _LogCursor:
+    """一个 SSE 连接的日志读取位置。
+
+    首帧及日志被轮转（inode 变化）、截断（大小小于已读偏移）、mtime 回退或
+    经 /log/clear 清空（清空计数变化）时推整段尾部 ``log``（为空时推
+    ``log_clear``）；否则只推偏移
+    之后新增的完整行 ``log_append``。增量截到最后一个换行：不切断多字节
+    字符，且每帧都是完整行，前端可直接追加。
+    """
+
+    def __init__(self) -> None:
+        self._ino: int | None = None
+        self._mtime_ns = 0
+        self._offset = 0
+        self._generation = -1
+
+    def _read(self) -> dict | None:
+        try:
+            st = os.stat(LOG_PATH)
+            generation = log_api._clear_generation
+            if (
+                generation == self._generation
+                and st.st_ino == self._ino
+                and st.st_size >= self._offset
+                and st.st_mtime_ns >= self._mtime_ns
+            ):
+                self._mtime_ns = st.st_mtime_ns
+                if st.st_size == self._offset:
+                    return None
+                with open(LOG_PATH, "rb") as f:
+                    f.seek(self._offset)
+                    data = f.read(st.st_size - self._offset)
+                data = data[: data.rfind(b"\n") + 1]
+                if not data:
+                    return None
+                self._offset += len(data)
+                event = "log_append"
+            else:
+                data, offset = _read_log_tail()
+                self._ino, self._mtime_ns, self._offset, self._generation = (
+                    st.st_ino,
+                    st.st_mtime_ns,
+                    offset,
+                    generation,
+                )
+                event = "log"
+                if not data:
+                    # EventSource 不派发 data 为空的事件：空日志改推 log_clear，
+                    # 别的标签页清空后、或清空后重连时前端才不会残留旧日志
+                    event, data = "log_clear", b"1"
+        except FileNotFoundError:
+            # 尚未创建，或正处于轮转改名的间隙：本轮跳过
+            return None
+        return {"event": event, "data": data.decode("utf-8", errors="replace")}
+
+    async def frame(self) -> dict | None:
+        return await asyncio.to_thread(self._read)
 
 
 class _InboxWatch:
@@ -175,8 +266,10 @@ async def _event_generator(request: Request, ctx: AppContext):
     """按各自节拍推送 status/downloader/log 事件、按需推送 notification 的核心循环。"""
     loop = asyncio.get_running_loop()
     inbox = _InboxWatch()
+    log = _LogCursor()
     tick = 0
     last_update: str | None = None
+    last_downloader: str | None = None
     try:
         while True:
             if await request.is_disconnected():
@@ -197,13 +290,15 @@ async def _event_generator(request: Request, ctx: AppContext):
             if tick % _DOWNLOADER_EVERY == 0:
                 # 不可用时推送 null 而非跳过，前端据此感知下载器降级状态
                 # （store/downloader.ts 对 null 保留旧数据，不会崩溃）。
-                torrents = await _downloader_payload()
-                yield {"event": "downloader", "data": json.dumps(torrents)}
+                torrents = await _torrents.get()
+                if torrents != last_downloader:
+                    last_downloader = torrents
+                    yield {"event": "downloader", "data": torrents}
 
             if tick % _LOG_EVERY == 0:
-                log_text = await _log_payload()
-                if log_text is not None:
-                    yield {"event": "log", "data": log_text}
+                log_frame = await log.frame()
+                if log_frame is not None:
+                    yield log_frame
 
             # 通知中心：连接建立时的初始帧，以及此前查库失败后的重试
             frame = await inbox.frame()
diff --git a/backend/src/module/api/log.py b/backend/src/module/api/log.py
index 5600444c..5e6482f5 100644
--- a/backend/src/module/api/log.py
+++ b/backend/src/module/api/log.py
@@ -16,11 +16,12 @@ router = APIRouter(
 _TAIL_BYTES = 512 * 1024  # 512 KB
 
 
-def _read_file_tail(path: Path, budget: int) -> tuple[bytes, bool]:
+def _read_file_tail(path: Path, budget: int) -> tuple[bytes, bool, int]:
     """同步读取单个文件的最后 budget 字节（掐掉开头的半行）。
 
-    返回 (数据, 是否截断)。文件在 stat 与 open 之间被轮转改名时按
-    空文件处理——抛异常会炸掉 GET /log 与整条 SSE 流。
+    返回 (数据, 是否截断, 读到的文件末尾偏移)。末尾偏移供 SSE 作为增量读取的
+    起点。文件在 stat 与 open 之间被轮转改名时按空文件处理——抛异常会炸掉
+    GET /log 与整条 SSE 流。
     """
     try:
         with open(path, "rb") as f:
@@ -29,52 +30,63 @@ def _read_file_tail(path: Path, budget: int) -> tuple[bytes, bool]:
             if size > budget:
                 f.seek(-budget, 2)
                 data = f.read()
+                end = f.tell()
                 # Drop first partial line
                 idx = data.find(b"\n")
                 if idx != -1:
                     data = data[idx + 1 :]
-                return data, True
+                return data, True, end
             f.seek(0)
-            return f.read(), False
+            data = f.read()
+            return data, False, f.tell()
     except FileNotFoundError:
-        return b"", False
+        return b"", False, 0
 
 
-def _read_log_tail() -> bytes:
+def _read_log_tail() -> tuple[bytes, int]:
     """读取日志尾部，供 asyncio.to_thread 在线程池中执行。
 
     轮转（RotatingFileHandler / 启动轮转）刚发生后 log.txt 近乎为空；
     仅当 log.txt 完整读入（未截断）且预算有剩时，把 log.txt.1 的尾部
     拼在前面，UI 不出现"日志突然清空"的断崖。截断读取时绝不拼接：
     中间内容已缺失，再贴更旧的备份会造成时间倒跳的假象。
+
+    返回 (数据, log.txt 读到的末尾偏移)。
     """
-    data, truncated = _read_file_tail(LOG_PATH, _TAIL_BYTES)
+    data, truncated, end = _read_file_tail(LOG_PATH, _TAIL_BYTES)
     if truncated:
-        return data
+        return data, end
     remaining = _TAIL_BYTES - len(data)
     if remaining > 0:
-        backup_data, _ = _read_file_tail(
+        backup_data, _, _ = _read_file_tail(
             LOG_PATH.with_name(f"{LOG_PATH.name}.1"), remaining
         )
         data = backup_data + data
-    return data
+    return data, end
 
 
 @router.get("", response_model=str)
 async def get_log():
     if LOG_PATH.exists():
         # Up to 512 KB of sync file I/O; keep it off the event loop.
-        data = await asyncio.to_thread(_read_log_tail)
+        data, _ = await asyncio.to_thread(_read_log_tail)
         return Response(data, media_type="text/plain")
     else:
         return Response("Log file not found", status_code=404)
 
 
+# 日志清空次数。原地截断后若在 SSE 下次读取前又长过旧偏移，大小比较发现不了；
+# SSE 的读取游标比对这个计数，变化时重推整段
+_clear_generation = 0
+
+
 def _clear_log_files() -> None:
     """清空日志并删除轮转备份，否则拼接读取会把旧内容带回来。"""
+    global _clear_generation
     LOG_PATH.write_text("")
     for backup in LOG_PATH.parent.glob(f"{LOG_PATH.name}.*"):
         backup.unlink(missing_ok=True)
+    _clear_generation += 1
 
 
 @router.post("/clear", response_model=APIResponse)
diff --git a/backend/src/module/api/passkey.py b/backend/src/module/api/passkey.py
index c8cf3910..bcaf7d24 100644
--- a/backend/src/module/api/passkey.py
+++ b/backend/src/module/api/passkey.py
@@ -30,7 +30,6 @@ from module.security.api import (
     require_session_principal,
 )
 from module.security.auth_strategy import PasskeyAuthStrategy
-from module.security.webauthn import get_webauthn_service
 
 logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/passkey", tags=["passkey"])
@@ -56,6 +55,9 @@ def _get_webauthn_from_request(request: Request):
     """
     from urllib.parse import urlparse
 
+    # webauthn 库较重（约 11 MB），只在用到 Passkey 时导入
+    from module.security.webauthn import get_webauthn_service
+
     origin = settings.security.webauthn_origin
     if not origin:
         origin = request.headers.get("origin", "")
diff --git a/backend/src/module/conf/log.py b/backend/src/module/conf/log.py
index 3df327a6..76f32836 100644
--- a/backend/src/module/conf/log.py
+++ b/backend/src/module/conf/log.py
@@ -86,6 +86,9 @@ def setup_logger(level: int = logging.INFO, reset: bool = False):
     logging.basicConfig(
         level=level,
         handlers=[queue_handler],
+        # 先导入的第三方库（如 mcp）可能已让根日志器带上处理器，
+        # 此时 basicConfig 会静默跳过，日志文件就收不到任何内容
+        force=True,
     )
 
     # 压低 HTTP 请求日志：httpx2 是本项目的客户端；google-genai 与 mcp 仍依赖旧 httpx
diff --git a/backend/src/module/core/loops.py b/backend/src/module/core/loops.py
index da405e96..78659476 100644
--- a/backend/src/module/core/loops.py
+++ b/backend/src/module/core/loops.py
@@ -25,29 +25,8 @@ async def rss_tick(analyser: RSSAnalyser, notifier: NotificationManager) -> None
     """Analyse aggregate RSS feeds and refresh the RSS engine once."""
     async with DownloaderPool() as downloaders:
         async with Database() as db:
-            engine = RSSEngine(db)
-            # Analyse RSS
-            rss_list = await db.rss.search_aggregate()
-            for rss in rss_list:
-                try:
-                    await analyser.rss_to_data(rss, engine)
-                except Exception:
-                    # 仅当该 RSS 确实已在遍历期间被 API 删除时才视为预期情况；
-                    # 其余异常可能是真实 bug，需在 WARNING 级别带完整堆栈。
-                    if await db.rss.search_id(rss.id) is None:
-                        logger.debug(
-                            "Skipping RSS id=%s, deleted during iteration",
-                            rss.id,
-                        )
-                    else:
-                        logger.warning(
-                            "Error analysing RSS id=%s (%s)",
-                            rss.id,
-                            rss.url,
-                            exc_info=True,
-                        )
-            # Run RSS Engine
-            events = await engine.refresh_rss(downloaders)
+            # 每个订阅本轮只拉取一次，聚合分析与下载匹配共用结果（#1026）
+            events = await RSSEngine(db).refresh_rss(downloaders, analyser=analyser)
     if events:
         # 站内通知中心要求事件总是送达 notifier（send_event 内部先落库，
         # 再按 settings.notification.enable 决定是否外发）。
diff --git a/backend/src/module/database/bangumi.py b/backend/src/module/database/bangumi.py
index 97ec7472..c5a5be96 100644
--- a/backend/src/module/database/bangumi.py
+++ b/backend/src/module/database/bangumi.py
@@ -601,8 +601,15 @@ class BangumiDatabase:
         result = await self.session.execute(statement)
         return list(result.scalars().all())
 
-    async def match_list(self, torrent_list: list, rss_link: str) -> list:
-        match_datas = await self.search_all()
+    async def match_list(
+        self,
+        torrent_list: list,
+        rss_link: str,
+        match_datas: list[Bangumi] | None = None,
+    ) -> list:
+        # 调用方可传入本轮已加载的番剧列表，省去每次 search_all
+        if match_datas is None:
+            match_datas = await self.search_all()
         if not match_datas:
             return torrent_list
 
diff --git a/backend/src/module/database/rename_operation.py b/backend/src/module/database/rename_operation.py
index f44e2311..9a6a24e2 100644
--- a/backend/src/module/database/rename_operation.py
+++ b/backend/src/module/database/rename_operation.py
@@ -63,7 +63,7 @@ class RenameOperationDatabase:
             RenameOperation.target_path == target_path,
         )
         if active_only:
-            statement = statement.where(RenameOperation.state != "done")
+            statement = statement.where(col(RenameOperation.state).not_in(["done"]))
         statement = statement.order_by(  # type: ignore[assignment]
             col(RenameOperation.updated_at).desc()
         )
diff --git a/backend/src/module/database/rss.py b/backend/src/module/database/rss.py
index 2316ab26..740131dd 100644
--- a/backend/src/module/database/rss.py
+++ b/backend/src/module/database/rss.py
@@ -116,12 +116,6 @@ class RSSDatabase:
         result = await self.session.execute(select(RSSItem).where(RSSItem.enabled))
         return list(result.scalars().all())
 
-    async def search_aggregate(self) -> list[RSSItem]:
-        result = await self.session.execute(
-            select(RSSItem).where(and_(RSSItem.aggregate, RSSItem.enabled))
-        )
-        return list(result.scalars().all())
-
     async def delete(self, _id: int) -> bool:
         try:
             # 先删除引用该 RSS 的 torrent，避免外键约束报错
diff --git a/backend/src/module/database/torrent.py b/backend/src/module/database/torrent.py
index ed532653..130a4e2a 100644
--- a/backend/src/module/database/torrent.py
+++ b/backend/src/module/database/torrent.py
@@ -5,7 +5,7 @@ from sqlalchemy import delete, func
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlmodel import and_, select, true
 
-from module.models import Torrent
+from module.models import Bangumi, RSSItem, Torrent
 
 logger = logging.getLogger(__name__)
 
@@ -47,13 +47,31 @@ class TorrentDatabase:
         )
         return list(result.scalars().all())
 
-    async def check_new(self, torrents_list: list[Torrent]) -> list[Torrent]:
+    async def check_new(
+        self, torrents_list: list[Torrent], rss: RSSItem | None = None
+    ) -> list[Torrent]:
+        """返回库中没有记录的种子。
+
+        给出 ``rss`` 时只看该订阅已匹配、且所属番剧的 ``rss_link`` 已包含该
+        订阅当前 URL 的记录（与 BangumiDatabase.match_list 的追加判断一致）：
+        未匹配的孤儿每轮仍要重新分析，新番或上次分析失败的种子才能生成规则；
+        订阅改了 URL 时仍要匹配，才能把新 URL 追加到 rss_link（#1053）。
+        """
         if not torrents_list:
             return []
         urls = [t.url for t in torrents_list]
         # SQLModel 类属性在 mypy 看来是普通字段类型而非 InstrumentedAttribute，
         # 无法识别 .in_()/.is_() 等查询方法（无官方 mypy 插件支持）。
         statement = select(Torrent.url).where(Torrent.url.in_(urls))  # type: ignore[attr-defined]
+        if rss is not None:
+            # instr 区分大小写，与 Python 的 ``in`` 一致（LIKE 不区分）
+            statement = statement.join(
+                Bangumi,
+                Bangumi.id == Torrent.bangumi_id,  # type: ignore[arg-type]
+            ).where(
+                Torrent.rss_id == rss.id,
+                func.instr(Bangumi.rss_link, rss.url) > 0,
+            )
         result = await self.session.execute(statement)
         existing_urls = set(result.scalars().all())
         return [t for t in torrents_list if t.url not in existing_urls]
diff --git a/backend/src/module/mcp/__init__.py b/backend/src/module/mcp/__init__.py
index 7a994017..bff6b396 100644
--- a/backend/src/module/mcp/__init__.py
+++ b/backend/src/module/mcp/__init__.py
@@ -8,9 +8,24 @@ Usage::
     from module.mcp import create_mcp_app
 
     app = create_mcp_app(ctx)  # returns a Starlette ASGI app, route it at /mcp
+
+``mcp`` 与 ``create_mcp_app`` 在首次访问时才导入（mcp 库较重）：main 启动时
+只用到 ``module.mcp.security``，不加载 mcp 库。
 """
 
-# 导入即注册内置工具与资源
-from . import resources, tools  # noqa: F401
-from .server import create_mcp_starlette_app as create_mcp_app
-from .server import mcp
+from typing import TYPE_CHECKING, Any
+
+if TYPE_CHECKING:
+    from .server import create_mcp_starlette_app as create_mcp_app
+    from .server import mcp
+
+
+def __getattr__(name: str) -> Any:
+    if name not in ("mcp", "create_mcp_app"):
+        raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+    # 导入即注册内置工具与资源
+    from . import resources, tools  # noqa: F401
+    from .server import create_mcp_starlette_app, mcp
+
+    globals().update(mcp=mcp, create_mcp_app=create_mcp_starlette_app)
+    return globals()[name]
diff --git a/backend/src/module/mcp/server.py b/backend/src/module/mcp/server.py
index b998aaa1..d7e59c0b 100644
--- a/backend/src/module/mcp/server.py
+++ b/backend/src/module/mcp/server.py
@@ -28,7 +28,6 @@ from .plugins import (
     read_plugin_resource,
 )
 from .runtime import set_context
-from .security import McpAccessMiddleware
 
 logger = logging.getLogger(__name__)
 
@@ -98,8 +97,8 @@ def create_mcp_starlette_app(ctx=None) -> Starlette:
     新建会话管理器，调用方须在应用 lifespan 中运行 ``mcp.session_manager.run()``。
 
     ``ctx`` is the application :class:`AppContext`; it is stored so status
-    tools/resources can report live program state. ``McpAccessMiddleware`` is
-    applied to enforce configurable IP whitelist and bearer token access control.
+    tools/resources can report live program state. 访问控制
+    （``McpAccessMiddleware``）由 ``main.py`` 套在 /mcp 路由外层，先于本函数生效。
     """
     set_context(ctx)
     app = mcp.streamable_http_app(
@@ -111,5 +110,4 @@ def create_mcp_starlette_app(ctx=None) -> Starlette:
             enable_dns_rebinding_protection=False
         ),
     )
-    app.add_middleware(McpAccessMiddleware)
     return app
diff --git a/backend/src/module/parser/analyser/tmdb_parser.py b/backend/src/module/parser/analyser/tmdb_parser.py
index 83359339..9917aa45 100644
--- a/backend/src/module/parser/analyser/tmdb_parser.py
+++ b/backend/src/module/parser/analyser/tmdb_parser.py
@@ -4,6 +4,7 @@ import re
 import time
 from collections import OrderedDict
 from dataclasses import dataclass
+from typing import Any
 from urllib.parse import urlencode
 
 from module.conf import TMDB_API, settings
@@ -26,7 +27,11 @@ def _api_key() -> str:
 
 # In-memory cache for TMDB lookups to avoid repeated API calls
 _TMDB_CACHE_MAX = 512
-_tmdb_cache: OrderedDict[str, "TMDBInfo | None"] = OrderedDict()
+# 否定/回退结果（无匹配、回退到电影）的存活时间：既避免对同一个查不到的标题
+# 反复请求 TMDB，又不让一次临时故障把标题永久毒化
+_TMDB_NEGATIVE_TTL = 6 * 3600.0
+# 值为 (过期的 monotonic 时刻, 结果)；inf 表示不过期
+_tmdb_cache: OrderedDict[str, "tuple[float, TMDBInfo | None]"] = OrderedDict()
 
 
 def reset_cache() -> None:
@@ -64,6 +69,18 @@ class TMDBInfo:
 LANGUAGE = {"zh": "zh-CN", "jp": "ja-JP", "en": "en-US"}
 
 
+class _TMDBRequestFailed(Exception):
+    """TMDB 请求失败（网络错误、5xx、重试耗尽的 429 等），区别于「无匹配」。"""
+
+
+async def _get_json(req: RequestContent, url: str) -> Any:
+    """get_json 返回 None 表示请求失败：抛出，让本次查询整体作废且不缓存。"""
+    contents = await req.get_json(url)
+    if contents is None:
+        raise _TMDBRequestFailed(url)
+    return contents
+
+
 def search_url(e, key="zh"):
     query = urlencode(
         {
@@ -100,7 +117,7 @@ def season_url(tv_id, season_number, key):
 
 async def is_animation(tv_id, language, req: RequestContent) -> bool:
     url_info = info_url(tv_id, language)
-    type_id = await req.get_json(url_info)
+    type_id = await _get_json(req, url_info)
     if type_id:
         for type in type_id.get("genres", []):
             if type.get("id") == 16:
@@ -200,12 +217,12 @@ async def _search_movie(
     电影没有季度概念，因此不复用剧集的季度/集数聚合逻辑，仅返回标题、原名、
     年份与海报等基本信息。"""
     url = search_movie_url(title, language)
-    contents = await req.get_json(url)
-    results = (contents or {}).get("results") or []
+    contents = await _get_json(req, url)
+    results = contents.get("results") or []
     if not results:
         url = search_movie_url(title.replace(" ", ""), language)
-        contents = await req.get_json(url)
-        results = (contents or {}).get("results") or []
+        contents = await _get_json(req, url)
+        results = contents.get("results") or []
     if not results:
         return None
     movie = results[0]
@@ -234,26 +251,48 @@ async def tmdb_parser(
     # URL instead of a locally-saved one, so mixing the two would poison
     # whichever caller queries second.
     cache_key = f"{title}:{language}:{test}:{is_movie}"
-    if cache_key in _tmdb_cache:
-        return _tmdb_cache[cache_key]
+    hit = _tmdb_cache.get(cache_key)
+    if hit is not None:
+        if hit[0] > time.monotonic():
+            _tmdb_cache.move_to_end(cache_key)
+            return hit[1]
+        del _tmdb_cache[cache_key]
 
+    try:
+        result = await _tmdb_lookup(title, language, test, is_movie)
+    except _TMDBRequestFailed as e:
+        # 临时故障不写缓存，下次照常查询
+        logger.warning("TMDB request failed for %s: %s", title, e)
+        return None
+    # 剧集结果的 season 非空；None 与电影回退（season=[]）都按否定结果限时缓存
+    expires = (
+        time.monotonic() + _TMDB_NEGATIVE_TTL
+        if result is None or not result.season
+        else float("inf")
+    )
+    _tmdb_cache[cache_key] = (expires, result)
+    _tmdb_cache.move_to_end(cache_key)
+    if len(_tmdb_cache) > _TMDB_CACHE_MAX:
+        _tmdb_cache.popitem(last=False)
+    return result
+
+
+async def _tmdb_lookup(title, language, test: bool, is_movie: bool) -> TMDBInfo | None:
     async with RequestContent() as req:
         if is_movie:
             # 已知是电影/剧场版，直接查询 search/movie，跳过剧集搜索
-            result = await _search_movie(title, language, req)
-            _tmdb_cache[cache_key] = result
-            return result
+            return await _search_movie(title, language, req)
         url = search_url(title, language)
-        contents = await req.get_json(url)
+        contents = await _get_json(req, url)
         if not contents:
             return await _search_movie(title, language, req)
-        contents = (contents or {}).get("results") or []
+        contents = contents.get("results") or []
         if not contents:
             url = search_url(title.replace(" ", ""), language)
-            contents_resp = await req.get_json(url)
+            contents_resp = await _get_json(req, url)
             if not contents_resp:
                 return await _search_movie(title, language, req)
-            contents = (contents_resp or {}).get("results") or []
+            contents = contents_resp.get("results") or []
             if not contents:
                 # search/tv 无结果：回退到 search/movie (剧场版等)
                 return await _search_movie(title, language, req)
@@ -266,12 +305,10 @@ async def tmdb_parser(
                     matched_id = cid
                     break
             if matched_id is None:
-                # search/tv 有结果但都不是动画：回退到 search/movie (剧场版等)。
-                # Don't cache the negative result permanently — a temporary
-                # TMDB hiccup shouldn't poison this title for the process lifetime.
+                # search/tv 有结果但都不是动画：回退到 search/movie (剧场版等)
                 return await _search_movie(title, language, req)
             url_info = info_url(matched_id, language)
-            info_content = await req.get_json(url_info)
+            info_content = await _get_json(req, url_info)
             season = [
                 {
                     "season": s.get("name"),
@@ -355,13 +392,8 @@ async def tmdb_parser(
                     virtual_season_starts if virtual_season_starts else None
                 ),
             )
-            if len(_tmdb_cache) >= _TMDB_CACHE_MAX:
-                _tmdb_cache.popitem(last=False)
-            _tmdb_cache[cache_key] = result
             return result
         else:
-            # No results at all — don't cache the negative result permanently,
-            # see the matched_id is None case above.
             return None
 
 
diff --git a/backend/src/module/rss/analyser.py b/backend/src/module/rss/analyser.py
index 516805e6..93d9471a 100644
--- a/backend/src/module/rss/analyser.py
+++ b/backend/src/module/rss/analyser.py
@@ -114,28 +114,36 @@ class RSSAnalyser:
         return None
 
     async def rss_to_data(
-        self, rss: RSSItem, engine: RSSEngine, full_parse: bool = True
+        self,
+        rss: RSSItem,
+        torrents: list[Torrent],
+        engine: RSSEngine,
+        bangumi_list: list[Bangumi],
     ) -> list[Bangumi]:
+        """用本轮已拉取的 ``torrents`` 为聚合订阅生成新规则。
+
+        ``bangumi_list`` 是本轮已加载的番剧列表，避免每个订阅各查一次。
+        """
         # One RSS workflow can cross several await boundaries and parse the
         # same resource during Movie match, Bangumi match, and persistence.
         # Keep those stages on the engine selected when the workflow started.
         with parser_engine_snapshot():
-            rss_torrents = await self.get_rss_torrents(rss.url, full_parse)
+            # 只跳过追加 rss_link 已是空操作的种子：其他订阅已知、或本订阅
+            # 改过 URL 的种子仍要匹配，才能把当前 URL 追加到 rss_link（#1053）
+            torrents = await engine.db.torrent.check_new(torrents, rss=rss)
+            if not torrents:
+                return []
             # Filter out already-known movies first
-            torrents_after_movies = await engine.db.movie.match_list(
-                rss_torrents, rss.url
-            )
+            torrents_after_movies = await engine.db.movie.match_list(torrents, rss.url)
             # Then filter out already-known bangumi
             torrents_to_add = await engine.db.bangumi.match_list(
-                torrents_after_movies, rss.url
+                torrents_after_movies, rss.url, bangumi_list
             )
             if not torrents_to_add:
                 logger.debug("No new title has been found.")
                 return []
             # Parse remaining torrents
-            new_bangumi, new_movies = await self.torrents_to_data(
-                torrents_to_add, rss, full_parse
-            )
+            new_bangumi, new_movies = await self.torrents_to_data(torrents_to_add, rss)
             for movie in new_movies:
                 await engine.db.movie.add(movie)
             if new_bangumi:
diff --git a/backend/src/module/rss/engine.py b/backend/src/module/rss/engine.py
index 5cb30579..e4210546 100644
--- a/backend/src/module/rss/engine.py
+++ b/backend/src/module/rss/engine.py
@@ -3,7 +3,7 @@ import logging
 import re
 from collections import defaultdict
 from datetime import datetime, timezone
-from typing import Optional
+from typing import TYPE_CHECKING, Optional
 from urllib.parse import urlparse
 
 from ab_sdk import points
@@ -40,6 +40,9 @@ from module.parser.title_parser import _apply_title_hooks
 from module.plugin import host as plugin_host
 from module.plugin.views import bangumi_info, torrent_info
 
+if TYPE_CHECKING:
+    from .analyser import RSSAnalyser
+
 logger = logging.getLogger(__name__)
 
 # Delay between consecutive requests to the same host. Firing all feeds of one
@@ -162,16 +165,12 @@ class RSSEngine:
             msg_zh="删除 RSS 成功。",
         )
 
-    async def pull_rss(self, rss_item: RSSItem) -> list[Torrent]:
-        torrents = await self._get_torrents(rss_item)
-        new_torrents = await self.db.torrent.check_new(torrents)
-        return new_torrents
-
     async def _pull_rss_with_status(
         self, rss_item: RSSItem
     ) -> tuple[list[Torrent], Optional[str]]:
+        """拉取订阅的全部条目（不去重），聚合分析与下载匹配共用这一份结果。"""
         try:
-            torrents = await self.pull_rss(rss_item)
+            torrents = await self._get_torrents(rss_item)
             return torrents, None
         except Exception as e:
             logger.warning(f"Failed to fetch RSS {rss_item.name}: {e}")
@@ -279,12 +278,17 @@ class RSSEngine:
         ``refresh_rss`` 内部过滤，不做跨请求持久化。
         """
         skip_ids: set[int] = set()
+        candidate_ids = {b.id for _, b in matched if b.id in preference_bangumi}
+        if not candidate_ids:
+            # 本批次没有偏好番剧的候选：无需解析已下载版本
+            return skip_ids
 
         # 已下载版本：按完整内容身份记录当前最高 (偏好得分, 修订号)。
+        # 只解析本批次有候选的番剧。
         existing_best: dict[_PreferenceKey, _PreferenceRank] = {}
         for bangumi_id, torrents in existing_downloaded.items():
             bangumi = preference_bangumi.get(bangumi_id)
-            if not bangumi:
+            if not bangumi or bangumi_id not in candidate_ids:
                 continue
             for torrent in torrents:
                 release = parse_configured_release_title(torrent.name)
@@ -335,17 +339,55 @@ class RSSEngine:
         return skip_ids
 
     async def refresh_rss(
-        self, downloaders: DownloaderPool, rss_id: Optional[int] = None
+        self,
+        downloaders: DownloaderPool,
+        rss_id: Optional[int] = None,
+        analyser: "RSSAnalyser | None" = None,
     ) -> list[SystemEvent]:
         """Refresh feeds with one parser engine for the complete workflow.
 
         匹配到的种子投递到规则的下载器实例，规则未指定时用订阅的，再退回默认实例。
+        给出 ``analyser`` 时，先用同一次拉取的结果为聚合订阅生成新规则。
         """
         with parser_engine_snapshot():
-            return await self._refresh_rss(downloaders, rss_id)
+            return await self._refresh_rss(downloaders, rss_id, analyser)
+
+    async def _analyse_aggregate(
+        self,
+        analyser: "RSSAnalyser",
+        item_results: list[tuple[RSSItem, tuple[list[Torrent], Optional[str]]]],
+        bangumi_list: list[Bangumi],
+    ) -> list[Bangumi]:
+        """为聚合订阅生成新规则，返回之后用于匹配的番剧列表。"""
+        for rss_item, (torrents, error) in item_results:
+            if not rss_item.aggregate or error:
+                continue
+            try:
+                if await analyser.rss_to_data(rss_item, torrents, self, bangumi_list):
+                    # 新规则要能被后续订阅与本轮下载匹配到
+                    bangumi_list = await self.db.bangumi.search_all()
+            except Exception:
+                # 仅当该 RSS 确实已在遍历期间被 API 删除时才视为预期情况；
+                # 其余异常可能是真实 bug，需在 WARNING 级别带完整堆栈。
+                if await self.db.rss.search_id(rss_item.id) is None:
+                    logger.debug(
+                        "Skipping RSS id=%s, deleted during iteration",
+                        rss_item.id,
+                    )
+                else:
+                    logger.warning(
+                        "Error analysing RSS id=%s (%s)",
+                        rss_item.id,
+                        rss_item.url,
+                        exc_info=True,
+                    )
+        return bangumi_list
 
     async def _refresh_rss(
-        self, downloaders: DownloaderPool, rss_id: Optional[int] = None
+        self,
+        downloaders: DownloaderPool,
+        rss_id: Optional[int] = None,
+        analyser: "RSSAnalyser | None" = None,
     ) -> list[SystemEvent]:
         # Get All RSS Items
         if not rss_id:
@@ -384,6 +426,10 @@ class RSSEngine:
         # torrent against it in memory (this is the job the old module-level
         # TTL cache existed to do).
         bangumi_list = await self.db.bangumi.search_all()
+        if analyser is not None:
+            bangumi_list = await self._analyse_aggregate(
+                analyser, item_results, bangumi_list
+            )
         events: list[SystemEvent] = []
 
         # Bangumi with a release-group/resolution preference need per-episode
@@ -393,13 +439,6 @@ class RSSEngine:
             for b in bangumi_list
             if b.id is not None and (b.preferred_group or b.preferred_resolution)
         }
-        existing_downloaded: dict[int, list[Torrent]] = {}
-        if preference_bangumi:
-            existing_downloaded = (
-                await self.db.torrent.search_downloaded_by_bangumi_ids(
-                    list(preference_bangumi)
-                )
-            )
 
         # First pass: match every torrent against the bangumi list (this also
         # tags torrent.bangumi_id as a side effect) without downloading yet,
@@ -408,20 +447,38 @@ class RSSEngine:
         item_matches: list[
             tuple[RSSItem, list[Torrent], Optional[str], list[Optional[Bangumi]]]
         ] = []
-        for rss_item, (new_torrents, error) in item_results:
+        for rss_item, (torrents, error) in item_results:
+            try:
+                new_torrents = await self.db.torrent.check_new(torrents)
+            except Exception as e:
+                # 查库出错只算该订阅失败，其余订阅照常处理
+                logger.warning(f"Failed to dedup RSS {rss_item.name}: {e}")
+                new_torrents, error = [], str(e)
             matches = [self.match_torrent(t, bangumi_list) for t in new_torrents]
             matches = await self._apply_plugin_filters(new_torrents, matches)
             item_matches.append((rss_item, new_torrents, error, matches))
 
+        matched_pairs = [
+            (torrent, matched)
+            for _, new_torrents, _, matches in item_matches
+            for torrent, matched in zip(new_torrents, matches)
+            if matched is not None
+        ]
+        # 只为本批次有候选的偏好番剧加载已下载版本；没有候选时不查库
+        candidate_ids = {
+            b.id
+            for _, b in matched_pairs
+            if b.id is not None and b.id in preference_bangumi
+        }
+        existing_downloaded: dict[int, list[Torrent]] = {}
+        if candidate_ids:
+            existing_downloaded = (
+                await self.db.torrent.search_downloaded_by_bangumi_ids(
+                    list(candidate_ids)
+                )
+            )
         skip_ids = self._select_preference_skips(
-            [
-                (torrent, matched)
-                for _, new_torrents, _, matches in item_matches
-                for torrent, matched in zip(new_torrents, matches)
-                if matched is not None
-            ],
-            preference_bangumi,
-            existing_downloaded,
+            matched_pairs, preference_bangumi, existing_downloaded
         )
 
         # Process results sequentially (DB operations)
diff --git a/backend/src/test/test_api_events.py b/backend/src/test/test_api_events.py
index 3de84483..be9bb65c 100644
--- a/backend/src/test/test_api_events.py
+++ b/backend/src/test/test_api_events.py
@@ -2,21 +2,35 @@
 
 import asyncio
 import json
+import os
 import time
+from itertools import chain, repeat
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
 
-from module.api import v1
-from module.api.events import _downloader_payload, _log_payload, _status_payload
+from module.api import events, v1
+from module.api.events import (
+    _downloader_payload,
+    _LogCursor,
+    _status_payload,
+    _TorrentCache,
+)
+from module.api.log import _clear_log_files
 
 # ---------------------------------------------------------------------------
 # Fixtures
 # ---------------------------------------------------------------------------
 
 
+@pytest.fixture(autouse=True)
+def fresh_torrent_cache(monkeypatch):
+    """种子列表缓存是模块级共享状态（含绑定事件循环的锁），每个用例换一份。"""
+    monkeypatch.setattr(events, "_torrents", _TorrentCache())
+
+
 @pytest.fixture
 def app():
     """Create a FastAPI app with v1 routes for testing."""
@@ -191,31 +205,154 @@ class TestEventGeneratorNonBlocking:
         assert json.loads(downloader_event["data"]) is None
 
 
-class TestLogPayload:
-    async def test_log_payload_missing_file_returns_none(self, tmp_path):
-        """_log_payload returns None when the log file doesn't exist yet."""
-        missing = tmp_path / "does-not-exist.log"
-        with patch("module.api.events.LOG_PATH", missing):
-            result = await _log_payload()
+class TestTorrentCache:
+    async def test_concurrent_streams_share_one_fetch_per_ttl(self, monkeypatch):
+        """N 个连接同时取种子列表，TTL 内只查询一次下载器；过期后再查一次。"""
+        fetch = AsyncMock(return_value=[{"hash": "abc"}])
+        monkeypatch.setattr(events, "_downloader_payload", fetch)
+        cache = _TorrentCache()
 
-        assert result is None
+        results = await asyncio.gather(*(cache.get() for _ in range(10)))
+        await cache.get()
+        assert fetch.await_count == 1
+        assert set(results) == {json.dumps([{"hash": "abc"}])}
 
-    async def test_log_payload_reads_tail(self, tmp_path):
-        """_log_payload decodes the tail bytes read via _read_log_tail.
+        monkeypatch.setattr(events, "_DOWNLOADER_CACHE_SECONDS", 0)
+        await cache.get()
+        assert fetch.await_count == 2
 
-        _read_log_tail (imported from module.api.log) resolves LOG_PATH via
-        its own module binding, so both names must be patched together.
-        """
+
+class TestLogCursor:
+    """log 帧：首帧整段尾部；之后只推新增完整行；轮转/截断后重推整段。"""
+
+    @pytest.fixture
+    def log_file(self, tmp_path):
+        """_read_log_tail 通过 module.api.log 自己的 LOG_PATH 绑定读文件，两处一起替换。"""
         log_file = tmp_path / "app.log"
-        log_file.write_text("hello world\n")
-
         with (
             patch("module.api.events.LOG_PATH", log_file),
             patch("module.api.log.LOG_PATH", log_file),
         ):
-            result = await _log_payload()
+            yield log_file
 
-        assert result == "hello world\n"
+    async def test_missing_file_yields_no_frame(self, log_file):
+        assert await _LogCursor().frame() is None
+
+    async def test_first_frame_is_full_tail(self, log_file):
+        log_file.write_text("hello world\n")
+
+        frame = await _LogCursor().frame()
+
+        assert frame == {"event": "log", "data": "hello world\n"}
+
+    @pytest.mark.parametrize(
+        ("appended", "expected"),
+        [
+            ("second 第二行\n", "second 第二行\n"),
+            # 半行留到写完整再推，偏移只前进到最后一个换行
+            ("second\nthi", "second\n"),
+            ("", None),
+            ("thi", None),
+        ],
+    )
+    async def test_append_yields_only_new_complete_lines(
+        self, log_file, appended, expected
+    ):
+        log_file.write_text("hello world\n")
+        cursor = _LogCursor()
+        await cursor.frame()
+
+        with log_file.open("a") as f:
+            f.write(appended)
+        frame = await cursor.frame()
+
+        if expected is None:
+            assert frame is None
+        else:
+            assert frame == {"event": "log_append", "data": expected}
+
+    async def test_partial_line_is_sent_once_completed(self, log_file):
+        log_file.write_text("hello world\n")
+        cursor = _LogCursor()
+        await cursor.frame()
+
+        with log_file.open("a") as f:
+            f.write("thi")
+        assert await cursor.frame() is None
+        with log_file.open("a") as f:
+            f.write("rd\n")
+
+        assert await cursor.frame() == {"event": "log_append", "data": "third\n"}
+
+    async def test_empty_log_on_connect_yields_log_clear(self, log_file):
+        """清空后重连：空日志推 log_clear，前端才会丢掉上个连接的旧文本。"""
+        log_file.write_text("")
+        cursor = _LogCursor()
+
+        assert await cursor.frame() == {"event": "log_clear", "data": "1"}
+        assert await cursor.frame() is None
+
+    @pytest.mark.parametrize("clear", ["truncate", "api"])
+    async def test_cleared_log_yields_log_clear_then_appends(self, log_file, clear):
+        """截断或经 /log/clear 清空：推一次 log_clear，之后的新行按增量推。"""
+        log_file.write_text("old line\n")
+        cursor = _LogCursor()
+        await cursor.frame()
+
+        if clear == "truncate":
+            log_file.write_text("")
+        else:
+            _clear_log_files()
+        assert await cursor.frame() == {"event": "log_clear", "data": "1"}
+        assert await cursor.frame() is None
+        with log_file.open("a") as f:
+            f.write("fresh\n")
+
+        assert await cursor.frame() == {"event": "log_append", "data": "fresh\n"}
+
+    async def test_clear_then_regrow_past_offset_sends_full_frame(self, log_file):
+        """清空后、下一次读取前日志已长过旧偏移：仍推整段，而不是从旧偏移增量。"""
+        log_file.write_text("old line\n")
+        cursor = _LogCursor()
+        await cursor.frame()
+
+        _clear_log_files()
+        with log_file.open("a") as f:
+            f.write("fresh line after clear\n")
+
+        assert await cursor.frame() == {
+            "event": "log",
+            "data": "fresh line after clear\n",
+        }
+
+    @pytest.mark.parametrize(
+        ("change", "expected"),
+        [
+            ("truncate", "new\n"),
+            # 轮转后 log.txt 近乎为空，整段尾部会拼上 .1 备份
+            ("rotate", "old line one\nold line two\nnew\n"),
+            # 同 inode、同大小，但 mtime 回退（被整体替换写回）
+            ("mtime_reset", "NEW line one\nNEW line two\n"),
+        ],
+    )
+    async def test_rotation_or_truncation_yields_full_frame(
+        self, log_file, change, expected
+    ):
+        log_file.write_text("old line one\nold line two\n")
+        cursor = _LogCursor()
+        await cursor.frame()
+
+        if change == "truncate":
+            log_file.write_text("new\n")
+        elif change == "rotate":
+            log_file.rename(log_file.with_name(f"{log_file.name}.1"))
+            log_file.write_text("new\n")
+        else:
+            st = log_file.stat()
+            log_file.write_text("NEW line one\nNEW line two\n")
+            os.utime(log_file, ns=(st.st_atime_ns, st.st_mtime_ns - 10**9))
+
+        assert await cursor.frame() == {"event": "log", "data": expected}
 
 
 # ---------------------------------------------------------------------------
@@ -235,7 +372,7 @@ class TestNotificationEvent:
         monkeypatch.setattr(host, "_bus", bus)
         return bus
 
-    def _generator(self, tmp_path, *, tick=0.01, payload=None):
+    def _generator(self, tmp_path, *, tick=0.01, payload=None, downloader=None):
         from module.api.events import _event_generator
 
         request = AsyncMock()
@@ -249,7 +386,7 @@ class TestNotificationEvent:
         patches = (
             patch(
                 "module.api.events._downloader_payload",
-                new=AsyncMock(return_value=None),
+                new=downloader or AsyncMock(return_value=None),
             ),
             patch("module.api.events.LOG_PATH", tmp_path / "missing.log"),
             patch("module.api.events._notification_payload", new=notification),
@@ -283,12 +420,41 @@ class TestNotificationEvent:
         with patches[0], patches[1], patches[2], patches[3]:
             try:
                 await self._collect(gen, 3)  # 第一个 tick
-                # tick3 status、tick5 downloader —— 中间不应再有 notification
+                # tick3 status、tick6 status（tick5 的 downloader 负载未变，不推）
+                # —— 中间不应再有 notification
                 more = await self._collect(gen, 2)
             finally:
                 await gen.aclose()
 
-        assert [e["event"] for e in more] == ["status", "downloader"]
+        assert [e["event"] for e in more] == ["status", "status"]
+
+    @pytest.mark.parametrize(
+        ("second", "expected"),
+        [
+            (
+                [{"hash": "a"}],
+                ["status", "downloader", "notification", "status", "status"],
+            ),
+            (
+                [{"hash": "b"}],
+                ["status", "downloader", "notification", "status", "downloader"],
+            ),
+        ],
+    )
+    async def test_downloader_frame_only_when_payload_changes(
+        self, tmp_path, bus, monkeypatch, second, expected
+    ):
+        fetch = AsyncMock(side_effect=chain([[{"hash": "a"}]], repeat(second)))
+        monkeypatch.setattr(events, "_DOWNLOADER_CACHE_SECONDS", 0)
+        gen, patches = self._generator(tmp_path, downloader=fetch)
+        with patches[0], patches[1], patches[2], patches[3]:
+            try:
+                got = await self._collect(gen, 5)  # tick0 … tick5
+            finally:
+                await gen.aclose()
+
+        assert [e["event"] for e in got] == expected
+        assert fetch.await_count == 2
 
     async def test_inbox_change_pushes_frame_immediately(self, tmp_path, bus):
         from module.notification.inbox import bump_inbox_revision, inbox_revision
diff --git a/backend/src/test/test_api_log.py b/backend/src/test/test_api_log.py
index f04848dc..82eff90c 100644
--- a/backend/src/test/test_api_log.py
+++ b/backend/src/test/test_api_log.py
@@ -149,7 +149,7 @@ class TestGetLog:
         from module.api.log import _read_file_tail
 
         missing = temp_log_file.with_name("gone.txt")
-        assert _read_file_tail(missing, 100) == (b"", False)
+        assert _read_file_tail(missing, 100) == (b"", False, 0)
 
 
 # ---------------------------------------------------------------------------
diff --git a/backend/src/test/test_conf_log.py b/backend/src/test/test_conf_log.py
index 72607c83..1494f914 100644
--- a/backend/src/test/test_conf_log.py
+++ b/backend/src/test/test_conf_log.py
@@ -1,5 +1,8 @@
 """启动时日志轮转（rotate_boot_log）：历史进备份而非被删除。"""
 
+import os
+import subprocess
+import sys
 from pathlib import Path
 
 import pytest
@@ -66,3 +69,21 @@ class TestRotateBootLog:
         conf_log.rotate_boot_log()
 
         assert log_path.read_text() == "content"
+
+
+def test_setup_logger_replaces_handlers_installed_by_earlier_imports(tmp_path: Path):
+    """生产导入顺序里 mcp 早于 setup_logger 导入；根日志器已有处理器时
+    basicConfig 不能被静默跳过，日志必须落到 data/log.txt。"""
+    code = (
+        "import logging, main\n"
+        "assert [type(h).__name__ for h in logging.getLogger().handlers]"
+        " == ['QueueHandler']\n"
+        "logging.getLogger('probe').info('probe-marker')\n"
+    )
+    src = Path(__file__).resolve().parents[1]
+    env = {**os.environ, "PYTHONPATH": str(src)}
+    subprocess.run(
+        [sys.executable, "-c", code], cwd=tmp_path, env=env, check=True, timeout=60
+    )
+    # 子进程退出时 atexit 会排空日志队列
+    assert "probe-marker" in (tmp_path / "data" / "log.txt").read_text()
diff --git a/backend/src/test/test_database_rename_operation.py b/backend/src/test/test_database_rename_operation.py
index ffcf8864..32c59b1c 100644
--- a/backend/src/test/test_database_rename_operation.py
+++ b/backend/src/test/test_database_rename_operation.py
@@ -4,6 +4,7 @@ from datetime import datetime, timedelta, timezone
 from typing import Any
 
 import pytest
+from sqlalchemy import text
 from sqlalchemy.exc import IntegrityError
 
 from module.database import Database
@@ -268,3 +269,28 @@ async def test_database_facade_exposes_rename_operation_repository(db_engine):
         row, created = await db.rename_operation.get_or_create(_operation())
         assert created is True
         assert await db.rename_operation.get(row.id) is not None
+
+
+async def test_get_by_target_active_filter_uses_partial_unique_index(db_session):
+    """state 过滤必须写成 NOT IN ('done')，才能命中同样条件的部分唯一索引。"""
+    repo = RenameOperationDatabase(db_session)
+    captured: list[Any] = []
+    original = db_session.execute
+
+    async def spy(statement, *args, **kwargs):
+        captured.append(statement)
+        return await original(statement, *args, **kwargs)
+
+    db_session.execute = spy  # type: ignore[method-assign]
+    await repo.get_by_target(
+        downloader_type="qbittorrent", save_path="/d", target_path="t.mp4"
+    )
+    db_session.execute = original  # type: ignore[method-assign]
+
+    plan = await db_session.execute(
+        text(
+            "EXPLAIN QUERY PLAN "
+            + str(captured[0].compile(compile_kwargs={"literal_binds": True}))
+        )
+    )
+    assert "ux_rename_operation_active_target" in " ".join(r[3] for r in plan)
diff --git a/backend/src/test/test_http_perf.py b/backend/src/test/test_http_perf.py
new file mode 100644
index 00000000..b92dac31
--- /dev/null
+++ b/backend/src/test/test_http_perf.py
@@ -0,0 +1,107 @@
+"""HTTP 层性能头：gzip 压缩与 SPA 静态文件的缓存策略。"""
+
+import asyncio
+from unittest.mock import MagicMock
+
+import pytest
+from fastapi.testclient import TestClient
+
+import main
+from module.api.deps import get_context
+from module.security.api import get_current_user
+
+HTML = {"accept": "text/html"}
+GZIP = {"accept-encoding": "gzip"}
+IMMUTABLE = "public, max-age=31536000, immutable"
+
+
+@pytest.fixture
+def app(tmp_path):
+    dist = tmp_path / "dist"
+    for sub in ("assets", "fonts", "images"):
+        (dist / sub).mkdir(parents=True)
+    (dist / "index.html").write_text("<html>spa</html>")
+    (dist / "theme-init.js").write_text("// theme")
+    (dist / "assets" / "app-abc.js").write_text("export const x = 1;\n" * 200)
+    (dist / "fonts" / "a.woff2").write_text("font")
+    (dist / "images" / "a.svg").write_text("<svg/>")
+    app = main.create_app()
+    main.mount_webui(app, dist)
+    return app
+
+
+class TestSpaCacheControl:
+    @pytest.mark.parametrize("root_path", ["", "/ab"])
+    @pytest.mark.parametrize(
+        ("path", "cache_control"),
+        [
+            ("assets/app-abc.js", IMMUTABLE),
+            ("", "no-cache"),
+            ("index.html", "no-cache"),
+            # 前端路由深链接回落到 index.html
+            ("bangumi", "no-cache"),
+            ("bangumi/detail/3", "no-cache"),
+            # assets/ 下不存在的路径同样回落到 index.html，不能永久缓存
+            ("assets/missing", "no-cache"),
+            ("fonts/a.woff2", None),
+            ("images/a.svg", None),
+            ("theme-init.js", None),
+        ],
+    )
+    def test_cache_control_by_path(self, app, root_path, path, cache_control):
+        resp = TestClient(app, root_path=root_path).get(
+            f"{root_path}/{path}", headers=HTML
+        )
+        assert resp.status_code == 200
+        assert resp.headers.get("cache-control") == cache_control
+
+
+class TestGzip:
+    def test_large_static_asset_is_gzipped(self, app):
+        resp = TestClient(app).get("/assets/app-abc.js", headers=GZIP)
+        assert resp.headers["content-encoding"] == "gzip"
+
+    def test_small_response_is_not_gzipped(self, app):
+        resp = TestClient(app).get("/", headers={**HTML, **GZIP})
+        assert "content-encoding" not in resp.headers
+
+    def test_event_stream_is_not_gzipped(self, app):
+        app.dependency_overrides[get_current_user] = lambda: "user"
+        app.dependency_overrides[get_context] = lambda: MagicMock(
+            is_running=True, first_run=False
+        )
+        started: dict = {}
+
+        async def drive() -> None:
+            scope = {
+                "type": "http",
+                "method": "GET",
+                "path": "/api/v1/events/stream",
+                "raw_path": b"/api/v1/events/stream",
+                "query_string": b"",
+                "headers": [(b"accept-encoding", b"gzip")],
+                "scheme": "http",
+                "server": ("test", 80),
+                "client": ("test", 1),
+                "http_version": "1.1",
+                "root_path": "",
+            }
+
+            async def receive() -> dict:
+                await asyncio.Event().wait()  # 客户端保持连接，不发 disconnect
+                return {}
+
+            async def send(message: dict) -> None:
+                if message["type"] == "http.response.start":
+                    started.update(message)
+                    raise asyncio.CancelledError  # 只取响应头，随后断开
+
+            try:
+                await app(scope, receive, send)
+            except asyncio.CancelledError:
+                pass
+
+        asyncio.run(drive())
+        headers = {k.decode(): v.decode() for k, v in started["headers"]}
+        assert headers["content-type"].startswith("text/event-stream")
+        assert "content-encoding" not in headers
diff --git a/backend/src/test/test_loops.py b/backend/src/test/test_loops.py
index 54cd1604..9f55b240 100644
--- a/backend/src/test/test_loops.py
+++ b/backend/src/test/test_loops.py
@@ -10,7 +10,7 @@ returned events into ``notifier.send_event`` calls, gated by
 
 import asyncio
 import time
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import ANY, AsyncMock, MagicMock, patch
 
 from module.core.loops import (
     offset_scan_tick,
@@ -93,7 +93,6 @@ class TestRssTick:
         analyser = AsyncMock()
 
         mock_db = AsyncMock()
-        mock_db.rss.search_aggregate = AsyncMock(return_value=[])
         mock_engine = AsyncMock()
         mock_engine.refresh_rss = AsyncMock(return_value=events)
 
@@ -110,6 +109,7 @@ class TestRssTick:
             mock_settings.bangumi_manage.eps_complete = False
             await rss_tick(analyser, notifier)
 
+        mock_engine.refresh_rss.assert_awaited_once_with(ANY, analyser=analyser)
         notifier.send_event.assert_awaited_once_with(events[0])
 
     async def test_events_forwarded_even_when_external_push_disabled(self):
@@ -119,7 +119,6 @@ class TestRssTick:
         analyser = AsyncMock()
 
         mock_db = AsyncMock()
-        mock_db.rss.search_aggregate = AsyncMock(return_value=[])
         mock_engine = AsyncMock()
         mock_engine.refresh_rss = AsyncMock(return_value=events)
 
diff --git a/backend/src/test/test_main_lifespan.py b/backend/src/test/test_main_lifespan.py
index 41b17ae5..359fcda1 100644
--- a/backend/src/test/test_main_lifespan.py
+++ b/backend/src/test/test_main_lifespan.py
@@ -1,5 +1,10 @@
 """Tests for the application lifespan wiring in main.create_app."""
 
+import asyncio
+import os
+import subprocess
+import sys
+from pathlib import Path
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
@@ -21,6 +26,22 @@ def _lifespan_ctx(first_run_boot: bool = False) -> MagicMock:
 
 
 class TestCreateApp:
+    def test_import_main_skips_mcp_and_webauthn(self):
+        """启动不加载 mcp 与 webauthn 库（其它测试已导入它们，须在子进程里检查）。"""
+        src = Path(main.__file__).parent
+        code = (
+            "import sys, main; print(sorted({'mcp', 'webauthn'} & sys.modules.keys()))"
+        )
+        out = subprocess.run(
+            [sys.executable, "-c", code],
+            cwd=src.parent,
+            env={**os.environ, "PYTHONPATH": str(src)},
+            capture_output=True,
+            text=True,
+        )
+        assert out.returncode == 0, out.stderr
+        assert out.stdout.strip().splitlines()[-1] == "[]"
+
     def test_stores_real_context_on_state(self):
         app = main.create_app()
         assert isinstance(app.state.ctx, AppContext)
@@ -98,6 +119,10 @@ class TestMcpEndpoint:
                     },
                 )
                 assert init.status_code == 200
+                from module.mcp import mcp
+
+                manager = mcp.session_manager
+                assert manager._task_group is not None
                 session = {"mcp-session-id": init.headers["mcp-session-id"]}
                 client.post(
                     "/mcp",
@@ -113,6 +138,26 @@ class TestMcpEndpoint:
                 assert '"list_anime"' in listed.text
                 # 旧的 SSE 端点已删除
                 assert client.get("/mcp/sse", headers=self.HEADERS).status_code == 404
+        # 关停时会话管理器随 lifespan 的任务组停止
+        assert manager._task_group is None
+
+    async def test_concurrent_first_requests_build_once(self):
+        lazy = main._LazyMcpApp(MagicMock())
+        inner = AsyncMock()
+        with (
+            patch("module.mcp.create_mcp_app", return_value=inner) as build,
+            patch("module.mcp.mcp") as server,
+        ):
+            async with lazy.running():
+                await asyncio.gather(
+                    *(
+                        lazy({"type": "http"}, AsyncMock(), AsyncMock())
+                        for _ in range(5)
+                    )
+                )
+        build.assert_called_once()
+        server.session_manager.run.assert_called_once()
+        assert inner.await_count == 5
 
     def test_rejected_without_token_or_whitelisted_ip(self):
         with patch("main.AppContext.build", return_value=_lifespan_ctx()):
diff --git a/backend/src/test/test_rss_analyser_typed_identity.py b/backend/src/test/test_rss_analyser_typed_identity.py
index 7c6db5c8..23933f0a 100644
--- a/backend/src/test/test_rss_analyser_typed_identity.py
+++ b/backend/src/test/test_rss_analyser_typed_identity.py
@@ -8,7 +8,7 @@ from unittest.mock import patch
 import pytest
 
 from module.conf import settings
-from module.models import Movie, Torrent
+from module.models import Movie, RSSItem, Torrent
 from module.models.config import LLM
 from module.parser.analyser import selector
 from module.parser.analyser.selector import parse_configured_release_title
@@ -97,8 +97,8 @@ async def test_rss_to_data_keeps_one_parser_engine_across_awaits(
     torrent = Torrent(name="resource", url="https://example.com/resource")
     analyser = RSSAnalyser()
 
-    async def get_rss_torrents(rss_link: str, full_parse: bool = True):
-        return [torrent]
+    async def check_new(torrents, rss: RSSItem | None = None):
+        return torrents
 
     async def match_movies(torrents, rss_link: str):
         assert parse_configured_release_title(torrent.name) is classic_release
@@ -107,7 +107,7 @@ async def test_rss_to_data_keeps_one_parser_engine_across_awaits(
         assert parse_configured_release_title(torrent.name) is classic_release
         return torrents
 
-    async def match_bangumi(torrents, rss_link: str):
+    async def match_bangumi(torrents, rss_link: str, match_datas):
         assert parse_configured_release_title(torrent.name) is classic_release
         return torrents
 
@@ -115,19 +115,19 @@ async def test_rss_to_data_keeps_one_parser_engine_across_awaits(
         assert parse_configured_release_title(torrent.name) is classic_release
         return [], []
 
-    monkeypatch.setattr(analyser, "get_rss_torrents", get_rss_torrents)
     monkeypatch.setattr(analyser, "torrents_to_data", torrents_to_data)
     engine = cast(
         RSSEngine,
         SimpleNamespace(
             db=SimpleNamespace(
+                torrent=SimpleNamespace(check_new=check_new),
                 movie=SimpleNamespace(match_list=match_movies),
                 bangumi=SimpleNamespace(match_list=match_bangumi),
             )
         ),
     )
 
-    await analyser.rss_to_data(make_rss_item(parser="none"), engine)
+    await analyser.rss_to_data(make_rss_item(parser="none"), [torrent], engine, [])
 
     # The task-local scope is gone, so a later workflow sees the new setting.
     assert parse_configured_release_title(torrent.name) is preview_release
diff --git a/backend/src/test/test_rss_engine_new.py b/backend/src/test/test_rss_engine_new.py
index 1576a7f9..8409a711 100644
--- a/backend/src/test/test_rss_engine_new.py
+++ b/backend/src/test/test_rss_engine_new.py
@@ -1,18 +1,24 @@
-"""Tests for RSS engine: pull_rss, match_torrent, refresh_rss, add_rss."""
+"""Tests for RSS engine: aggregate analysis, match_torrent, refresh_rss, add_rss."""
 
 import asyncio
 from unittest.mock import AsyncMock, patch
 
 import pytest
 import pytest_asyncio
+from sqlalchemy.exc import OperationalError
 
 from module.conf import settings
 from module.database import Database
+from module.database.bangumi import BangumiDatabase
+from module.database.movie import MovieDatabase
+from module.database.torrent import TorrentDatabase
 from module.downloader import AddResult
 from module.models import Torrent
+from module.network import RequestContent
 from module.notification.events import DownloadFailureEvent, RssFailureEvent
 from module.parser.analyser.selector import parse_configured_release_title
 from module.parser.analyser.tokenizer import ReleaseKind
+from module.rss.analyser import RSSAnalyser
 from module.rss.engine import RSSEngine
 from test.factories import SingleClientPool, make_bangumi, make_rss_item, make_torrent
 
@@ -24,68 +30,135 @@ async def rss_engine(db_engine):
 
 
 # ---------------------------------------------------------------------------
-# pull_rss
+# 聚合订阅分析（refresh_rss 带 analyser，即 rss_tick）
 # ---------------------------------------------------------------------------
 
+FEED_A = "https://mikanani.me/RSS/MyBangumi?token=a"
+FEED_B = "https://mikanani.me/RSS/MyBangumi?token=b"
+KNOWN_URL = "https://example.com/known.torrent"
 
-class TestPullRss:
-    async def test_returns_only_new_torrents(self, rss_engine):
-        """pull_rss filters out torrents already in the database."""
-        rss_item = make_rss_item()
-        await rss_engine.db.rss.add(rss_item)
-        rss_item = await rss_engine.db.rss.search_id(1)
 
-        # Pre-insert one torrent into DB
-        existing = make_torrent(url="https://example.com/existing.torrent", rss_id=1)
-        await rss_engine.db.torrent.add(existing)
-
-        # Mock _get_torrents to return 3 torrents (1 existing + 2 new)
-        all_torrents = [
-            Torrent(name="existing", url="https://example.com/existing.torrent"),
-            Torrent(name="new1", url="https://example.com/new1.torrent"),
-            Torrent(name="new2", url="https://example.com/new2.torrent"),
+async def _tick_with_feeds(
+    engine: RSSEngine, items: dict[str, list[Torrent]]
+) -> AsyncMock:
+    """按订阅 URL 返回 items 跑一轮刷新，返回 HTTP 层 get_torrents 的替身。"""
+    client = AsyncMock()
+    client.add_torrent = AsyncMock(return_value=AddResult.ADDED)
+    get = AsyncMock(
+        side_effect=lambda url, *_a, **_k: [
+            Torrent(name=t.name, url=t.url) for t in items[url]
         ]
-        with patch.object(
-            RSSEngine, "_get_torrents", new_callable=AsyncMock
-        ) as mock_get:
-            mock_get.return_value = all_torrents
-            result = await rss_engine.pull_rss(rss_item)
+    )
+    with (
+        patch.object(RequestContent, "get_torrents", get),
+        patch("module.rss.engine.RSS_PER_HOST_DELAY", 0),
+        patch("module.rss.analyser.enrich_bangumi", AsyncMock()),
+        patch("module.rss.analyser.enrich_movie", AsyncMock()),
+    ):
+        await engine.refresh_rss(SingleClientPool(client), analyser=RSSAnalyser())
+    return get
 
-        assert len(result) == 2
-        assert all(t.url != "https://example.com/existing.torrent" for t in result)
 
-    async def test_all_existing_returns_empty(self, rss_engine):
-        """When all torrents already exist, returns empty list."""
-        rss_item = make_rss_item()
-        await rss_engine.db.rss.add(rss_item)
-        rss_item = await rss_engine.db.rss.search_id(1)
+class TestAggregateAnalysis:
+    async def test_item_matched_for_same_feed_skips_matching(self, rss_engine):
+        """本订阅已匹配入库、番剧 rss_link 已含本订阅 URL 的种子不再匹配。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_A))
+        await rss_engine.db.bangumi.add(
+            make_bangumi(title_raw="Dungeon Meshi", filter="", rss_link=FEED_A)
+        )
+        await rss_engine.db.torrent.add(
+            make_torrent(
+                name="[Sub] Dungeon Meshi - 01 [1080p].mkv",
+                url=KNOWN_URL,
+                rss_id=1,
+                bangumi_id=1,
+            )
+        )
+        known = Torrent(name="[Sub] Dungeon Meshi - 01 [1080p].mkv", url=KNOWN_URL)
 
-        existing = make_torrent(url="https://example.com/only.torrent", rss_id=1)
-        await rss_engine.db.torrent.add(existing)
+        with (
+            patch.object(
+                BangumiDatabase, "match_list", new_callable=AsyncMock
+            ) as bangumi_match,
+            patch.object(
+                MovieDatabase, "match_list", new_callable=AsyncMock
+            ) as movie_match,
+        ):
+            await _tick_with_feeds(rss_engine, {FEED_A: [known]})
 
-        with patch.object(
-            RSSEngine, "_get_torrents", new_callable=AsyncMock
-        ) as mock_get:
-            mock_get.return_value = [
-                Torrent(name="only", url="https://example.com/only.torrent")
-            ]
-            result = await rss_engine.pull_rss(rss_item)
+        bangumi_match.assert_not_awaited()
+        movie_match.assert_not_awaited()
+        assert len(await rss_engine.db.bangumi.search_all()) == 1
 
-        assert result == []
+    async def test_edited_feed_url_appends_to_rss_link(self, rss_engine):
+        """订阅改了 URL（rss_id 不变）：本订阅已匹配的种子仍要匹配，
+        把新 URL 追加到 rss_link，补下载才不会用过期链接（#1053）。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_B))
+        await rss_engine.db.bangumi.add(
+            make_bangumi(title_raw="Mushoku Tensei", filter="", rss_link=FEED_A)
+        )
+        name = "[Sub] Mushoku Tensei - 12 [1080p].mkv"
+        await rss_engine.db.torrent.add(
+            make_torrent(name=name, url=KNOWN_URL, rss_id=1, bangumi_id=1)
+        )
 
-    async def test_empty_feed_returns_empty(self, rss_engine):
-        """When RSS feed has no torrents, returns empty list."""
-        rss_item = make_rss_item()
-        await rss_engine.db.rss.add(rss_item)
-        rss_item = await rss_engine.db.rss.search_id(1)
+        await _tick_with_feeds(
+            rss_engine, {FEED_B: [Torrent(name=name, url=KNOWN_URL)]}
+        )
 
-        with patch.object(
-            RSSEngine, "_get_torrents", new_callable=AsyncMock
-        ) as mock_get:
-            mock_get.return_value = []
-            result = await rss_engine.pull_rss(rss_item)
+        bangumi = await rss_engine.db.bangumi.search_id(1)
+        assert bangumi is not None
+        assert bangumi.rss_link.split(",") == [FEED_A, FEED_B]
 
-        assert result == []
+    async def test_orphan_for_same_feed_is_analysed_again(self, rss_engine):
+        """本订阅记录的未匹配种子（孤儿）每轮仍参与分析，新番能生成规则。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_A))
+        name = "[Sub] Dungeon Meshi - 01 [1080p].mkv"
+        await rss_engine.db.torrent.add(
+            make_torrent(name=name, url=KNOWN_URL, rss_id=1)
+        )
+
+        await _tick_with_feeds(
+            rss_engine, {FEED_A: [Torrent(name=name, url=KNOWN_URL)]}
+        )
+
+        rules = await rss_engine.db.bangumi.search_all()
+        assert [b.title_raw for b in rules] == ["Dungeon Meshi"]
+
+    async def test_known_torrent_in_second_feed_appends_rss_link(self, rss_engine):
+        """其他订阅已知的种子出现在新聚合订阅里：仍把新订阅追加到 rss_link（#1053）。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_A))
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_B))
+        await rss_engine.db.bangumi.add(
+            make_bangumi(title_raw="Mushoku Tensei", filter="", rss_link=FEED_A)
+        )
+        name = "[Sub] Mushoku Tensei - 12 [1080p].mkv"
+        await rss_engine.db.torrent.add(
+            make_torrent(name=name, url=KNOWN_URL, rss_id=1, bangumi_id=1)
+        )
+        known = Torrent(name=name, url=KNOWN_URL)
+
+        await _tick_with_feeds(rss_engine, {FEED_A: [known], FEED_B: [known]})
+
+        bangumi = await rss_engine.db.bangumi.search_id(1)
+        assert bangumi is not None
+        assert bangumi.rss_link.split(",") == [FEED_A, FEED_B]
+
+    async def test_each_feed_fetched_once_per_tick(self, rss_engine):
+        """聚合订阅不再单独请求：每轮每个订阅只有一次 HTTP GET。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_A))
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_B, aggregate=False))
+        await rss_engine.db.bangumi.add(
+            make_bangumi(title_raw="Mushoku Tensei", filter="", rss_link=FEED_A)
+        )
+        items = {
+            FEED_A: [Torrent(name="[Sub] Mushoku Tensei - 12 [1080p].mkv", url="a")],
+            FEED_B: [Torrent(name="[Sub] Mushoku Tensei - 13 [1080p].mkv", url="b")],
+        }
+
+        get = await _tick_with_feeds(rss_engine, items)
+
+        assert sorted(c.args[0] for c in get.await_args_list) == [FEED_A, FEED_B]
 
 
 # ---------------------------------------------------------------------------
@@ -884,6 +957,40 @@ class TestRefreshRssPerHostThrottle:
             item = await rss_engine.db.rss.search_id(rss_id)
             assert item.connection_status == "healthy"
 
+    async def test_dedup_error_marks_only_that_feed_failed(self, rss_engine):
+        """某订阅去重查库出错只把该订阅标为失败，其余订阅照常下载。"""
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_A, aggregate=False))
+        await rss_engine.db.rss.add(make_rss_item(url=FEED_B, aggregate=False))
+        await rss_engine.db.bangumi.add(
+            make_bangumi(title_raw="Mushoku Tensei", filter="", rss_link=FEED_B)
+        )
+        items = {
+            FEED_A: [Torrent(name="[Sub] Mushoku Tensei - 12 [1080p].mkv", url="a")],
+            FEED_B: [Torrent(name="[Sub] Mushoku Tensei - 13 [1080p].mkv", url="b")],
+        }
+        check_new = TorrentDatabase.check_new
+
+        async def flaky_check_new(self, torrents, rss=None):
+            if any(t.url == "a" for t in torrents):
+                raise OperationalError("SELECT", {}, Exception("disk I/O error"))
+            return await check_new(self, torrents, rss)
+
+        client = AsyncMock()
+        client.add_torrent = AsyncMock(return_value=AddResult.ADDED)
+        get = AsyncMock(side_effect=lambda url, *_a, **_k: items[url])
+        with (
+            patch.object(RequestContent, "get_torrents", get),
+            patch.object(TorrentDatabase, "check_new", flaky_check_new),
+            patch("module.rss.engine.RSS_PER_HOST_DELAY", 0),
+        ):
+            await rss_engine.refresh_rss(SingleClientPool(client))
+
+        feed_a = await rss_engine.db.rss.search_id(1)
+        feed_b = await rss_engine.db.rss.search_id(2)
+        assert feed_a.connection_status == "error"
+        assert feed_b.connection_status == "healthy"
+        assert [c.args[0].url for c in client.add_torrent.await_args_list] == ["b"]
+
 
 # ---------------------------------------------------------------------------
 # Release-group / resolution preference dedup
@@ -1403,3 +1510,59 @@ class TestRefreshRssPreferenceDedup:
             await rss_engine.refresh_rss(SingleClientPool(client))
 
         assert client.add_torrent.call_count == 2
+
+
+class TestPreferencePreload:
+    @pytest.fixture(autouse=True)
+    def use_preview_engine(self):
+        with patch.object(settings.rss_parser, "engine", "tokenizer"):
+            yield
+
+    @pytest.mark.parametrize(
+        ("name", "expected_ids"),
+        [
+            ("[GroupA] Dungeon Meshi - 01 [1080p].mkv", None),
+            ("[GroupA] Mushoku Tensei - 12 [1080p].mkv", [1]),
+        ],
+        ids=["no-preference-candidate", "one-preference-candidate"],
+    )
+    async def test_downloaded_loaded_only_for_candidate_bangumi(
+        self, rss_engine, name, expected_ids
+    ):
+        """只为本批次有候选的偏好番剧加载已下载版本；没有候选时不查库。"""
+        await rss_engine.db.rss.add(make_rss_item(aggregate=False))
+        for title_raw, preferred_group in (
+            ("Mushoku Tensei", "GroupA"),
+            ("Dungeon Meshi", None),
+            ("Sousou no Frieren", "GroupA"),
+        ):
+            await rss_engine.db.bangumi.add(
+                make_bangumi(
+                    official_title=title_raw,
+                    title_raw=title_raw,
+                    filter="",
+                    preferred_group=preferred_group,
+                )
+            )
+        client = AsyncMock()
+        client.add_torrent = AsyncMock(return_value=AddResult.ADDED)
+
+        with (
+            patch.object(
+                RSSEngine,
+                "_get_torrents",
+                AsyncMock(return_value=[Torrent(name=name, url="https://x/1")]),
+            ),
+            patch.object(
+                rss_engine.db.torrent,
+                "search_downloaded_by_bangumi_ids",
+                AsyncMock(return_value={}),
+            ) as preload,
+        ):
+            await rss_engine.refresh_rss(SingleClientPool(client))
+
+        client.add_torrent.assert_awaited_once()
+        if expected_ids is None:
+            preload.assert_not_awaited()
+        else:
+            preload.assert_awaited_once_with(expected_ids)
diff --git a/backend/src/test/test_tmdb.py b/backend/src/test/test_tmdb.py
index 45dbbcb1..3bf6dfdb 100644
--- a/backend/src/test/test_tmdb.py
+++ b/backend/src/test/test_tmdb.py
@@ -318,3 +318,85 @@ async def test_tmdb_parser_live():
     assert tmdb_info.title == "冰海战记"
     assert tmdb_info.year == bangumi_year
     assert tmdb_info.last_season == bangumi_season
+
+
+async def test_tmdb_parser_negative_result_is_cached_until_ttl_expires(mocker):
+    """查不到的标题在 TTL 内只请求一次，过期后重新请求。"""
+    requests: list[str] = []
+
+    async def fake_get_json(url: str) -> dict:
+        requests.append(url)
+        return {"results": []}
+
+    mocker.patch.object(
+        tmdb_parser_module.RequestContent, "get_json", side_effect=fake_get_json
+    )
+    now = mocker.patch.object(tmdb_parser_module.time, "monotonic", return_value=0.0)
+    tmdb_parser_module._tmdb_cache.clear()
+
+    assert await tmdb_parser("不存在", "zh", test=True) is None
+    first = len(requests)
+    assert await tmdb_parser("不存在", "zh", test=True) is None
+    assert len(requests) == first
+
+    now.return_value = tmdb_parser_module._TMDB_NEGATIVE_TTL + 1
+    assert await tmdb_parser("不存在", "zh", test=True) is None
+    assert len(requests) == 2 * first
+
+
+async def test_tmdb_parser_cache_hit_refreshes_lru_order(mocker):
+    """命中的条目移到队尾，满员淘汰的是最久未用而非最早写入的条目。"""
+    mocker.patch.object(tmdb_parser_module, "_TMDB_CACHE_MAX", 2)
+    mocker.patch.object(
+        tmdb_parser_module.RequestContent, "get_json", side_effect=_fake_get_json
+    )
+    tmdb_parser_module._tmdb_cache.clear()
+
+    await tmdb_parser("A", "zh", test=True)
+    await tmdb_parser("B", "zh", test=True)
+    await tmdb_parser("A", "zh", test=True)  # 命中，A 变为最近使用
+    await tmdb_parser("C", "zh", test=True)  # 淘汰 B
+
+    assert list(tmdb_parser_module._tmdb_cache) == [
+        "A:zh:True:False",
+        "C:zh:True:False",
+    ]
+
+
+async def test_tmdb_parser_request_failure_is_not_cached(mocker):
+    """请求失败（get_json 返回 None）不当作「无匹配」缓存，下次照常请求。"""
+    requests: list[str] = []
+
+    async def fake_get_json(url: str) -> dict | None:
+        requests.append(url)
+        return None
+
+    mocker.patch.object(
+        tmdb_parser_module.RequestContent, "get_json", side_effect=fake_get_json
+    )
+    tmdb_parser_module._tmdb_cache.clear()
+
+    assert await tmdb_parser("海盗战记", "zh", test=True) is None
+    assert tmdb_parser_module._tmdb_cache == {}
+    first = len(requests)
+    assert await tmdb_parser("海盗战记", "zh", test=True) is None
+    assert len(requests) == 2 * first
+
+
+async def test_tmdb_parser_failed_animation_check_does_not_cache_movie(mocker):
+    """判断动画的请求失败时不回退成电影，也不缓存。"""
+
+    async def fake_get_json(url: str) -> dict | None:
+        if "/search/tv" in url:
+            return {"results": [{"id": 82684}]}
+        if "/search/movie" in url:
+            return _MOVIE_SEARCH_RESULT
+        return None
+
+    mocker.patch.object(
+        tmdb_parser_module.RequestContent, "get_json", side_effect=fake_get_json
+    )
+    tmdb_parser_module._tmdb_cache.clear()
+
+    assert await tmdb_parser("海盗战记", "zh", test=True) is None
+    assert tmdb_parser_module._tmdb_cache == {}
diff --git a/backend/vulture_whitelist.py b/backend/vulture_whitelist.py
index 266ebecb..f3a36888 100644
--- a/backend/vulture_whitelist.py
+++ b/backend/vulture_whitelist.py
@@ -42,6 +42,9 @@ exc_value  # __aexit__
 traceback  # __aexit__
 hash_  # for 循环解包
 
+# --- 模块级 __getattr__（PEP 562）：解释器在属性缺失时调用 ---
+__getattr__
+
 # --- 测试 / e2e 支撑：生产路径不调用 ---
 _.check_single  # e2e worker
 _.set_renamed_path  # aria2 测试构造状态
diff --git a/webui/.storybook/main.ts b/webui/.storybook/main.ts
index c83ea5a6..f48fd73b 100644
--- a/webui/.storybook/main.ts
+++ b/webui/.storybook/main.ts
@@ -10,6 +10,13 @@ const config: StorybookConfig = {
   },
   viteFinal(config) {
     config.plugins?.push(Unocss());
+    // 故事用字符串 template 选项，需要完整版（含编译器）的 vue
+    const alias = config.resolve?.alias;
+    if (Array.isArray(alias)) {
+      config.resolve!.alias = alias.filter(
+        (a) => !(a.find instanceof RegExp && a.find.source === '^vue$')
+      );
+    }
     // Add other configuration here depending on your use case
     return config;
   },
diff --git a/webui/src/components/ab-bangumi-card.vue b/webui/src/components/ab-bangumi-card.vue
index eefca765..2dc6e979 100644
--- a/webui/src/components/ab-bangumi-card.vue
+++ b/webui/src/components/ab-bangumi-card.vue
@@ -200,18 +200,40 @@ const posterSrc = computed(() => resolvePosterUrl(bangumi.poster_link));
   display: block;
 }
 
-// Card glow animation when needs review - yellow
+// 待审核的黄色光晕：静态 box-shadow 放在 ::after 上，只动画 opacity（合成器线程，
+// 不触发每帧重绘）。光晕在海报外侧，所以这里取消 overflow 裁剪，由子元素继承圆角
 .card-poster--needs-review {
-  animation: card-glow 2.5s ease-in-out infinite;
+  overflow: visible;
+
+  > * {
+    border-radius: inherit;
+  }
+
+  &::after {
+    content: '';
+    position: absolute;
+    inset: 0;
+    border-radius: inherit;
+    box-shadow: 0 0 16px 4px rgba(251, 191, 36, 0.6);
+    pointer-events: none;
+    animation: card-glow 2.5s ease-in-out infinite;
+  }
+
+  @media (prefers-reduced-motion: reduce) {
+    &::after {
+      animation: none;
+      opacity: 0.5;
+    }
+  }
 }
 
 @keyframes card-glow {
   0%,
   100% {
-    box-shadow: var(--shadow-md), 0 0 0 0 rgba(251, 191, 36, 0);
+    opacity: 0;
   }
   50% {
-    box-shadow: var(--shadow-md), 0 0 16px 4px rgba(251, 191, 36, 0.6);
+    opacity: 1;
   }
 }
 
diff --git a/webui/src/components/ab-search-bar.vue b/webui/src/components/ab-search-bar.vue
index 5b9b8ecb..6b84a939 100644
--- a/webui/src/components/ab-search-bar.vue
+++ b/webui/src/components/ab-search-bar.vue
@@ -1,9 +1,13 @@
 <script lang="ts" setup>
-import AbSearchModal from './search/ab-search-modal.vue';
-
 const { showModal, provider, loading } = storeToRefs(useSearchStore());
 const { toggleModal, getProviders } = useSearchStore();
 
+// 搜索弹窗首次打开时才加载
+const { comp: SearchModal } = useLazyModal(
+  showModal,
+  () => import('./search/ab-search-modal.vue')
+);
+
 onMounted(() => {
   getProviders();
 });
@@ -18,5 +22,5 @@ onMounted(() => {
   />
 
   <!-- Search Modal -->
-  <AbSearchModal @close="toggleModal" />
+  <component :is="SearchModal" v-if="SearchModal" @close="toggleModal" />
 </template>
diff --git a/webui/src/components/layout/ab-topbar.vue b/webui/src/components/layout/ab-topbar.vue
index 7d97999e..ed0f305d 100644
--- a/webui/src/components/layout/ab-topbar.vue
+++ b/webui/src/components/layout/ab-topbar.vue
@@ -18,6 +18,10 @@ const { isMobile } = useBreakpointQuery();
 
 const showAccount = ref(false);
 const rssRule = ref(ruleTemplate);
+const { comp: AddRss, shown: addRssShown } = useLazyModal(
+  showAddRSS,
+  () => import('@/components/ab-add-rss.vue')
+);
 
 const { start, pause, shutdown, restart, resetRule } = useProgramStore();
 const { refreshPoster } = useBangumiStore();
@@ -138,7 +142,13 @@ onUnmounted(() => {
     </div>
 
     <ab-change-account v-model:show="showAccount" />
-    <ab-add-rss v-model:show="showAddRSS" v-model:rule="rssRule" />
+    <component
+      :is="AddRss"
+      v-if="AddRss"
+      v-model:rule="rssRule"
+      :show="addRssShown"
+      @update:show="showAddRSS = $event"
+    />
   </div>
 </template>
 
diff --git a/webui/src/components/search/ab-search-modal.vue b/webui/src/components/search/ab-search-modal.vue
index 24b8aeae..2865ccd7 100644
--- a/webui/src/components/search/ab-search-modal.vue
+++ b/webui/src/components/search/ab-search-modal.vue
@@ -615,12 +615,12 @@ function handleFilterClick(
 <template>
   <Teleport to="body">
     <!-- Backdrop -->
-    <transition name="overlay">
+    <transition name="overlay" appear>
       <div v-if="showModal" class="modal-backdrop" />
     </transition>
 
     <!-- Modal -->
-    <transition name="modal">
+    <transition name="modal" appear>
       <div
         v-if="showModal"
         class="modal-container"
diff --git a/webui/src/hooks/__tests__/useEventStream.test.ts b/webui/src/hooks/__tests__/useEventStream.test.ts
index 3a83ee52..7323ffd0 100644
--- a/webui/src/hooks/__tests__/useEventStream.test.ts
+++ b/webui/src/hooks/__tests__/useEventStream.test.ts
@@ -4,7 +4,7 @@
  * store) when available.
  */
 
-import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 import { ref } from 'vue';
 import { withSetup } from './test-utils';
 
@@ -59,12 +59,31 @@ async function freshEventStream() {
 }
 
 describe('useEventStream', () => {
+  // 单例在模块级注册 visibilitychange 监听且从不卸载；逐测试移除，避免旧实例串扰
+  const visibilityHandlers: EventListener[] = [];
+  const realAddEventListener = document.addEventListener.bind(document);
+
   beforeEach(() => {
+    vi.spyOn(document, 'addEventListener').mockImplementation(
+      (type: string, handler: unknown, opts?: unknown) => {
+        if (type === 'visibilitychange') {
+          visibilityHandlers.push(handler as EventListener);
+        }
+        realAddEventListener(type, handler as EventListener, opts as never);
+      }
+    );
     isLoggedIn.value = false;
     MockEventSource.instances = [];
     vi.stubGlobal('EventSource', MockEventSource);
   });
 
+  afterEach(() => {
+    for (const h of visibilityHandlers.splice(0)) {
+      document.removeEventListener('visibilitychange', h);
+    }
+    vi.restoreAllMocks();
+  });
+
   it('should open a connection to the events stream when logged in', async () => {
     isLoggedIn.value = true;
     const useEventStream = await freshEventStream();
@@ -176,4 +195,103 @@ describe('useEventStream', () => {
 
     expect(second).toHaveBeenCalledWith(1);
   });
+
+  it('should append log_append frames and replace on a log frame', async () => {
+    isLoggedIn.value = true;
+    const useEventStream = await freshEventStream();
+    const result = withSetup(() => useEventStream());
+    const es = MockEventSource.instances.at(-1)!;
+
+    es.emit('log_append', 'a\n');
+    expect(result.logData.value).toBe('a\n');
+    es.emit('log', 'snapshot\n');
+    es.emit('log_append', 'b\n');
+    expect(result.logData.value).toBe('snapshot\nb\n');
+    es.emit('log', 'rotated\n');
+    expect(result.logData.value).toBe('rotated\n');
+  });
+
+  it('should empty the log when a log_clear frame arrives', async () => {
+    isLoggedIn.value = true;
+    const useEventStream = await freshEventStream();
+    const result = withSetup(() => useEventStream());
+    const es = MockEventSource.instances.at(-1)!;
+
+    es.emit('log', 'stale\n');
+    es.emit('log_clear', '1');
+    expect(result.logData.value).toBe('');
+    es.emit('log_append', 'fresh\n');
+    expect(result.logData.value).toBe('fresh\n');
+  });
+
+  it('should trim the oldest lines when appended log exceeds the cap', async () => {
+    isLoggedIn.value = true;
+    const useEventStream = await freshEventStream();
+    const result = withSetup(() => useEventStream());
+    const es = MockEventSource.instances.at(-1)!;
+
+    const line = `${'x'.repeat(99)}\n`;
+    es.emit('log', line.repeat(5000));
+    es.emit('log_append', 'tail\n');
+    const text = result.logData.value!;
+    expect(text.length).toBeLessThanOrEqual(512 * 1024);
+    expect(text.endsWith('x\ntail\n')).toBe(true);
+    expect(text.startsWith(`${'x'.repeat(99)}\n`)).toBe(true);
+  });
+
+  describe('hidden tab', () => {
+    let hidden = false;
+    function setHidden(value: boolean) {
+      hidden = value;
+      document.dispatchEvent(new Event('visibilitychange'));
+    }
+
+    beforeEach(() => {
+      vi.useFakeTimers();
+      hidden = false;
+      vi.spyOn(document, 'hidden', 'get').mockImplementation(() => hidden);
+    });
+    afterEach(() => {
+      vi.useRealTimers();
+    });
+
+    it('should close the stream after 30 s hidden and reconnect on visible', async () => {
+      isLoggedIn.value = true;
+      const useEventStream = await freshEventStream();
+      const result = withSetup(() => useEventStream());
+      const es = MockEventSource.instances.at(-1)!;
+      es.onopen?.();
+      // 旧测试遗留的单例也会连接，故以当前数量为基线
+      const baseline = MockEventSource.instances.length;
+
+      setHidden(true);
+      vi.advanceTimersByTime(30_000);
+      expect(es.closed).toBe(true);
+      expect(result.connected.value).toBe(false);
+
+      // 隐藏期间不会重连
+      vi.advanceTimersByTime(60_000);
+      expect(MockEventSource.instances).toHaveLength(baseline);
+
+      setHidden(false);
+      expect(MockEventSource.instances).toHaveLength(baseline + 1);
+      expect(MockEventSource.instances.at(-1)!.closed).toBe(false);
+    });
+
+    it('should keep the stream when hidden for less than 30 s', async () => {
+      isLoggedIn.value = true;
+      const useEventStream = await freshEventStream();
+      withSetup(() => useEventStream());
+      const es = MockEventSource.instances.at(-1)!;
+      const baseline = MockEventSource.instances.length;
+
+      setHidden(true);
+      vi.advanceTimersByTime(29_000);
+      setHidden(false);
+      vi.advanceTimersByTime(60_000);
+
+      expect(es.closed).toBe(false);
+      expect(MockEventSource.instances).toHaveLength(baseline);
+    });
+  });
 });
diff --git a/webui/src/hooks/__tests__/useMyI18n.test.ts b/webui/src/hooks/__tests__/useMyI18n.test.ts
new file mode 100644
index 00000000..4d579a4b
--- /dev/null
+++ b/webui/src/hooks/__tests__/useMyI18n.test.ts
@@ -0,0 +1,38 @@
+/**
+ * Tests for useMyI18n: a slow locale import must not override a later switch.
+ */
+import { ref } from 'vue';
+import { flushPromises } from '@vue/test-utils';
+import { describe, expect, it, vi } from 'vitest';
+
+const gate = vi.hoisted(() => {
+  let release!: () => void;
+  const promise = new Promise<void>((r) => (release = r));
+  return { promise, release };
+});
+// setup.ts 把 createI18n 置空，这里换成带 locale ref 的最小实现
+vi.mock('vue-i18n', () => ({
+  createI18n: () => ({
+    global: { locale: ref('en'), setLocaleMessage: vi.fn(), t: vi.fn() },
+  }),
+}));
+vi.mock('@/i18n/zh-CN.json', async () => {
+  await gate.promise;
+  return { default: {} };
+});
+
+describe('useMyI18n', () => {
+  it('should keep the latest locale when an earlier import resolves late', async () => {
+    const { useMyI18n } = await import('@/hooks/useMyI18n');
+    const { lang, locale } = useMyI18n();
+    lang.value = 'zh-CN';
+    await flushPromises();
+    lang.value = 'en';
+    await flushPromises();
+    expect(locale.value).toBe('en');
+
+    gate.release();
+    await new Promise((r) => setTimeout(r, 50));
+    expect(locale.value).toBe('en');
+  });
+});
diff --git a/webui/src/hooks/useEventStream.ts b/webui/src/hooks/useEventStream.ts
index f0329c44..60c34a45 100644
--- a/webui/src/hooks/useEventStream.ts
+++ b/webui/src/hooks/useEventStream.ts
@@ -22,6 +22,10 @@ export interface BusEvent {
 
 const RECONNECT_BASE_DELAY_MS = 1000;
 const RECONNECT_MAX_DELAY_MS = 15000;
+/** 标签页持续隐藏超过该时长后关闭流，可见时重连（服务端重发快照） */
+const HIDDEN_CLOSE_DELAY_MS = 30000;
+/** 累积日志文本的上限，与后端 /log 的尾部读取预算一致 */
+const LOG_MAX_CHARS = 512 * 1024;
 
 /**
  * 单一 SSE 连接（api/v1/events/stream），推送 status/downloader/log 更新，
@@ -56,6 +60,9 @@ export const useEventStream = createSharedComposable(() => {
   let source: EventSource | null = null;
   let retryCount = 0;
   let retryTimer: ReturnType<typeof setTimeout> | undefined;
+  let hiddenTimer: ReturnType<typeof setTimeout> | undefined;
+  /** 因标签页长时间隐藏而主动关闭；此状态下不重连，直到页面可见 */
+  let suspended = false;
 
   function teardown() {
     source?.close();
@@ -71,7 +78,7 @@ export const useEventStream = createSharedComposable(() => {
     );
     retryCount += 1;
     retryTimer = setTimeout(() => {
-      if (isLoggedIn.value) connect();
+      if (isLoggedIn.value && !suspended) connect();
     }, delay);
   }
 
@@ -111,6 +118,22 @@ export const useEventStream = createSharedComposable(() => {
       logData.value = (e as MessageEvent).data;
     });
 
+    // EventSource 不派发 data 为空的事件，空日志由服务端改推 log_clear
+    es.addEventListener('log_clear', () => {
+      logData.value = '';
+    });
+
+    es.addEventListener('log_append', (e) => {
+      const text = (logData.value ?? '') + (e as MessageEvent).data;
+      if (text.length <= LOG_MAX_CHARS) {
+        logData.value = text;
+        return;
+      }
+      // 超出上限时丢弃最旧部分，并对齐到下一行起点
+      const tail = text.slice(text.length - LOG_MAX_CHARS);
+      logData.value = tail.slice(tail.indexOf('\n') + 1);
+    });
+
     es.addEventListener('update', (e) => {
       try {
         updateData.value = JSON.parse((e as MessageEvent).data);
@@ -153,10 +176,28 @@ export const useEventStream = createSharedComposable(() => {
 
   function stop() {
     clearTimeout(retryTimer);
+    clearTimeout(hiddenTimer);
+    suspended = false;
     retryCount = 0;
     teardown();
   }
 
+  function onVisibilityChange() {
+    clearTimeout(hiddenTimer);
+    if (document.hidden) {
+      hiddenTimer = setTimeout(() => {
+        suspended = true;
+        clearTimeout(retryTimer);
+        teardown();
+      }, HIDDEN_CLOSE_DELAY_MS);
+    } else if (suspended) {
+      suspended = false;
+      retryCount = 0;
+      if (isLoggedIn.value) connect();
+    }
+  }
+  document.addEventListener('visibilitychange', onVisibilityChange);
+
   // 生命周期跟随登录状态，而非某个调用方组件的挂载/卸载——这是一个跨组件
   // 共享的单例连接（createSharedComposable），不能绑定到任意一个消费者的
   // onBeforeUnmount 上。
diff --git a/webui/src/hooks/useLazyModal.ts b/webui/src/hooks/useLazyModal.ts
new file mode 100644
index 00000000..f70d8082
--- /dev/null
+++ b/webui/src/hooks/useLazyModal.ts
@@ -0,0 +1,41 @@
+import type { Component, Ref } from 'vue';
+
+/**
+ * 弹窗首次打开时才加载并挂载。
+ * `comp` 就绪后才渲染，`shown` 在挂载后的下一拍再置为 true，
+ * 这样 NModal 的进入过渡（appear）仍然生效。
+ */
+export function useLazyModal(
+  open: Ref<boolean>,
+  load: () => Promise<{ default: Component }>
+) {
+  const comp = shallowRef<Component>();
+  const shown = ref(false);
+
+  watch(
+    open,
+    async (val) => {
+      if (val && !comp.value) {
+        try {
+          comp.value = (await load()).default;
+        } catch {
+          // 升级后旧的分包 404：整页刷新一次拿新入口，sessionStorage 标记防止循环刷新
+          try {
+            if (!sessionStorage.getItem('lazy-modal-reload')) {
+              sessionStorage.setItem('lazy-modal-reload', '1');
+              location.reload();
+            }
+          } catch {
+            // sessionStorage 不可用时不刷新，避免无限循环
+          }
+          return;
+        }
+        await nextTick();
+      }
+      shown.value = open.value;
+    },
+    { immediate: true }
+  );
+
+  return { comp, shown };
+}
diff --git a/webui/src/hooks/useMyI18n.ts b/webui/src/hooks/useMyI18n.ts
index 00c7ea7a..b759d656 100644
--- a/webui/src/hooks/useMyI18n.ts
+++ b/webui/src/hooks/useMyI18n.ts
@@ -1,15 +1,9 @@
 import { createI18n } from 'vue-i18n';
 import { createSharedComposable, useLocalStorage } from '@vueuse/core';
 import enUS from '@/i18n/en.json';
-import zhCN from '@/i18n/zh-CN.json';
 import type { ApiSuccess } from '#/api';
 
-const messages = {
-  en: enUS,
-  'zh-CN': zhCN,
-};
-
-type Languages = keyof typeof messages;
+type Languages = 'en' | 'zh-CN';
 
 function normalizeLocale(locale: string): Languages {
   if (locale.startsWith('zh')) return 'zh-CN';
@@ -20,19 +14,44 @@ export const i18n = createI18n({
   legacy: false,
   locale: normalizeLocale(navigator.language),
   fallbackLocale: 'en',
-  messages,
+  // zh-CN 先放空壳以固定语言类型，真正的消息由 loadLocale 载入
+  messages: { en: enUS, 'zh-CN': {} },
 });
 
+// 默认语言（en）静态打包；其它语言首次使用时才加载
+const loaded = new Set<Languages>(['en']);
+
+export async function loadLocale(locale: Languages) {
+  if (loaded.has(locale)) return;
+  const { default: msgs } = await import('@/i18n/zh-CN.json');
+  i18n.global.setLocaleMessage(locale, msgs);
+  loaded.add(locale);
+}
+
+/** 首次渲染前预载已保存的语言，避免先闪出英文 */
+export function loadSavedLocale() {
+  let saved: string | null = null;
+  try {
+    saved = localStorage.getItem('lang');
+  } catch {
+    // 隐私模式等场景下读取会抛错，回退到浏览器语言
+  }
+  return loadLocale(normalizeLocale(saved ?? navigator.language));
+}
+
 export const useMyI18n = createSharedComposable(() => {
   const lang = useLocalStorage<Languages>(
     'lang',
     normalizeLocale(navigator.language)
   );
 
-  i18n.global.locale.value = lang.value as unknown as Languages;
+  i18n.global.locale.value = lang.value;
 
-  watch(lang, (val) => {
-    i18n.global.locale.value = val as unknown as Languages;
+  // 先加载语言包再切换，切换期间沿用旧语言
+  watch(lang, async (val) => {
+    await loadLocale(val);
+    // 慢的导入返回时用户可能已切到别的语言，只应用最新一次
+    if (lang.value === val) i18n.global.locale.value = val;
   });
 
   function changeLocale() {
diff --git a/webui/src/main.ts b/webui/src/main.ts
index 97132439..e7e5459d 100644
--- a/webui/src/main.ts
+++ b/webui/src/main.ts
@@ -1,7 +1,7 @@
 import { createApp } from 'vue';
 import { createPinia } from 'pinia';
 import { router } from './router';
-import { i18n } from './hooks/useMyI18n';
+import { i18n, loadSavedLocale } from './hooks/useMyI18n';
 import App from './App.vue';
 
 import '@unocss/reset/tailwind-compat.css';
@@ -13,4 +13,8 @@ const app = createApp(App);
 app.use(router);
 app.use(pinia);
 app.use(i18n);
-app.mount('#app');
+// 已保存的语言包加载完再渲染，避免先闪出英文
+// 加载失败也要挂载，回退到默认语言
+loadSavedLocale()
+  .catch(() => {})
+  .then(() => app.mount('#app'));
diff --git a/webui/src/pages/index.vue b/webui/src/pages/index.vue
index a82fa75a..7678e07b 100644
--- a/webui/src/pages/index.vue
+++ b/webui/src/pages/index.vue
@@ -8,6 +8,14 @@ definePage({
 });
 
 const { editRule } = storeToRefs(useBangumiStore());
+const editRuleOpen = computed({
+  get: () => editRule.value.show,
+  set: (val) => (editRule.value.show = val),
+});
+const { comp: EditRule, shown: editRuleShown } = useLazyModal(
+  editRuleOpen,
+  () => import('@/components/ab-edit-rule.vue')
+);
 
 // 插件页面的标题取自清单（清单到达前留空，避免闪出路由名 Plugin；清单已到达
 // 或加载失败仍无匹配页面时回退为插件 id）；插件市场用翻译后的标题，其它页面沿用路由名
@@ -74,9 +82,12 @@ function onApplyRule(rule: BangumiRule) {
       </div>
     </main>
 
-    <ab-edit-rule
-      v-model:show="editRule.show"
+    <component
+      :is="EditRule"
+      v-if="EditRule"
       v-model:rule="editRule.item"
+      :show="editRuleShown"
+      @update:show="editRuleOpen = $event"
       @enable="onEnableRule"
       @archive="onArchiveRule"
       @unarchive="onUnarchiveRule"
diff --git a/webui/src/pages/index/downloader.test.ts b/webui/src/pages/index/downloader.test.ts
new file mode 100644
index 00000000..b62fbe1c
--- /dev/null
+++ b/webui/src/pages/index/downloader.test.ts
@@ -0,0 +1,158 @@
+import { flushPromises, mount } from '@vue/test-utils';
+import { createPinia, setActivePinia } from 'pinia';
+import { ref } from 'vue';
+import type { Component } from 'vue';
+import { beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
+import { useConfigStore } from '@/store/config';
+import { useDownloaderStore } from '@/store/downloader';
+import { mockConfig } from '@/test/mocks/api';
+import type { Config } from '#/config';
+import type { QbTorrentInfo } from '#/downloader';
+
+// happy-dom 没有布局：给虚拟列表一个固定视口高度，否则一行都不渲染。
+// 必须在 naive-ui（vueuc 的 ResizeObserver 单例）加载前替换
+vi.hoisted(() => {
+  class FixedResizeObserver {
+    callback: ResizeObserverCallback;
+    constructor(callback: ResizeObserverCallback) {
+      this.callback = callback;
+    }
+
+    observe(target: Element) {
+      const entry = { target, contentRect: { width: 1000, height: 600 } };
+      this.callback(
+        [entry as unknown as ResizeObserverEntry],
+        this as unknown as ResizeObserver
+      );
+    }
+
+    unobserve() {}
+    disconnect() {}
+  }
+  globalThis.ResizeObserver = FixedResizeObserver;
+});
+
+const downloaderData = ref<QbTorrentInfo[] | null>(null);
+
+vi.mock('@/hooks/useEventStream', () => ({
+  useEventStream: () => ({ connected: ref(true), downloaderData }),
+}));
+
+vi.mock('@/utils/axios', () => ({
+  axios: { get: vi.fn(), post: vi.fn() },
+}));
+
+vi.mock('@/api/downloader', () => ({
+  apiDownloader: {
+    getTorrents: vi.fn().mockResolvedValue([]),
+    instances: vi.fn().mockResolvedValue({ default: '', instances: [] }),
+  },
+}));
+
+vi.mock('@/hooks/useMyI18n', () => ({
+  useMyI18n: () => ({
+    t: (key: string) => key,
+    returnUserLangMsg: () => '',
+  }),
+}));
+
+vi.mock('@/hooks/useMessage', () => ({
+  useMessage: () => ({ success: vi.fn(), error: vi.fn() }),
+}));
+
+function torrent(
+  hash: string,
+  savePath: string,
+  progress = 0.5
+): QbTorrentInfo {
+  return {
+    hash,
+    name: `torrent-${hash}`,
+    size: 1024,
+    progress,
+    dlspeed: 0,
+    upspeed: 0,
+    num_seeds: 0,
+    num_leechs: 0,
+    state: 'downloading',
+    eta: 0,
+    category: 'Bangumi',
+    save_path: savePath,
+    added_on: 0,
+    downloader_id: 'default',
+  };
+}
+
+describe('Downloader page', () => {
+  let DownloaderPage: Component;
+
+  beforeAll(async () => {
+    vi.stubGlobal('definePage', vi.fn());
+    // vitest 的自动导入不含 @vueuse/core
+    vi.stubGlobal('useIntervalFn', () => ({ pause: vi.fn(), resume: vi.fn() }));
+    DownloaderPage = (await import('./downloader.vue')).default;
+  });
+
+  beforeEach(() => {
+    setActivePinia(createPinia());
+    useConfigStore().config = mockConfig as unknown as Config;
+    downloaderData.value = null;
+  });
+
+  async function mountPage() {
+    const wrapper = mount(DownloaderPage, {
+      attachTo: document.body,
+      global: { stubs: { 'ab-button': true, RouterLink: true } },
+    });
+    // 首帧在挂载后到达，与真实 SSE 一致（store 的 watch 不是 immediate）
+    downloaderData.value = [
+      torrent('a1', '/dl/Show A'),
+      torrent('a2', '/dl/Show A'),
+      torrent('b1', '/dl/Show B'),
+    ];
+    await flushPromises();
+    return wrapper;
+  }
+
+  function rowOf(wrapper: Awaited<ReturnType<typeof mountPage>>, text: string) {
+    const row = wrapper
+      .findAll('.n-data-table-tbody .n-data-table-tr')
+      .find((r) => r.text().includes(text));
+    if (!row) throw new Error(`row not found: ${text}`);
+    return row;
+  }
+
+  it('should update the row when the store receives a new SSE payload', async () => {
+    const wrapper = await mountPage();
+    expect(rowOf(wrapper, 'torrent-a1').text()).toContain('50%');
+
+    downloaderData.value = [torrent('a1', '/dl/Show A', 1)];
+    await flushPromises();
+
+    expect(rowOf(wrapper, 'torrent-a1').text()).toContain('100%');
+  });
+
+  it('should select every torrent of the group when its header checkbox is checked', async () => {
+    const wrapper = await mountPage();
+
+    await rowOf(wrapper, 'Show A (2)').find('.n-checkbox').trigger('click');
+
+    expect([...useDownloaderStore().selectedKeys].sort()).toEqual([
+      'default:a1',
+      'default:a2',
+    ]);
+    expect(wrapper.find('.action-bar-count').text()).toContain('2');
+  });
+
+  it('should hide the group rows when the group is collapsed', async () => {
+    const wrapper = await mountPage();
+
+    await rowOf(wrapper, 'Show A (2)')
+      .find('.n-data-table-expand-trigger')
+      .trigger('click');
+
+    const text = wrapper.find('.n-data-table-tbody').text();
+    expect(text).not.toContain('torrent-a1');
+    expect(text).toContain('torrent-b1');
+  });
+});
diff --git a/webui/src/pages/index/downloader.vue b/webui/src/pages/index/downloader.vue
index 04ca376d..b4e9e200 100644
--- a/webui/src/pages/index/downloader.vue
+++ b/webui/src/pages/index/downloader.vue
@@ -1,5 +1,10 @@
 <script lang="ts" setup>
-import { type DataTableColumns, NDataTable } from 'naive-ui';
+import type { VNodeChild } from 'vue';
+import {
+  type DataTableColumns,
+  type DataTableRowKey,
+  NDataTable,
+} from 'naive-ui';
 import AbProgress from '@/components/basic/ab-progress.vue';
 import AbTag from '@/components/basic/ab-tag.vue';
 import { useConfirm } from '@/hooks/useConfirm';
@@ -20,8 +25,6 @@ const {
   pauseSelected,
   resumeSelected,
   deleteSelected,
-  toggleKey,
-  toggleGroup,
   clearSelection,
 } = useDownloaderStore();
 const { confirm } = useConfirm();
@@ -120,30 +123,89 @@ function stateType(state: string): 'neutral' | 'success' | 'info' | 'danger' {
   return 'info';
 }
 
-function isGroupAllSelected(group: TorrentGroup): boolean {
-  return group.torrents.every((t) =>
-    selectedKeys.value.includes(torrentKey(t))
+/** 分组头行：同一个虚拟表里以树形父行显示，children 为该组的种子 */
+interface GroupRow {
+  key: string;
+  group: TorrentGroup;
+  children: QbTorrentInfo[];
+}
+type Row = QbTorrentInfo | GroupRow;
+
+function isGroupRow(row: Row): row is GroupRow {
+  return 'group' in row;
+}
+
+function rowKey(row: Row): string {
+  return isGroupRow(row) ? row.key : torrentKey(row);
+}
+
+function rowClassName(row: Row): string {
+  return isGroupRow(row) ? 'group-row' : '';
+}
+
+/** 分组头行的名称格跨满其余列，种子列的渲染只处理种子行 */
+function torrentCell(render: (row: QbTorrentInfo) => VNodeChild) {
+  return (row: Row) => (isGroupRow(row) ? null : render(row));
+}
+
+const rows = computed<GroupRow[]>(() =>
+  groups.value.map((group) => ({
+    key: `group:${group.savePath}`,
+    group,
+    children: group.torrents,
+  }))
+);
+
+// 记录折叠的分组，新出现的分组默认展开
+const collapsed = shallowRef(new Set<string>());
+const expandedKeys = computed(() =>
+  rows.value.filter((r) => !collapsed.value.has(r.key)).map((r) => r.key)
+);
+
+function onExpandedChange(keys: DataTableRowKey[]) {
+  const open = new Set(keys);
+  collapsed.value = new Set(
+    rows.value.map((r) => r.key).filter((k) => !open.has(k))
+  );
+}
+
+const checkedKeys = computed(() => [...selectedKeys.value]);
+
+// 级联勾选会带上分组头的键，只保留种子键
+function onCheckedChange(keys: DataTableRowKey[]) {
+  const groupKeys = new Set(rows.value.map((r) => r.key));
+  selectedKeys.value = new Set(
+    keys.filter((k) => !groupKeys.has(k as string)) as string[]
   );
 }
 
 // 多个下载器实例时标出每个种子所在的实例
 const downloaders = useDownloaderInstances();
 
-const tableColumnsValue = computed<DataTableColumns<QbTorrentInfo>>(() => [
+const tableColumnsValue = computed<DataTableColumns<Row>>(() => [
   {
     type: 'selection',
   },
   {
     title: t('downloader.torrent.name'),
     key: 'name',
-    ellipsis: { tooltip: true },
+    // CSS 省略号 + title：不用逐行测量宽度的 tooltip
+    ellipsis: true,
+    className: 'name-col',
     minWidth: 200,
+    colSpan: (row: Row): number =>
+      isGroupRow(row) ? tableColumnsValue.value.length - 1 : 1,
+    cellProps: (row) => ({
+      title: isGroupRow(row) ? row.group.savePath : row.name,
+    }),
+    render: (row) =>
+      isGroupRow(row) ? `${row.group.name} (${row.group.count})` : row.name,
   },
   {
     title: t('downloader.torrent.progress'),
     key: 'progress',
     width: 160,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return h(AbProgress, {
         value: row.progress * 100,
         label: `${Math.round(row.progress * 100)}%`,
@@ -152,58 +214,58 @@ const tableColumnsValue = computed<DataTableColumns<QbTorrentInfo>>(() => [
             ? 'error'
             : 'active',
       });
-    },
+    }),
   },
   {
     title: t('downloader.torrent.status'),
     key: 'state',
     width: 100,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return h(AbTag, {
         type: stateType(row.state),
         title: stateLabel(row.state),
       });
-    },
+    }),
   },
   {
     title: t('downloader.torrent.size'),
     key: 'size',
     width: 100,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return formatSize(row.size);
-    },
+    }),
   },
   {
     title: t('downloader.torrent.dlspeed'),
     key: 'dlspeed',
     width: 110,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return formatSpeed(row.dlspeed);
-    },
+    }),
   },
   {
     title: t('downloader.torrent.upspeed'),
     key: 'upspeed',
     width: 110,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return formatSpeed(row.upspeed);
-    },
+    }),
   },
   {
     title: 'ETA',
     key: 'eta',
     width: 80,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return formatEta(row.eta);
-    },
+    }),
   },
   {
     title: t('downloader.torrent.peers'),
     key: 'peers',
     width: 110,
-    render(row: QbTorrentInfo) {
+    render: torrentCell((row) => {
       return `${row.num_seeds} / ${row.num_leechs}`;
-    },
+    }),
   },
   // 放在最后并完整显示 id（触屏没有悬停提示）
   ...(downloaders.multiple.value
@@ -216,20 +278,6 @@ const tableColumnsValue = computed<DataTableColumns<QbTorrentInfo>>(() => [
       ]
     : []),
 ]);
-
-function onCheckedChange(group: TorrentGroup, keys: string[]) {
-  const groupKeys = group.torrents.map(torrentKey);
-  const otherSelected = selectedKeys.value.filter(
-    (k) => !groupKeys.includes(k)
-  );
-  selectedKeys.value = [...otherSelected, ...keys];
-}
-
-function groupCheckedKeys(group: TorrentGroup): string[] {
-  return group.torrents
-    .map(torrentKey)
-    .filter((k) => selectedKeys.value.includes(k));
-}
 </script>
 
 <template>
@@ -302,30 +350,29 @@ function groupCheckedKeys(group: TorrentGroup): string[] {
         {{ $t('downloader.empty_torrents') }}
       </div>
 
-      <div v-else class="downloader-groups">
-        <ab-fold-panel
-          v-for="group in groups"
-          :key="group.savePath"
-          :title="`${group.name} (${group.count})`"
-          :default-open="true"
-        >
-          <NDataTable
-            :columns="tableColumnsValue"
-            :data="group.torrents"
-            :row-key="torrentKey"
-            :pagination="false"
-            :bordered="false"
-            :checked-row-keys="groupCheckedKeys(group)"
-            size="small"
-            @update:checked-row-keys="(keys: any) => onCheckedChange(group, keys as string[])"
-          />
-        </ab-fold-panel>
-      </div>
+      <!-- 单个虚拟滚动表：只渲染可见行；不放进 NCollapseItem，SSE 数据才能刷新行 -->
+      <NDataTable
+        v-else
+        class="downloader-table"
+        :columns="tableColumnsValue"
+        :data="rows"
+        :row-key="rowKey"
+        :row-class-name="rowClassName"
+        :pagination="false"
+        :bordered="false"
+        :checked-row-keys="checkedKeys"
+        :expanded-row-keys="expandedKeys"
+        virtual-scroll
+        flex-height
+        size="small"
+        @update:checked-row-keys="onCheckedChange"
+        @update:expanded-row-keys="onExpandedChange"
+      />
 
       <Transition name="fade">
-        <div v-if="selectedKeys.length > 0" class="action-bar">
+        <div v-if="selectedKeys.size > 0" class="action-bar">
           <span class="action-bar-count">
-            {{ selectedKeys.length }} {{ $t('downloader.selected') }}
+            {{ selectedKeys.size }} {{ $t('downloader.selected') }}
           </span>
           <div class="action-bar-buttons">
             <ab-button variant="primary" size="sm" @click="resumeSelected">
@@ -354,6 +401,7 @@ function groupCheckedKeys(group: TorrentGroup): string[] {
 .page-downloader {
   overflow: auto;
   flex-grow: 1;
+  min-height: 0;
   display: flex;
   flex-direction: column;
 }
@@ -362,14 +410,28 @@ function groupCheckedKeys(group: TorrentGroup): string[] {
   display: flex;
   flex-direction: column;
   flex: 1;
+  min-height: 0;
   gap: 12px;
   padding-bottom: 60px;
 }
 
-.downloader-groups {
-  display: flex;
-  flex-direction: column;
-  gap: 12px;
+// flex-height：表格填满页面剩余高度，虚拟滚动在表体内进行
+.downloader-table {
+  flex: 1;
+  min-height: 0;
+
+  :deep(.group-row .n-data-table-td) {
+    font-weight: 600;
+  }
+
+  // 树形缩进与展开按钮占 40px，名称不换行到下一行
+  :deep(.name-col) {
+    white-space: nowrap;
+  }
+
+  :deep(.name-col .n-data-table-td__ellipsis) {
+    max-width: calc(100% - 40px);
+  }
 }
 
 .downloader-empty {
diff --git a/webui/src/store/__tests__/downloader.test.ts b/webui/src/store/__tests__/downloader.test.ts
index c2a20800..51b4f90d 100644
--- a/webui/src/store/__tests__/downloader.test.ts
+++ b/webui/src/store/__tests__/downloader.test.ts
@@ -1,11 +1,12 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest';
-import { ref } from 'vue';
+import { nextTick, ref } from 'vue';
 import { apiDownloader } from '@/api/downloader';
 import {
   hasConfiguredDownloader,
   torrentKey,
   useDownloaderStore,
 } from '@/store/downloader';
+import type { Ref } from 'vue';
 import type { QbTorrentInfo } from '#/downloader';
 import type { PluginInstance } from '#/config';
 
@@ -18,8 +19,14 @@ vi.mock('@/api/downloader', () => ({
   },
 }));
 
+const downloaderData = vi.hoisted(() => ({
+  current: null as Ref<QbTorrentInfo[] | null> | null,
+}));
 vi.mock('@/hooks/useEventStream', () => ({
-  useEventStream: () => ({ downloaderData: ref(null) }),
+  useEventStream: () => {
+    downloaderData.current = ref(null);
+    return { downloaderData: downloaderData.current };
+  },
 }));
 
 vi.mock('@/hooks/useApi', () => ({
@@ -59,7 +66,7 @@ describe('downloader store', () => {
       torrent('a2', 'default'),
       torrent('a3', 'default'),
     ];
-    store.selectedKeys = store.torrents.slice(0, 3).map(torrentKey);
+    store.selectedKeys = new Set(store.torrents.slice(0, 3).map(torrentKey));
 
     await store.pauseSelected();
     await store.deleteSelected(true);
@@ -77,7 +84,7 @@ describe('downloader store', () => {
   it('should act only on the selected instance when the same hash is in two instances', async () => {
     const store = useDownloaderStore();
     store.torrents = [torrent('h', 'home'), torrent('h', 'seedbox')];
-    store.selectedKeys = [torrentKey(store.torrents[1])];
+    store.selectedKeys = new Set([torrentKey(store.torrents[1])]);
 
     await store.pauseSelected();
 
@@ -98,7 +105,7 @@ describe('downloader store', () => {
     async (_, failure) => {
       const store = useDownloaderStore();
       store.torrents = [torrent('a', 'home'), torrent('b', 'seedbox')];
-      store.selectedKeys = store.torrents.map(torrentKey);
+      store.selectedKeys = new Set(store.torrents.map(torrentKey));
       vi.mocked(apiDownloader.deleteTorrents).mockImplementationOnce(failure);
 
       await expect(store.deleteSelected(false)).rejects.toBeTruthy();
@@ -110,10 +117,28 @@ describe('downloader store', () => {
     }
   );
 
+  it('should discard an HTTP response when an SSE frame arrived during the request', async () => {
+    const store = useDownloaderStore();
+    let respond!: (list: QbTorrentInfo[]) => void;
+    vi.mocked(apiDownloader.getTorrents).mockReturnValueOnce(
+      new Promise((resolve) => {
+        respond = resolve;
+      })
+    );
+
+    const request = store.getAll();
+    downloaderData.current!.value = [torrent('fresh', 'home')];
+    await nextTick();
+    respond([torrent('fresh', 'home'), torrent('deleted', 'home')]);
+    await request;
+
+    expect(store.torrents.map((t) => t.hash)).toEqual(['fresh']);
+  });
+
   it('should show the failure message when an instance returns status false', async () => {
     const store = useDownloaderStore();
     store.torrents = [torrent('a', 'home')];
-    store.selectedKeys = store.torrents.map(torrentKey);
+    store.selectedKeys = new Set(store.torrents.map(torrentKey));
     vi.mocked(apiDownloader.deleteTorrents).mockResolvedValueOnce({
       status: false,
       msg_en: 'Failed to delete torrents',
diff --git a/webui/src/store/downloader.ts b/webui/src/store/downloader.ts
index 8d15b5b9..3488a243 100644
--- a/webui/src/store/downloader.ts
+++ b/webui/src/store/downloader.ts
@@ -14,13 +14,18 @@ export function hasConfiguredDownloader(instances: PluginInstance[]): boolean {
 
 export const useDownloaderStore = defineStore('downloader', () => {
   const torrents = shallowRef<QbTorrentInfo[]>([]);
-  const selectedKeys = ref<string[]>([]);
+  // Set 而不是响应式数组：成员判断 O(1)，整体替换触发更新
+  const selectedKeys = shallowRef(new Set<string>());
   const loading = ref(false);
 
   const { downloaderData } = useEventStream();
+  // SSE 帧计数：getAll 请求期间收到过新帧时丢弃 HTTP 结果——服务端只在
+  // 负载变化时重推，旧响应覆盖新帧后已删除的种子会一直留在列表里。
+  let sseFrames = 0;
   // SSE 已连接时使用推送数据，省去 downloader.vue 页面自己的 5s 轮询请求。
   watch(downloaderData, (data) => {
     if (data === null) return;
+    sseFrames += 1;
     torrents.value = data;
   });
 
@@ -65,8 +70,10 @@ export const useDownloaderStore = defineStore('downloader', () => {
 
   async function getAll() {
     loading.value = true;
+    const frames = sseFrames;
     try {
-      torrents.value = await apiDownloader.getTorrents();
+      const data = await apiDownloader.getTorrents();
+      if (frames === sseFrames) torrents.value = data;
     } catch {
       // Keep the last known list — a failed 5s poll (e.g. during a backend
       // restart) must not blank the page into a fake "no torrents" state.
@@ -82,7 +89,7 @@ export const useDownloaderStore = defineStore('downloader', () => {
   const opts = {
     showMessage: true,
     onSuccess() {
-      selectedKeys.value = [];
+      selectedKeys.value = new Set();
     },
     onFinally: getAll,
   };
@@ -97,7 +104,7 @@ export const useDownloaderStore = defineStore('downloader', () => {
   ) {
     const byInstance = new Map<string, string[]>();
     for (const t of torrents.value) {
-      if (!selectedKeys.value.includes(torrentKey(t))) continue;
+      if (!selectedKeys.value.has(torrentKey(t))) continue;
       const hashes = byInstance.get(t.downloader_id) ?? [];
       hashes.push(t.hash);
       byInstance.set(t.downloader_id, hashes);
@@ -134,30 +141,8 @@ export const useDownloaderStore = defineStore('downloader', () => {
     opts
   );
 
-  function toggleKey(key: string) {
-    const idx = selectedKeys.value.indexOf(key);
-    if (idx === -1) {
-      selectedKeys.value.push(key);
-    } else {
-      selectedKeys.value.splice(idx, 1);
-    }
-  }
-
-  function toggleGroup(group: TorrentGroup) {
-    const groupKeys = group.torrents.map(torrentKey);
-    const allSelected = groupKeys.every((k) => selectedKeys.value.includes(k));
-    if (allSelected) {
-      selectedKeys.value = selectedKeys.value.filter(
-        (k) => !groupKeys.includes(k)
-      );
-    } else {
-      const toAdd = groupKeys.filter((k) => !selectedKeys.value.includes(k));
-      selectedKeys.value.push(...toAdd);
-    }
-  }
-
   function clearSelection() {
-    selectedKeys.value = [];
+    selectedKeys.value = new Set();
   }
 
   return {
@@ -170,8 +155,6 @@ export const useDownloaderStore = defineStore('downloader', () => {
     pauseSelected,
     resumeSelected,
     deleteSelected,
-    toggleKey,
-    toggleGroup,
     clearSelection,
   };
 });
diff --git a/webui/types/dts/auto-imports.d.ts b/webui/types/dts/auto-imports.d.ts
index ecb80503..c323dc3c 100644
--- a/webui/types/dts/auto-imports.d.ts
+++ b/webui/types/dts/auto-imports.d.ts
@@ -67,6 +67,8 @@ declare global {
   const isRef: typeof import('vue').isRef
   const isShallow: typeof import('vue').isShallow
   const isValidNexusPhpCategoryIds: typeof import('../../src/utils/nexusphp').isValidNexusPhpCategoryIds
+  const loadLocale: typeof import('../../src/hooks/useMyI18n').loadLocale
+  const loadSavedLocale: typeof import('../../src/hooks/useMyI18n').loadSavedLocale
   const localizeFields: typeof import('../../src/utils/plugin-text').localizeFields
   const mapActions: typeof import('pinia').mapActions
   const mapGetters: typeof import('pinia').mapGetters
@@ -150,6 +152,7 @@ declare global {
   const useI18n: typeof import('vue-i18n').useI18n
   const useId: typeof import('vue').useId
   const useIntervalFn: typeof import('@vueuse/core').useIntervalFn
+  const useLazyModal: typeof import('../../src/hooks/useLazyModal').useLazyModal
   const useLocalStorage: typeof import('@vueuse/core').useLocalStorage
   const useLogStore: typeof import('../../src/store/log').useLogStore
   const useMessage: typeof import('../../src/hooks/useMessage').useMessage
diff --git a/webui/vite.config.ts b/webui/vite.config.ts
index 67e1ca63..ff1d6478 100644
--- a/webui/vite.config.ts
+++ b/webui/vite.config.ts
@@ -46,6 +46,7 @@ export default defineConfig({
     }),
     VueI18nPlugin({
       include: resolve(import.meta.dirname, './src/i18n/**'),
+      dropMessageCompiler: true,
     }),
   ],
   css: {
@@ -61,7 +62,13 @@ export default defineConfig({
       output: { minify: { compress: { dropConsole: true } } },
     },
   },
-  resolve: { tsconfigPaths: true },
+  resolve: {
+    tsconfigPaths: true,
+    // 只用运行时：模板都在构建期编译，不需要打包 @vue/compiler-*
+    alias: [
+      { find: /^vue$/, replacement: 'vue/dist/vue.runtime.esm-bundler.js' },
+    ],
+  },
   preview: { headers },
   server: {
     proxy: {