diff --git a/Dockerfile b/Dockerfile
index e7e0bd3..a3c0dd3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -100,7 +100,9 @@ VOLUME ["/data", "/models"]
 # "Unable to load libcudnn_ops.so.9"。放在 final/dev 而非 deps，避免 ENV 变化
 # 导致 deps 的 apt/pip 层缓存失效。CPU 镜像无此目录，路径被忽略不影响。
 ENV CONFIG_PATH=/app/config.yaml \
-    LD_LIBRARY_PATH=/usr/local/lib/python3.12/site-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/site-packages/nvidia/cublas/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cublas/lib
+    LD_LIBRARY_PATH=/usr/local/lib/python3.12/site-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/site-packages/nvidia/cublas/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cublas/lib \
+    HF_HUB_OFFLINE=1 \
+    TRANSFORMERS_OFFLINE=1
 
 EXPOSE 8000
 CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]
@@ -118,7 +120,9 @@ COPY config.example.yaml /app/config.example.yaml
 # 全部走 volume，镜像本身无状态、无敏感数据
 VOLUME ["/data", "/models"]
 ENV CONFIG_PATH=/app/config.yaml \
-    LD_LIBRARY_PATH=/usr/local/lib/python3.12/site-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/site-packages/nvidia/cublas/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cublas/lib
+    LD_LIBRARY_PATH=/usr/local/lib/python3.12/site-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cudnn/lib:/usr/local/lib/python3.12/site-packages/nvidia/cublas/lib:/usr/local/lib/python3.12/dist-packages/nvidia/cublas/lib \
+    HF_HUB_OFFLINE=1 \
+    TRANSFORMERS_OFFLINE=1
 
 EXPOSE 8000
 CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/app/config.py b/app/config.py
index 3369ed3..3d505ac 100644
--- a/app/config.py
+++ b/app/config.py
@@ -128,13 +128,111 @@ def _load_yaml(path: Path) -> dict:
     return yaml.safe_load(path.read_text(encoding="utf-8")) or {}
 
 
+# ---------------- 运行时覆盖 ----------------
+# 允许通过设置页修改的配置项（点分路径 -> 类型）。config.yaml 是只读挂载，
+# 改它需重启容器；运行时覆盖存 DB，进程重启后自动加载，无需重建镜像。
+# 设置页保存时调 save_setting() 写 DB + 清 lru_cache，下次 get_settings() 生效。
+_applying_overrides = False  # 防递归标志：_apply_overrides 内部 DB 初始化会回调 get_settings()
+_OVERIDEABLE_FIELDS: dict[str, type] = {
+    "asr.batch_size": int,
+    "asr.beam_size": int,
+    "translation.batch_size": int,
+    "translation.sort_by_length": bool,
+}
+
+
+def _apply_overrides(settings: Settings) -> Settings:
+    """从 DB 读取覆盖值并应用到 Settings 对象。
+
+    在 lru_cache 的 get_settings() 内部调用，保证缓存的对象已含覆盖。
+    DB 还没初始化时（首次 import）静默跳过，用 YAML 原值。
+
+    注意：get_session_local() -> get_engine() -> _db_path() -> get_settings()
+    会形成递归。用 _applying_overrides 标志阻断：递归调用直接返回当前 settings
+    （此时 DB 路径只需 work_dir，无覆盖也无妨）。
+    """
+    global _applying_overrides
+    if _applying_overrides:
+        return settings  # 递归调用（_db_path 触发），直接返回 YAML 原值
+    _applying_overrides = True
+    try:
+        from .database import get_session_local
+        from .models.setting import Setting
+        import json
+        db = get_session_local()()
+        try:
+            rows = db.query(Setting).all()
+            overrides = {r.key: r.value for r in rows}
+        finally:
+            db.close()
+        for key, type_ in _OVERIDEABLE_FIELDS.items():
+            if key not in overrides:
+                continue
+            try:
+                val = json.loads(overrides[key])
+                val = type_(val)
+            except (json.JSONDecodeError, ValueError, TypeError):
+                continue
+            _set_nested(settings, key, val)
+    except Exception:
+        # DB 未就绪（首次 import 时 database.py 可能还在初始化）-> 跳过，用 YAML 原值
+        pass
+    finally:
+        _applying_overrides = False
+    return settings
+
+
+def _set_nested(settings: Settings, key: str, val) -> None:
+    """按点分路径设置嵌套属性，如 'asr.batch_size' -> settings.asr.batch_size"""
+    parts = key.split(".")
+    obj = settings
+    for p in parts[:-1]:
+        obj = getattr(obj, p)
+    setattr(obj, parts[-1], val)
+
+
 @lru_cache(maxsize=1)
 def get_settings() -> Settings:
+    """读取 config.yaml + 应用 DB 覆盖，返回完整 Settings。
+
+    结果被 lru_cache 缓存。修改设置后调 reload_settings() 清缓存，
+    下次调用返回含新值的 Settings。
+    """
     path = Path(os.getenv("CONFIG_PATH", str(DEFAULT_CONFIG_PATH)))
-    return Settings.model_validate(_load_yaml(path))
+    settings = Settings.model_validate(_load_yaml(path))
+    return _apply_overrides(settings)
 
 
 def reload_settings() -> Settings:
-    """清缓存并重新读取，供脚本与测试使用。"""
+    """清缓存并重新读取（含 DB 覆盖），供设置页保存后调用。"""
     get_settings.cache_clear()
     return get_settings()
+
+
+def save_setting(key: str, value) -> None:
+    """保存单个配置项覆盖到 DB + 清 lru_cache。
+
+    Args:
+        key: 点分路径，必须在 _OVERIDEABLE_FIELDS 中
+        value: 要保存的值（自动 JSON 编码）
+    """
+    import json
+    if key not in _OVERIDEABLE_FIELDS:
+        raise ValueError(f"不允许修改的配置项：{key}")
+    from .database import get_session_local
+    from .models.setting import Setting
+    type_ = _OVERIDEABLE_FIELDS[key]
+    encoded = json.dumps(type_(value))
+    db = get_session_local()()
+    try:
+        row = db.get(Setting, key)
+        if row is None:
+            row = Setting(key=key, value=encoded)
+            db.add(row)
+        else:
+            row.value = encoded
+        db.commit()
+    finally:
+        db.close()
+    # 清缓存，让后续 get_settings() 读到新值
+    get_settings.cache_clear()
diff --git a/app/controllers/__init__.py b/app/controllers/__init__.py
index 884ebcc..bd66627 100644
--- a/app/controllers/__init__.py
+++ b/app/controllers/__init__.py
@@ -1,7 +1,8 @@
 """路由聚合：导出各 controller 的 router，供 main.py include。"""
 
 from .log_router import router as log_router
+from .settings_router import router as settings_router
 from .task_router import router as task_router
 from .upload_router import router as upload_router
 
-__all__ = ["log_router", "task_router", "upload_router"]
+__all__ = ["log_router", "settings_router", "task_router", "upload_router"]
diff --git a/app/controllers/settings_router.py b/app/controllers/settings_router.py
new file mode 100644
index 0000000..b9d6eef
--- /dev/null
+++ b/app/controllers/settings_router.py
@@ -0,0 +1,92 @@
+"""设置路由：查询/修改运行时可调参数。
+
+config.yaml 是只读挂载，改它需重启容器。本路由把部分参数（batch_size 等）
+存到 DB 的 setting 表，通过 config.save_setting() + reload_settings() 实现
+运行时热更新：保存后清 lru_cache，后续任务读到新值。
+
+当前可调项与 config._OVERIDEABLE_FIELDS 对齐。
+"""
+
+from __future__ import annotations
+
+import logging
+
+from fastapi import APIRouter
+from pydantic import BaseModel, Field
+
+from ..config import _OVERIDEABLE_FIELDS, get_settings, save_setting
+
+logger = logging.getLogger("audio2text.settings")
+router = APIRouter(prefix="/api/settings", tags=["settings"])
+
+
+# ---------------- 响应 / 请求 DTO ----------------
+
+class SettingsResponse(BaseModel):
+    """当前生效的设置值（YAML 基础 + DB 覆盖后的合并值）。"""
+    asr_batch_size: int
+    asr_beam_size: int
+    translation_batch_size: int
+    translation_sort_by_length: bool
+    # 不可改但展示的只读信息
+    asr_model: str
+    asr_device: str
+    asr_compute_type: str
+    translation_model: str
+    translation_device: str
+
+
+class SettingsUpdate(BaseModel):
+    """设置更新请求：只传要改的字段，未传的保持不变。"""
+    asr_batch_size: int | None = Field(default=None, ge=1, le=128)
+    asr_beam_size: int | None = Field(default=None, ge=1, le=10)
+    translation_batch_size: int | None = Field(default=None, ge=1, le=256)
+    translation_sort_by_length: bool | None = None
+
+
+# ---------------- 字段映射：DTO 字段名 -> config 点分路径 ----------------
+
+_FIELD_MAP: dict[str, str] = {
+    "asr_batch_size": "asr.batch_size",
+    "asr_beam_size": "asr.beam_size",
+    "translation_batch_size": "translation.batch_size",
+    "translation_sort_by_length": "translation.sort_by_length",
+}
+
+
+# ---------------- 接口 ----------------
+
+@router.get("", summary="查询当前生效的设置")
+def get_current_settings() -> SettingsResponse:
+    """返回当前生效的设置（YAML 基础 + DB 覆盖合并后的值）。"""
+    s = get_settings()
+    return SettingsResponse(
+        asr_batch_size=s.asr.batch_size,
+        asr_beam_size=s.asr.beam_size,
+        translation_batch_size=s.translation.batch_size,
+        translation_sort_by_length=s.translation.sort_by_length,
+        asr_model=s.asr.model,
+        asr_device=s.asr.device,
+        asr_compute_type=s.asr.compute_type,
+        translation_model=s.translation.model,
+        translation_device=s.translation.device,
+    )
+
+
+@router.put("", summary="更新设置（保存后对后续任务生效）")
+def update_settings(req: SettingsUpdate) -> dict:
+    """保存修改的设置项到 DB，清配置缓存。
+
+    只处理请求中非 None 的字段。保存后立即生效（后续任务读到新值），
+    已在跑的任务不受影响（任务在各阶段开始时读配置）。
+    """
+    changed: dict = {}
+    for field, path in _FIELD_MAP.items():
+        val = getattr(req, field)
+        if val is not None:
+            save_setting(path, val)
+            changed[field] = val
+            logger.info("设置已更新：%s = %s（对后续任务生效）", path, val)
+    if not changed:
+        return {"status": "no_change", "changed": {}}
+    return {"status": "saved", "changed": changed}
diff --git a/app/controllers/task_router.py b/app/controllers/task_router.py
index 369f649..cd34727 100644
--- a/app/controllers/task_router.py
+++ b/app/controllers/task_router.py
@@ -1,7 +1,9 @@
-"""任务路由：列表 / 状态 / 下载字幕。"""
+"""任务路由：列表 / 状态 / 下载字幕 / 删除。"""
 
 from __future__ import annotations
 
+import logging
+import shutil
 from datetime import datetime, timezone
 from pathlib import Path
 
@@ -11,10 +13,11 @@ from sqlalchemy.orm import Session
 
 from ..config import get_settings
 from ..database import get_db
-from ..models.task import Task, STATUS_UPLOADING
+from ..models.task import Task, STATUS_UPLOADING, STATUS_DONE, STATUS_FAILED
 from ..models.upload_session import UploadSession
 from ..schemas.task import TaskListResponse, TaskResponse
 
+logger = logging.getLogger("audio2text.tasks")
 router = APIRouter(prefix="/api/tasks", tags=["task"])
 
 
@@ -129,3 +132,47 @@ def download_subtitle(
         media_type="application/x-subrip",
         filename=download_name,
     )
+
+
+@router.delete("/{task_id}", summary="删除任务（仅允许已完成/失败）")
+def delete_task(task_id: int, db: Session = Depends(get_db)) -> dict:
+    """删除任务及其产物（字幕 / 中间音频 / 保留的原始视频）+ DB 记录。
+
+    仅允许删除已完成（done）或失败（failed）的任务，进行中的任务不可删。
+    """
+    task = db.get(Task, task_id)
+    if task is None:
+        raise HTTPException(404, f"任务不存在：{task_id}")
+    if task.status not in (STATUS_DONE, STATUS_FAILED):
+        raise HTTPException(409, f"任务进行中，无法删除（当前状态：{task.status}）")
+
+    s = get_settings()
+    deleted: list[str] = []
+
+    # 删字幕输出目录
+    out_dir = s.output_dir() / f"task_{task.id}"
+    if out_dir.is_dir():
+        shutil.rmtree(out_dir, ignore_errors=True)
+        deleted.append("outputs")
+
+    # 删中间音频
+    if task.wav_path:
+        wav = Path(task.wav_path)
+        if wav.is_file():
+            wav.unlink(missing_ok=True)
+            deleted.append("audio")
+
+    # 删保留的原始视频
+    if task.source_path:
+        src = s.upload_dir() / task.source_path
+        if src.is_file():
+            src.unlink(missing_ok=True)
+            deleted.append("video")
+
+    # 删 DB 记录（先删关联的 UploadSession，再删 Task）
+    db.query(UploadSession).filter(UploadSession.task_id == task.id).delete()
+    db.delete(task)
+    db.commit()
+
+    logger.info("删除任务 %d（%s）：%s", task_id, task.filename, ", ".join(deleted) or "无产物")
+    return {"status": "deleted", "task_id": task_id, "cleaned": deleted}
diff --git a/app/database.py b/app/database.py
index 4dae34e..e9af836 100644
--- a/app/database.py
+++ b/app/database.py
@@ -58,6 +58,7 @@ def init_db_schema() -> None:
     """
     from .models.task import Task  # noqa: F401
     from .models.upload_session import UploadSession  # noqa: F401
+    from .models.setting import Setting  # noqa: F401
 
     engine = get_engine()
     Base.metadata.create_all(engine)
diff --git a/app/main.py b/app/main.py
index 98eee80..49d1778 100644
--- a/app/main.py
+++ b/app/main.py
@@ -19,21 +19,21 @@ import logging
 import threading
 from contextlib import asynccontextmanager
 
-from fastapi import Depends, FastAPI
+from fastapi import FastAPI
 from fastapi.openapi.docs import get_redoc_html, get_swagger_ui_html
 from fastapi.responses import HTMLResponse, JSONResponse
 from sqlalchemy.orm import Session
 
 from .config import get_settings
-from .controllers import log_router, task_router, upload_router
+from .controllers import log_router, settings_router, task_router, upload_router
 from .database import get_db, init_db_schema
-from .security import require_docs_auth
 from .services.cache_cleaner import purge_expired_cache, run_forever as run_cache_cleaner
 from .services.log_buffer import init_log_buffer
 from .services.reaper import reap_stale_sessions
 from .views.history_html import render as render_history_html
 from .views.home_html import render as render_home_html
 from .views.logs_html import render as render_logs_html
+from .views.settings_html import render as render_settings_html
 
 # 日志分层：
 # - audio2text logger 始终设 DEBUG，确保所有记录（含子步骤）都能产生。
@@ -126,20 +126,21 @@ def create_app() -> FastAPI:
     app.include_router(upload_router)
     app.include_router(task_router)
     app.include_router(log_router)
+    app.include_router(settings_router)
 
-    # 受 Basic Auth 保护的文档接口
+    # 文档接口（无认证，直接公开）
     @app.get("/openapi.json")
-    def protected_openapi(_: str = Depends(require_docs_auth)) -> JSONResponse:
+    def openapi_endpoint() -> JSONResponse:
         return JSONResponse(app.openapi())
 
     @app.get("/docs")
-    def protected_docs(_: str = Depends(require_docs_auth)):
+    def docs_endpoint():
         return get_swagger_ui_html(
             openapi_url="/openapi.json", title="audio2text docs", swagger_favicon_url=""
         )
 
     @app.get("/redoc")
-    def protected_redoc(_: str = Depends(require_docs_auth)):
+    def redoc_endpoint():
         return get_redoc_html(
             openapi_url="/openapi.json", title="audio2text docs", redoc_favicon_url=""
         )
@@ -187,6 +188,10 @@ def create_app() -> FastAPI:
     def logs_page() -> HTMLResponse:
         return HTMLResponse(render_logs_html())
 
+    @app.get("/settings", response_class=HTMLResponse)
+    def settings_page() -> HTMLResponse:
+        return HTMLResponse(render_settings_html())
+
     return app
 
 
diff --git a/app/models/setting.py b/app/models/setting.py
new file mode 100644
index 0000000..2e0646f
--- /dev/null
+++ b/app/models/setting.py
@@ -0,0 +1,36 @@
+"""运行时设置覆盖（键值存储）。
+
+config.yaml 是只读挂载（镜像内不含配置），改完需重启容器才生效。
+本表持久化用户在「设置页」修改的参数，进程重启后自动加载，
+无需改 config.yaml 或重建镜像。
+
+当前支持的键见 _ALLOWED_KEYS（settings_router 维护），值为 JSON 字符串。
+"""
+
+from __future__ import annotations
+
+from datetime import datetime, timezone
+
+from sqlalchemy import String, DateTime, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from ..database import Base
+
+
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+class Setting(Base):
+    """单个配置项的覆盖值（key = 'asr.batch_size' 之类的点分路径）。"""
+
+    __tablename__ = "setting"
+
+    key: Mapped[str] = mapped_column(String(128), primary_key=True)
+    value: Mapped[str] = mapped_column(Text)  # JSON 编码的值
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, default=_now, onupdate=_now,
+    )
+
+    def __repr__(self) -> str:
+        return f"Setting(key={self.key!r}, value={self.value!r})"
diff --git a/app/views/_shared.py b/app/views/_shared.py
index e6f1109..5cf0eb0 100644
--- a/app/views/_shared.py
+++ b/app/views/_shared.py
@@ -19,6 +19,7 @@ _NAV_ITEMS = [
     ("/", "主页", "home"),
     ("/history", "历史", "history"),
     ("/logs", "日志", "logs"),
+    ("/settings", "设置", "settings"),
 ]
 
 
diff --git a/app/views/history_html.py b/app/views/history_html.py
index 1036692..2851e35 100644
--- a/app/views/history_html.py
+++ b/app/views/history_html.py
@@ -82,7 +82,12 @@ function renderTable(tasks) {{
     }} else if (task.status === "failed") {{
       action = `<span class="err-tip" title="${{escapeHtml(task.error || "")}}">查看错误</span>`;
     }} else {{
-      action = `<span class="muted">—</span>`;
+      action = `<span class="muted">-</span>`;
+    }}
+    // done/failed 且非上传中：加删除按钮
+    const canDelete = (task.status === "done" || task.status === "failed") && !task.is_upload;
+    if (canDelete) {{
+      action += ` <button class="btn-sm" onclick="deleteTask(${{task.id}})">删除</button>`;
     }}
 
     let progress;
@@ -117,6 +122,17 @@ function renderPagination() {{
   paginationEl.innerHTML = html;
 }}
 
+async function deleteTask(taskId) {{
+  if (!confirm("确认删除任务 #" + taskId + "？字幕和中间文件将被清除。")) return;
+  try {{
+    const r = await fetch("/api/tasks/" + taskId, {{ method: "DELETE" }});
+    if (!r.ok) {{ alert("删除失败：" + await r.text()); return; }}
+    load(currentOffset);
+  }} catch (e) {{
+    alert("删除失败：" + e);
+  }}
+}}
+
 load(0);
 """
 
diff --git a/app/views/home_html.py b/app/views/home_html.py
index c743354..f4f1afb 100644
--- a/app/views/home_html.py
+++ b/app/views/home_html.py
@@ -77,6 +77,12 @@ function renderTaskInner(task) {{
   try {{ created = fmtDateTime24(new Date(task.created_at + "Z")); }}
   catch (e) {{ created = task.created_at; }}
 
+  // 删除按钮：仅 done/failed 且非上传中任务显示
+  const canDelete = (task.status === "done" || task.status === "failed") && !task.is_upload;
+  const delBtn = canDelete
+    ? `<button class="btn-sm del-btn" onclick="deleteTask(${{task.id}}, this)">删除</button>`
+    : "";
+
   let body;
   if (task.status === "done") {{
     body = `<div class="task-meta"><b>完成</b> · ${{downloadLinks(task.id)}}</div>`;
@@ -91,11 +97,30 @@ function renderTaskInner(task) {{
     <div class="task-head">
       <span class="fname">${{task.is_upload ? "" : "#" + task.id + " "}}${{escapeHtml(task.filename)}}</span>
       <span class="fstate ${{stateClass}}">${{label}}</span>
+      ${{delBtn}}
     </div>
     ${{body}}
     <div class="task-time">${{created}}</div>`;
 }}
 
+async function deleteTask(taskId, btn) {{
+  if (!confirm("确认删除任务 #" + taskId + "？字幕和中间文件将被清除。")) return;
+  btn.disabled = true;
+  try {{
+    const r = await fetch("/api/tasks/" + taskId, {{ method: "DELETE" }});
+    if (!r.ok) {{
+      const err = await r.text();
+      alert("删除失败：" + err);
+      btn.disabled = false;
+      return;
+    }}
+    refreshList();
+  }} catch (e) {{
+    alert("删除失败：" + e);
+    btn.disabled = false;
+  }}
+}}
+
 async function pollTask(task) {{
   // 上传会话：轮询 upload status 接口；Task：轮询 task 接口
   const isUpload = task.is_upload === true && task.upload_id;
diff --git a/app/views/settings_html.py b/app/views/settings_html.py
new file mode 100644
index 0000000..fd749ae
--- /dev/null
+++ b/app/views/settings_html.py
@@ -0,0 +1,182 @@
+"""设置页：调整批处理大小等运行时参数，保存后对后续任务生效。
+
+页面结构：表单展示当前生效值（GET /api/settings），用户修改后点保存（PUT /api/settings），
+保存到 DB 并清配置缓存，后续任务读到新值。已在跑的任务不受影响。
+"""
+
+from __future__ import annotations
+
+from ._shared import render_page
+
+
+# 页面专属 CSS
+_PAGE_CSS = """
+.field-group { margin: 1em 0; }
+.field-group h2 { margin-bottom: 0.3em; }
+.field-row {
+  display: flex; align-items: center; gap: 0.8em;
+  padding: 0.6em 0; border-bottom: 1px solid var(--border);
+}
+.field-row:last-child { border-bottom: none; }
+.field-label { font-weight: 600; min-width: 200px; }
+.field-desc { color: var(--muted); font-size: 0.82em; flex: 1; }
+.field-input { width: 80px; }
+.field-input[type="number"] {
+  padding: 0.3em 0.5em; border: 1px solid var(--border); border-radius: 4px;
+  background: var(--card-bg); color: var(--fg); font-size: 0.92em; text-align: center;
+}
+.field-input[type="checkbox"] { width: auto; transform: scale(1.3); }
+.readonly-info {
+  display: grid; grid-template-columns: 1fr 1fr; gap: 0.5em 1.5em;
+  margin: 1em 0; padding: 0.8em 1em; background: var(--card-bg);
+  border: 1px solid var(--border); border-radius: 8px; font-size: 0.88em;
+}
+.readonly-info .kv { display: flex; gap: 0.5em; }
+.readonly-info .k { color: var(--muted); min-width: 90px; }
+.save-bar { display: flex; align-items: center; gap: 1em; margin-top: 1.2em; }
+.save-msg { font-size: 0.88em; }
+.save-msg.ok { color: var(--success); }
+.save-msg.err { color: var(--error); }
+"""
+
+# 页面专属 JS（f-string，花括号需 {{ }}）
+_PAGE_JS = """
+let originalValues = {};
+
+async function loadSettings() {
+  try {
+    const r = await fetch("/api/settings");
+    if (!r.ok) throw new Error("HTTP " + r.status);
+    const s = await r.json();
+    document.getElementById("asr_batch_size").value = s.asr_batch_size;
+    document.getElementById("asr_beam_size").value = s.asr_beam_size;
+    document.getElementById("translation_batch_size").value = s.translation_batch_size;
+    document.getElementById("translation_sort_by_length").checked = s.translation_sort_by_length;
+    // 只读信息
+    document.getElementById("ro_asr_model").textContent = s.asr_model;
+    document.getElementById("ro_asr_device").textContent = s.asr_device;
+    document.getElementById("ro_asr_compute_type").textContent = s.asr_compute_type;
+    document.getElementById("ro_translation_model").textContent = s.translation_model;
+    document.getElementById("ro_translation_device").textContent = s.translation_device;
+    // 记录原始值用于检测是否有变更
+    originalValues = {
+      asr_batch_size: s.asr_batch_size,
+      asr_beam_size: s.asr_beam_size,
+      translation_batch_size: s.translation_batch_size,
+      translation_sort_by_length: s.translation_sort_by_length,
+    };
+    setMsg("", "");
+  } catch (e) {
+    setMsg("加载失败：" + escapeHtml(String(e.message || e)), "err");
+  }
+}
+
+function collectChanges() {
+  const body = {};
+  const cur = {
+    asr_batch_size: parseInt(document.getElementById("asr_batch_size").value, 10),
+    asr_beam_size: parseInt(document.getElementById("asr_beam_size").value, 10),
+    translation_batch_size: parseInt(document.getElementById("translation_batch_size").value, 10),
+    translation_sort_by_length: document.getElementById("translation_sort_by_length").checked,
+  };
+  for (const [k, v] of Object.entries(cur)) {
+    if (v !== originalValues[k]) body[k] = v;
+  }
+  return body;
+}
+
+async function saveSettings() {
+  const changes = collectChanges();
+  if (Object.keys(changes).length === 0) {
+    setMsg("没有变更", "");
+    return;
+  }
+  const btn = document.getElementById("save-btn");
+  btn.disabled = true;
+  btn.textContent = "保存中...";
+  setMsg("正在保存...", "");
+  try {
+    const r = await fetch("/api/settings", {
+      method: "PUT",
+      headers: {"Content-Type": "application/json"},
+      body: JSON.stringify(changes),
+    });
+    if (!r.ok) throw new Error("HTTP " + r.status + " " + await r.text());
+    const resp = await r.json();
+    setMsg("已保存：" + Object.keys(resp.changed).join(", ") + "（对后续任务生效）", "ok");
+    await loadSettings();  // 重新加载确认
+  } catch (e) {
+    setMsg("保存失败：" + escapeHtml(String(e.message || e)), "err");
+  } finally {
+    btn.disabled = false;
+    btn.textContent = "保存设置";
+  }
+}
+
+function setMsg(text, cls) {
+  const el = document.getElementById("save-msg");
+  el.textContent = text;
+  el.className = "save-msg" + (cls ? " " + cls : "");
+}
+
+loadSettings();
+"""
+
+_BODY = """
+<h1>设置</h1>
+<p class="sub">调整批处理大小等运行时参数。保存后对<strong>后续任务</strong>生效，已在运行的任务不受影响。</p>
+
+<div class="field-group">
+  <h2>语音识别（ASR）</h2>
+  <div class="field-row">
+    <span class="field-label">batch_size</span>
+    <input type="number" id="asr_batch_size" class="field-input" min="1" max="128" value="16">
+    <span class="field-desc">批量解码的音频块数。增大可拉长单次 GPU 解码、提升利用率，但显存占用增加</span>
+  </div>
+  <div class="field-row">
+    <span class="field-label">beam_size</span>
+    <input type="number" id="asr_beam_size" class="field-input" min="1" max="10" value="5">
+    <span class="field-desc">beam search 宽度。GPU turbo 建议 2（加速、质量损失小），CPU 建议 5</span>
+  </div>
+</div>
+
+<div class="field-group">
+  <h2>翻译（NLLB）</h2>
+  <div class="field-row">
+    <span class="field-label">batch_size</span>
+    <input type="number" id="translation_batch_size" class="field-input" min="1" max="256" value="32">
+    <span class="field-desc">翻译批量大小。显存独占时可用大 batch 填充 GPU</span>
+  </div>
+  <div class="field-row">
+    <span class="field-label">sort_by_length</span>
+    <input type="checkbox" id="translation_sort_by_length" class="field-input">
+    <span class="field-desc">按句子长度排序后分批，减少批内 padding 浪费（GPU 收益大）</span>
+  </div>
+</div>
+
+<div class="save-bar">
+  <button class="btn" id="save-btn" onclick="saveSettings()">保存设置</button>
+  <span id="save-msg" class="save-msg"></span>
+</div>
+
+<div class="field-group">
+  <h2>设备信息（只读）</h2>
+  <div class="readonly-info">
+    <div class="kv"><span class="k">ASR 模型</span><span id="ro_asr_model"></span></div>
+    <div class="kv"><span class="k">ASR 设备</span><span id="ro_asr_device"></span></div>
+    <div class="kv"><span class="k">计算精度</span><span id="ro_asr_compute_type"></span></div>
+    <div class="kv"><span class="k">翻译模型</span><span id="ro_translation_model"></span></div>
+    <div class="kv"><span class="k">翻译设备</span><span id="ro_translation_device"></span></div>
+  </div>
+</div>
+"""
+
+
+def render() -> str:
+    return render_page(
+        title="audio2text - 设置",
+        nav_active="settings",
+        body=_BODY,
+        page_js=_PAGE_JS,
+        page_css=_PAGE_CSS,
+    )