diff --git a/dashboard/src/lib/theme/pipeline.ts b/dashboard/src/lib/theme/pipeline.ts
index 77bc0410..89633881 100644
--- a/dashboard/src/lib/theme/pipeline.ts
+++ b/dashboard/src/lib/theme/pipeline.ts
@@ -43,7 +43,7 @@ const buildTokens = (config: UserThemeConfig, isDark: boolean): ThemeTokens => {
     mergedTokens = mergeTokens(mergedTokens, { color: paletteTokens })
   }
 
-  if (config.selectedPreset) {
+  if (config.selectedPreset && config.selectedPreset !== 'light' && config.selectedPreset !== 'dark') {
     const preset = getPresetById(config.selectedPreset)
     if (preset?.tokens) {
       mergedTokens = mergeTokens(mergedTokens, preset.tokens)
diff --git a/src/webui/routers/config.py b/src/webui/routers/config.py
index b8394dcf..a5004a73 100644
--- a/src/webui/routers/config.py
+++ b/src/webui/routers/config.py
@@ -9,7 +9,7 @@ from typing import Any, Annotated, Optional
 
 from src.common.logger import get_logger
 from src.webui.core import verify_auth_token_from_cookie_or_header
-from src.common.toml_utils import save_toml_with_format, _update_toml_doc
+from src.webui.utils.toml_utils import save_toml_with_format, _update_toml_doc
 from src.config.config import Config, ModelConfig, CONFIG_DIR, PROJECT_ROOT
 from src.config.official_configs import (
     BotConfig,
diff --git a/src/webui/routers/plugin.py b/src/webui/routers/plugin.py
index 32102235..3c7d5ae1 100644
--- a/src/webui/routers/plugin.py
+++ b/src/webui/routers/plugin.py
@@ -4,7 +4,7 @@ from typing import Optional, List, Dict, Any, get_origin
 from pathlib import Path
 import json
 from src.common.logger import get_logger
-from src.common.toml_utils import save_toml_with_format
+from src.webui.utils.toml_utils import save_toml_with_format
 from src.config.config import MMC_VERSION
 from src.core.config_types import ConfigField
 from src.webui.services.git_mirror_service import get_git_mirror_service, set_update_progress_callback
diff --git a/src/webui/utils/toml_utils.py b/src/webui/utils/toml_utils.py
new file mode 100644
index 00000000..7543979a
--- /dev/null
+++ b/src/webui/utils/toml_utils.py
@@ -0,0 +1,104 @@
+"""
+TOML 工具函数
+
+提供 TOML 文件的格式化保存功能，确保数组等元素以美观的多行格式输出。
+"""
+
+from typing import Any
+import re
+import tomlkit
+from tomlkit.items import AoT, Array, Table
+
+
+def _format_toml_value(obj: Any, threshold: int, depth: int = 0) -> Any:
+    """递归格式化 TOML 值，将数组转换为多行格式"""
+    # 处理 AoT (Array of Tables) - 保持原样，递归处理内部
+    if isinstance(obj, AoT):
+        for item in obj:
+            _format_toml_value(item, threshold, depth)
+        return obj
+
+    # 处理字典类型 (dict 或 Table)
+    if isinstance(obj, (dict, Table)):
+        for k, v in obj.items():
+            obj[k] = _format_toml_value(v, threshold, depth)
+        return obj
+
+    # 处理列表类型 (list 或 Array)
+    if isinstance(obj, (list, Array)):
+        if isinstance(obj, list) and not isinstance(obj, Array) and obj and isinstance(obj[0], (dict, Table)):
+            for i, item in enumerate(obj):
+                obj[i] = _format_toml_value(item, threshold, depth)
+            return obj
+
+        should_multiline = depth == 0 and len(obj) > threshold
+
+        if isinstance(obj, Array):
+            obj.multiline(should_multiline)
+            for i, item in enumerate(obj):
+                obj[i] = _format_toml_value(item, threshold, depth + 1)
+            return obj
+
+        arr = tomlkit.array()
+        arr.multiline(should_multiline)
+
+        for item in obj:
+            arr.append(_format_toml_value(item, threshold, depth + 1))
+        return arr
+
+    return obj
+
+
+def _update_toml_doc(target: Any, source: Any) -> None:
+    """
+    递归合并字典，将 source 的值更新到 target 中，保留 target 的注释和格式。
+    """
+    if isinstance(source, list) or not isinstance(source, dict) or not isinstance(target, dict):
+        return
+
+    for key, value in source.items():
+        if key == "version":
+            continue
+        if key in target:
+            target_value = target[key]
+            if isinstance(value, dict) and isinstance(target_value, dict):
+                _update_toml_doc(target_value, value)
+            else:
+                try:
+                    target[key] = tomlkit.item(value)
+                except (TypeError, ValueError):
+                    target[key] = value
+        else:
+            try:
+                target[key] = tomlkit.item(value)
+            except (TypeError, ValueError):
+                target[key] = value
+
+
+def save_toml_with_format(
+    data: Any, file_path: str, multiline_threshold: int = 1, preserve_comments: bool = True
+) -> None:
+    """
+    格式化 TOML 数据并保存到文件。
+
+    Args:
+        data: 要保存的数据（dict 或 tomlkit 文档）
+        file_path: 保存路径
+        multiline_threshold: 数组多行格式化阈值，-1 表示不格式化
+        preserve_comments: 是否保留原文件的注释和格式
+    """
+    import os
+
+    from tomlkit import TOMLDocument
+
+    if preserve_comments and os.path.exists(file_path) and not isinstance(data, TOMLDocument):
+        with open(file_path, "r", encoding="utf-8") as f:
+            doc = tomlkit.load(f)
+        _update_toml_doc(doc, data)
+        data = doc
+
+    formatted = _format_toml_value(data, multiline_threshold) if multiline_threshold >= 0 else data
+    output = tomlkit.dumps(formatted)
+    output = re.sub(r"\n{3,}", "\n\n", output)
+    with open(file_path, "w", encoding="utf-8") as f:
+        f.write(output)