diff --git a/apps/desktop/src/renderer/src/components/SettingsModal.tsx b/apps/desktop/src/renderer/src/components/SettingsModal.tsx
index 5b6d428..dc9a421 100644
--- a/apps/desktop/src/renderer/src/components/SettingsModal.tsx
+++ b/apps/desktop/src/renderer/src/components/SettingsModal.tsx
@@ -2,6 +2,7 @@ import { memo, useEffect, useMemo, useRef, useState, useTransition, type ReactNo
 import type { JSX, RefObject } from 'react'
 import { useVirtualizer } from '@tanstack/react-virtual'
 import {
+  LuArrowLeft,
   LuCheck,
   LuCpu,
   LuFolderOpen,
@@ -878,8 +879,9 @@ function PluginSettingsForm({
     }
   }
 
+  // 注意不要写 w-full：string/number 控件要定宽（w-56/w-28）跟 label 同行，w-full 会把 label 挤成竖排
   const inputCls =
-    'w-full rounded-control border border-line-strong bg-surface px-2.5 py-1.5 text-[12px] text-ink outline-none placeholder:text-ink-3 focus:border-ink-3'
+    'rounded-control border border-line-strong bg-surface px-2.5 py-1.5 text-[12px] text-ink outline-none placeholder:text-ink-3 focus:border-ink-3'
 
   return (
     <div className="space-y-1">
@@ -953,7 +955,7 @@ function PluginSettingsForm({
                   value={typeof value === 'string' ? value : ''}
                   placeholder={item.placeholder}
                   onChange={(e) => onChange(item.key, e.target.value)}
-                  className={`${inputCls} mt-2 resize-y font-mono`}
+                  className={`${inputCls} mt-2 w-full resize-y font-mono`}
                 />
               </div>
             )
@@ -1389,6 +1391,16 @@ export function SettingsModal({
         {/* 右侧：内容页 */}
         <div className="flex min-w-0 flex-1 flex-col">
           <div className="flex items-start gap-3 px-6 pb-3 pt-5">
+            {tab.startsWith('plugin:') && (
+              <button
+                type="button"
+                onClick={() => setTab('plugins')}
+                className="mt-0.5 flex shrink-0 items-center gap-1 rounded-control border border-line-strong px-2 py-1 text-[11.5px] text-ink transition-colors hover:bg-hover"
+              >
+                <LuArrowLeft size={13} />
+                返回
+              </button>
+            )}
             <div className="min-w-0 flex-1">
               <div className="text-[16px] font-semibold text-ink">{meta.title}</div>
               {meta.desc && <div className="mt-0.5 text-[12px] leading-5 text-ink-3">{meta.desc}</div>}