refactor: 总超时从滑块改为数字输入框(120-3600秒)，移除未用的Slider导入

src/components/settings/SettingsModal.tsx

@@ -3,7 +3,7 @@
  */
 
 import { useState, useEffect, useCallback } from 'react';
-import { Dialog, DialogContent, DialogTitle, Button, TextField, Select, MenuItem, Tabs, Tab, Slider, Checkbox, Box, Typography, Stack, Divider, FormControlLabel, InputLabel, FormControl, IconButton, Chip } from '@mui/material';
+import { Dialog, DialogContent, DialogTitle, Button, TextField, Select, MenuItem, Tabs, Tab, Checkbox, Box, Typography, Stack, Divider, FormControlLabel, InputLabel, FormControl, IconButton, Chip } from '@mui/material';
 import { X, Settings, Bot, Wrench, Server, Palette, FileText, Eye, EyeOff, FolderOpen } from 'lucide-react';
 import { useUIStore, type ThemeMode } from '@renderer/stores/ui-store';
 import { useAgentStore } from '@renderer/stores/agent-store';
@@ -156,10 +156,17 @@ function AgentSettings() {
           ))}
         </Select>
       </FormControl>
-      <Box>
-        <Stack direction="row" justifyContent="space-between"><Typography variant="caption" sx={{ color: 'text.secondary' }}>总超时 (秒)</Typography><Typography variant="caption" sx={{ fontFamily: 'monospace' }}>{timeout / 1000}s</Typography></Stack>
-        <Slider value={timeout / 1000} onChange={(_, v) => setTimeout_((v as number) * 1000)} min={60} max={1800} step={60} size="small" />
-      </Box>
+      <TextField
+        size="small"
+        label="总超时（秒）"
+        type="number"
+        value={timeout / 1000}
+        onChange={(e) => {
+          const v = Number(e.target.value);
+          if (v >= 120 && v <= 3600) setTimeout_(v * 1000);
+        }}
+        slotProps={{ htmlInput: { min: 120, max: 3600, step: 30 } }}
+      />
       <FormControlLabel control={<Checkbox checked={thinking} onChange={(e) => setThinking(e.target.checked)} size="small" />} label={<Typography variant="body2">启用思考模式</Typography>} />
       {thinking && (
         <FormControl size="small"><InputLabel>思考强度</InputLabel>