添加会话数量显示与清除功能

添加会话清除功能，增强安全性，避免账号被盗等情况泄露源代码
账号列表点击测试后显示账号的会话数量
设置页添加自动清除开关，每次调用后清除被调用账号的所有会话

webui/src/features/settings/AutoDeleteSection.jsx

@@ -0,0 +1,39 @@
+import { Trash2 } from 'lucide-react'
+
+export default function AutoDeleteSection({ t, form, setForm }) {
+    return (
+        <div className="bg-card border border-border rounded-xl p-5 space-y-4">
+            <div className="flex items-center gap-2">
+                <Trash2 className="w-4 h-4 text-muted-foreground" />
+                <h3 className="font-semibold">{t('settings.autoDeleteTitle')}</h3>
+            </div>
+            <p className="text-sm text-muted-foreground">{t('settings.autoDeleteDesc')}</p>
+            <div className="flex items-center justify-between">
+                <label className="text-sm font-medium">{t('settings.autoDeleteSessions')}</label>
+                <button
+                    type="button"
+                    role="switch"
+                    aria-checked={form.auto_delete?.sessions || false}
+                    onClick={() => setForm((prev) => ({
+                        ...prev,
+                        auto_delete: { ...prev.auto_delete, sessions: !prev.auto_delete?.sessions },
+                    }))}
+                    className={`relative inline-flex h-6 w-11 items-center rounded-full transition-colors ${
+                        form.auto_delete?.sessions ? 'bg-primary' : 'bg-muted'
+                    }`}
+                >
+                    <span
+                        className={`inline-block h-4 w-4 transform rounded-full bg-white transition-transform ${
+                            form.auto_delete?.sessions ? 'translate-x-6' : 'translate-x-1'
+                        }`}
+                    />
+                </button>
+            </div>
+            {form.auto_delete?.sessions && (
+                <p className="text-xs text-amber-500 flex items-center gap-1">
+                    {t('settings.autoDeleteWarning')}
+                </p>
+            )}
+        </div>
+    )
+}

webui/src/features/settings/SettingsContainer.jsx

@@ -5,6 +5,7 @@ import { useSettingsForm } from './useSettingsForm'
 import SecuritySection from './SecuritySection'
 import RuntimeSection from './RuntimeSection'
 import BehaviorSection from './BehaviorSection'
+import AutoDeleteSection from './AutoDeleteSection'
 import ModelSection from './ModelSection'
 import BackupSection from './BackupSection'
 
@@ -91,6 +92,8 @@ export default function SettingsContainer({ onRefresh, onMessage, authFetch, onF
 
             <BehaviorSection t={t} form={form} setForm={setForm} />
 
+            <AutoDeleteSection t={t} form={form} setForm={setForm} />
+
             <ModelSection t={t} form={form} setForm={setForm} />
 
             <BackupSection

webui/src/features/settings/useSettingsForm.js

@@ -16,6 +16,7 @@ const DEFAULT_FORM = {
     toolcall: { mode: 'feature_match', early_emit_confidence: 'high' },
     responses: { store_ttl_seconds: 900 },
     embeddings: { provider: '' },
+    auto_delete: { sessions: false },
     claude_mapping_text: '{\n  "fast": "deepseek-chat",\n  "slow": "deepseek-reasoner"\n}',
     model_aliases_text: '{}',
 }
@@ -55,6 +56,9 @@ function fromServerForm(data) {
         embeddings: {
             provider: data.embeddings?.provider || '',
         },
+        auto_delete: {
+            sessions: Boolean(data.auto_delete?.sessions || false),
+        },
         claude_mapping_text: JSON.stringify(data.claude_mapping || {}, null, 2),
         model_aliases_text: JSON.stringify(data.model_aliases || {}, null, 2),
     }
@@ -74,6 +78,7 @@ function toServerPayload(form) {
         },
         responses: { store_ttl_seconds: Number(form.responses.store_ttl_seconds) },
         embeddings: { provider: String(form.embeddings.provider || '').trim() },
+        auto_delete: { sessions: Boolean(form.auto_delete?.sessions) },
     }
 }