v2.1.1: Auto配置改为模型粒度拖动排序 + 历史缓存复用 + 对话生图

- Auto配置编辑: 粒度从提供商改为具体模型, 原生HTML5拖动排序, 修复已保存模型不显示勾选(字符串/对象混拼bug)
- 历史缓存: 带历史上下文的auto请求按首条消息识别会话, 优先复用上次模型命中上游前缀缓存
  (可配置: prefer_cache_model + cache_ttl_seconds, 系统配置页开关 + /api/admin/routing)
- 对话生图: chat页选 auto-image/Qwen-Image 直接调生图接口并在对话内展示图片
- 修复: Flask模板缓存导致改模板不生效 -> TEMPLATES_AUTO_RELOAD
- 修复: 自动回退/显式有序模型列表路由, 空列表回退提供商能力选择

templates/config.html

@@ -84,6 +84,32 @@
                     </div>
                 </div>
                 
+                <div class="bg-white rounded-xl border border-gray-100 p-6">
+                    <h2 class="text-lg font-semibold text-gray-800 mb-4">路由缓存（历史上下文优先复用上次模型）</h2>
+                    <div class="space-y-4">
+                        <div class="flex items-center justify-between p-4 bg-gray-50 rounded-lg">
+                            <div>
+                                <p class="font-medium text-gray-800">优先复用上次模型</p>
+                                <p class="text-sm text-gray-500 mt-1">带历史上下文的 auto 请求，优先使用上一次成功响应的模型，命中上游前缀缓存、节省成本</p>
+                            </div>
+                            <button id="cacheToggle" onclick="toggleCacheModel()" class="relative w-12 h-6 rounded-full transition ${data.routing_config.prefer_cache_model ? 'bg-green-500' : 'bg-gray-300'}">
+                                <span id="cacheKnob" class="absolute top-0.5 w-5 h-5 bg-white rounded-full shadow transition ${data.routing_config.prefer_cache_model ? 'left-6' : 'left-0.5'}"></span>
+                            </button>
+                        </div>
+                        <div class="flex items-end gap-3 p-4 bg-gray-50 rounded-lg">
+                            <div class="flex-1">
+                                <label class="block text-sm font-medium text-gray-700 mb-1">记忆有效期（秒）</label>
+                                <input type="number" id="cacheTtl" value="${data.routing_config.cache_ttl_seconds}"
+                                    class="w-full px-3 py-2 border border-gray-300 rounded-lg">
+                                <p class="text-xs text-gray-500 mt-1">超过该时长后不再强制复用，重新按顺序选择</p>
+                            </div>
+                            <button onclick="saveRouting()" class="px-4 py-2 gradient-bg text-white rounded-lg hover:opacity-90">
+                                <i class="ri-save-line mr-1"></i> 保存
+                            </button>
+                        </div>
+                    </div>
+                </div>
+
                 <div class="bg-white rounded-xl border border-gray-100 p-6">
                     <h2 class="text-lg font-semibold text-gray-800 mb-4">提供商配置</h2>
                     <div class="space-y-4">
@@ -127,6 +153,45 @@
             `;
         }
 
+        async function toggleCacheModel() {
+            const data = await (await fetch('/api/admin/routing')).json();
+            const newVal = !data.prefer_cache_model;
+            const res = await fetch('/api/admin/routing', {
+                method: 'PUT',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ prefer_cache_model: newVal })
+            });
+            const result = await res.json();
+            if (result.success) {
+                const btn = document.getElementById('cacheToggle');
+                const knob = document.getElementById('cacheKnob');
+                if (newVal) {
+                    btn.classList.remove('bg-gray-300'); btn.classList.add('bg-green-500');
+                    knob.classList.remove('left-0.5'); knob.classList.add('left-6');
+                } else {
+                    btn.classList.remove('bg-green-500'); btn.classList.add('bg-gray-300');
+                    knob.classList.remove('left-6'); knob.classList.add('left-0.5');
+                }
+            } else {
+                alert('保存失败: ' + (result.error || ''));
+            }
+        }
+
+        async function saveRouting() {
+            const ttl = parseInt(document.getElementById('cacheTtl').value) || 3600;
+            const res = await fetch('/api/admin/routing', {
+                method: 'PUT',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ cache_ttl_seconds: ttl })
+            });
+            const result = await res.json();
+            if (result.success) {
+                alert('✅ 已保存');
+            } else {
+                alert('保存失败: ' + (result.error || ''));
+            }
+        }
+
         loadConfig();
     </script>
 </body>