feat: Qwen3 Coder 480B as primary + Gemma 4 31B as fallback

- Set main model to qwen/qwen3-coder:free (Qwen3-Coder-480B-A35B)
- Add fallback_model: google/gemma-4-31b-it:free (auto-failover)
- Dashboard: show fallback model info in status + model panels
- entry.py: expose fallback_model in /api/status response

config.yaml

@@ -1,5 +1,8 @@
 model: qwen/qwen3-coder:free
 provider: openrouter
+fallback_model:
+  provider: openrouter
+  model: google/gemma-4-31b-it:free
 max_turns: 90
 platforms:
   feishu:

dashboard.html

@@ -207,7 +207,8 @@ body{font-family:-apple-system,"SF Pro Display","Noto Sans SC","PingFang SC","He
           <div class="card purple"><div class="card-label">进程 PID</div><div class="card-val" id="x-pid2">--</div></div>
           <div class="card cyan"><div class="card-label">活跃会话</div><div class="card-val" id="x-sess2">0</div></div>
           <div class="card cyan"><div class="card-label">连接平台</div><div class="card-val" id="x-plat2">飞书</div><div class="card-sub" id="x-plat-s2">WebSocket</div></div>
-          <div class="card orange"><div class="card-label">当前模型</div><div class="card-val" id="x-model2">--</div><div class="card-sub">OpenRouter</div></div>
+          <div class="card orange"><div class="card-label">当前模型</div><div class="card-val" id="x-model2">--</div><div class="card-sub" id="x-model-sub">OpenRouter</div></div>
+          <div class="card" style="border-color:var(--border)"><div class="card-label">备用模型</div><div class="card-val" id="x-fallback">--</div><div class="card-sub">自动回退</div></div>
         </div>
 
         <div class="sec-title">配置详情</div>
@@ -241,6 +242,7 @@ body{font-family:-apple-system,"SF Pro Display","Noto Sans SC","PingFang SC","He
         <div class="sec-title">模型信息</div>
         <div class="cfg-list">
           <div class="cfg-row"><span class="cfg-k">当前模型</span><span class="cfg-v" id="x-cur-model">--</span></div>
+          <div class="cfg-row"><span class="cfg-k">备用模型</span><span class="cfg-v" id="x-cur-fallback" style="color:var(--tx3)">--</span></div>
           <div class="cfg-row"><span class="cfg-k">提供商</span><span class="cfg-v">OpenRouter</span></div>
           <div class="cfg-row"><span class="cfg-k">状态</span><span class="cfg-v" id="x-model-status" style="color:var(--accent)">运行中</span></div>
         </div>
@@ -376,6 +378,11 @@ async function poll(){
     var modelName=(d.model||'--').split('/').pop();
     document.getElementById('x-model2').textContent=modelName.length>25?modelName.substring(0,25)+'…':modelName;
     document.getElementById('x-cur-model').textContent=modelName.length>35?modelName.substring(0,35)+'…':modelName;
+    if(d.fallback_model){
+      var fbName=d.fallback_model.split('/').pop();
+      document.getElementById('x-fallback').textContent=fbName.length>25?fbName.substring(0,25)+'…':fbName;
+      document.getElementById('x-cur-fallback').textContent=fbName.length>35?fbName.substring(0,35)+'…':fbName;
+    }
     document.getElementById('x-model-status').textContent=d.running?'运行中':'已停止';
     document.getElementById('x-model-status').style.color=d.running?'var(--accent)':'var(--red)';
     // Config

entry.py

@@ -332,12 +332,15 @@ class DashboardHandler(BaseHTTPRequestHandler):
 
         model = cfg.get("model", env.get("LLM_MODEL", "unknown"))
         provider = cfg.get("provider", "openrouter")
+        fallback = cfg.get("fallback_model", {})
+        fallback_model = fallback.get("model", "") if isinstance(fallback, dict) else ""
 
         return {
             "running": is_running,
             "pid": pid,
             "model": model,
             "provider": provider,
+            "fallback_model": fallback_model,
             "platform": "飞书 Feishu",
             "platform_mode": "WebSocket",
             "sessions": _get_sessions_count(),