fix(host): 修掉会杀死 DSH 的 resolveModelInfo unhandled rejection；按真实事件结构(event.data)重写镜像映射；标题栏与指标显示打磨

shell/ui.html

@@ -82,18 +82,27 @@
 
         #title {
             flex: 1 1 auto;
+            min-width: 0;
+            display: flex;
+            align-items: center;
+            gap: 6px;
             font-size: var(--title-font);
             font-weight: 600;
-            white-space: nowrap;
-            overflow: hidden;
-            text-overflow: ellipsis;
             letter-spacing: .2px;
         }
 
+        #titleText {
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+            flex: 1 1 auto;
+            min-width: 0;
+        }
+
         #title small {
+            flex: 0 0 auto;
             color: var(--fg-dim);
             font-weight: 400;
-            margin-left: 6px;
         }
 
         .tbtn {
@@ -472,7 +481,7 @@
     <div id="app">
         <div id="bar">
             <div class="dot wait" id="dot"></div>
-            <div id="title">DSH 悬浮窗<small id="sub">未连接</small></div>
+            <div id="title"><span id="titleText">DSH 悬浮窗</span><small id="sub">未连接</small></div>
             <button class="tbtn" id="bPin" title="固定位置">
                 <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round">
                     <path d="M9 4h6l-1 6 3 3v1H7v-1l3-3-1-6z" />
@@ -650,18 +659,26 @@
             if (msg.type === 'cmd') return handleCmd(msg.cmd)
             if (msg.metrics) metrics(msg.metrics)
             if (msg.messages) messages(msg.messages)
-            if (msg.title) $('title').firstChild.textContent = msg.title
+            if (msg.title) {
+                const t = String(msg.title).slice(0, 42)
+                $('titleText').textContent = 'DSH · ' + t
+            }
         }
 
         function metrics(m) {
             $('m-turn').textContent = m.turns ?? '—'
             $('m-step').textContent = m.steps ?? '—'
-            $('m-tps').textContent = (m.tps ?? 0).toFixed ? (m.tps ?? 0).toFixed(1) : '—'
-            $('m-mtok').textContent = ((m.tokens ?? 0) / 1e6).toFixed(3)
+            $('m-tps').textContent = m.tps == null ? '—' : Number(m.tps).toFixed(1)
+            $('m-mtok').textContent = m.tokens == null ? '—' : (m.tokens / 1e6).toFixed(3)
             $('m-cache').textContent = m.cacheHit == null ? '—' : Math.round(m.cacheHit * 100) + '%'
-            const p = Math.max(0, Math.min(1, m.contextUsed ?? 0))
-            $('m-ctxbar').style.right = (100 - p * 100) + '%'
-            $('m-ctx').textContent = Math.round(p * 100) + '%'
+            if (m.contextUsed == null) {
+                $('m-ctxbar').style.right = '100%'
+                $('m-ctx').textContent = '—'
+            } else {
+                const p = Math.max(0, Math.min(1, m.contextUsed))
+                $('m-ctxbar').style.right = (100 - p * 100) + '%'
+                $('m-ctx').textContent = Math.round(p * 100) + '%'
+            }
         }
 
         function messages(list) {