refactor(desktop-client/home): drop engine subsystem snapshot panel

The transport/lease-manager/vault JSON dump was a debug artifact and
duplicated information already surfaced in the network and accounts
panels. Remove the panel and its styles.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/renderer/views/HomeView.vue

@@ -88,24 +88,6 @@ const activity = computed(() => snapshot.value?.activity ?? []);
 const blockedAccounts = computed(() =>
   accounts.value.filter((item) => ["expired", "revoked", "challenge_required"].includes(item.authState)),
 );
-
-const subsystemCards = computed(() => {
-  const subsystems = snapshot.value?.subsystems ?? {};
-  return [
-    {
-      title: "Transport",
-      detail: JSON.stringify(subsystems.transport ?? {}, null, 2),
-    },
-    {
-      title: "Lease Manager",
-      detail: JSON.stringify(subsystems.leaseManager ?? {}, null, 2),
-    },
-    {
-      title: "Vault",
-      detail: JSON.stringify(subsystems.vault ?? {}, null, 2),
-    },
-  ];
-});
 </script>
 
 <template>
@@ -207,23 +189,6 @@ const subsystemCards = computed(() => {
         </div>
       </article>
     </div>
-
-    <article class="modern-card panel-card">
-      <div class="card-header">
-         <div class="header-text">
-            <h3>引擎状态快照</h3>
-            <p>用于快速确认 transport、lease manager 和 vault 这三部分核心子系统是否处在正常工作状态。</p>
-         </div>
-      </div>
-      <div class="subsystem-grid">
-        <div v-for="card in subsystemCards" :key="card.title" class="subsystem-block">
-          <span class="title">{{ card.title }}</span>
-          <div class="code-block">
-             <pre>{{ card.detail }}</pre>
-          </div>
-        </div>
-      </div>
-    </article>
   </section>
 </template>
 
@@ -398,43 +363,6 @@ const subsystemCards = computed(() => {
 .feed-dot.danger { background-color: #ef4444; }
 .feed-dot.info { background-color: #0ea5e9; }
 
-/* Subsystems Bottom Panel */
-.subsystem-grid {
-  display: grid;
-  grid-template-columns: repeat(3, minmax(0, 1fr));
-  gap: 24px;
-}
-
-.subsystem-block {
-  display: flex;
-  flex-direction: column;
-  gap: 12px;
-}
-
-.subsystem-block .title {
-  font-size: 15px;
-  font-weight: 700;
-  color: #0f172a;
-}
-
-.code-block {
-  background: #f8fafc;
-  border: 1px solid #eef2f6;
-  border-radius: 14px;
-  padding: 20px;
-  overflow-x: auto;
-}
-
-.code-block pre {
-  margin: 0;
-  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
-  font-size: 13px;
-  color: #475569;
-  line-height: 1.6;
-  white-space: pre-wrap;
-  word-break: break-all;
-}
-
 /* Base Typo */
 .info-stack {
   display: flex;
@@ -475,7 +403,7 @@ const subsystemCards = computed(() => {
 
 /* Responsiveness */
 @media (max-width: 1024px) {
-  .panels-grid, .subsystem-grid {
+  .panels-grid {
     grid-template-columns: 1fr;
   }
 }