style(desktop): let main views fill available width and drop settings client badge

Remove the 1400px max-width cap on Home/Accounts/AiPlatforms/PublishManagement
so content stretches with the window, and clean up the unused online-clients
badge from the settings sidebar.

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

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

@@ -756,7 +756,9 @@ const tableColumns = [
   flex-direction: column;
   gap: 32px;
   padding-bottom: 40px;
-  max-width: 1400px;
+  width: 100%;
+  max-width: none;
+  box-sizing: border-box;
 }
 
 /* 顶部信息区 */

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

@@ -545,7 +545,9 @@ async function unbindPlatform(account: AccountRow) {
   flex-direction: column;
   gap: 32px;
   padding-bottom: 40px;
-  max-width: 1400px;
+  width: 100%;
+  max-width: none;
+  box-sizing: border-box;
 }
 
 /* Hero Section */

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

@@ -270,7 +270,9 @@ const issueItems = computed<RuntimeIssueItem[]>(() => {
   flex-direction: column;
   gap: 24px;
   padding-bottom: 40px;
-  max-width: 1400px;
+  width: 100%;
+  max-width: none;
+  box-sizing: border-box;
 }
 
 /* Metrics Top Grid */

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

@@ -894,7 +894,9 @@ const tableScroll = { x: 1080 } as const
   flex-direction: column;
   gap: 32px;
   padding-bottom: 40px;
-  max-width: 1400px;
+  width: 100%;
+  max-width: none;
+  box-sizing: border-box;
 }
 
 /* Hero Section (aligned with AccountsView) */

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

@@ -53,7 +53,6 @@ const subsystemEntries = computed(() =>
   })),
 )
 
-const clientCount = computed(() => snapshot.value?.summary.onlineClients ?? 0)
 const appVersion = computed(() => snapshot.value?.app.version ?? '0.1.0')
 const hasServerSettingChanged = computed(
   () => normalizeServerURLInput(serverBaseURL.value) !== apiBaseURL.value,
@@ -177,9 +176,6 @@ watch(apiBaseURL, (next) => {
         >
           <component :is="item.icon" class="settings-nav__icon" />
           <span>{{ item.title }}</span>
-          <span v-if="item.key === 'diagnostics' && clientCount > 0" class="settings-nav__badge">
-            {{ clientCount }}
-          </span>
         </button>
       </nav>
     </aside>
@@ -379,21 +375,6 @@ watch(apiBaseURL, (next) => {
   color: #080808;
 }
 
-.settings-nav__badge {
-  margin-left: auto;
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  min-width: 22px;
-  height: 22px;
-  padding: 0 7px;
-  border-radius: 11px;
-  background: #c4c4ca;
-  color: #111111;
-  font-size: 12px;
-  font-weight: 700;
-}
-
 .settings-main {
   position: relative;
   display: flex;