feat(kimi-web): rename session delete to archive in UI

- i18n: add archiveConfirm and archive keys (zh/en)
- SessionRow: change delete confirm overlay and menu button to archive
- MobileSwitcherSheet: change delete button to archive
- Keep workspace delete as-is (separate from session archive)

apps/kimi-web/src/components/MobileSwitcherSheet.vue

@@ -195,7 +195,7 @@ function onDelete(id: string): void {
             <!-- Kebab menu -->
             <div v-if="menuFor === s.id" class="kmenu" @click.stop>
               <button class="kitem" @click.stop="onRename(s)">{{ t('sidebar.rename') }}</button>
-              <button class="kitem del" @click.stop="onDelete(s.id)">{{ t('sidebar.delete') }}</button>
+              <button class="kitem archive" @click.stop="onDelete(s.id)">{{ t('sidebar.archive') }}</button>
             </div>
           </div>
         </div>
@@ -372,5 +372,5 @@ function onDelete(id: string): void {
   padding: 10px 14px;
 }
 .kitem:active { background: var(--panel2); }
-.kitem.del { color: var(--err); }
+.kitem.archive { color: var(--err); }
 </style>

apps/kimi-web/src/components/SessionRow.vue

@@ -107,7 +107,7 @@ defineExpose({ closeMenu, cancelDelete });
   <div class="se" :class="{ on: active }" @click="emit('select', session.id)">
     <!-- Delete confirm overlay -->
     <div v-if="confirming" class="del-confirm" @click.stop>
-      <span class="del-label">{{ t('sidebar.deleteConfirm') }}</span>
+      <span class="del-label">{{ t('sidebar.archiveConfirm') }}</span>
       <button class="btn-confirm" @click.stop="confirmDelete">{{ t('sidebar.confirm') }}</button>
       <button class="btn-cancel" @click.stop="cancelDelete">{{ t('sidebar.cancel') }}</button>
     </div>
@@ -166,7 +166,7 @@ defineExpose({ closeMenu, cancelDelete });
         </button>
         <div class="menu-divider" />
         <button class="menu-item" @click.stop="startRename">{{ t('sidebar.rename') }}</button>
-        <button class="menu-item del" @click.stop="startDelete">{{ t('sidebar.delete') }}</button>
+        <button class="menu-item archive" @click.stop="startDelete">{{ t('sidebar.archive') }}</button>
       </div>
     </template>
   </div>
@@ -296,7 +296,7 @@ defineExpose({ closeMenu, cancelDelete });
   padding: 6px 12px;
 }
 .menu-item:hover { background: var(--panel2); }
-.menu-item.del { color: var(--err); }
+.menu-item.archive { color: var(--err); }
 
 .menu-divider {
   height: 1px;
@@ -317,14 +317,14 @@ defineExpose({ closeMenu, cancelDelete });
   min-width: 0;
 }
 
-.del-confirm {
+.archive-confirm {
   display: flex;
   align-items: center;
   gap: 6px;
   padding: 4px 0;
   font-size: 11px;
 }
-.del-label { color: var(--err); flex: 1; }
+.archive-label { color: var(--err); flex: 1; }
 .btn-confirm {
   background: var(--err);
   color: #fff;

apps/kimi-web/src/i18n/locales/en/sidebar.ts

@@ -4,12 +4,14 @@ export default {
   newSession: 'New Session',
   newWorkspace: 'New Workspace',
   emptyState: 'No sessions yet · click New Session to start',
+  archiveConfirm: 'Archive session?',
   deleteConfirm: 'Delete session?',
   confirm: 'Confirm',
   cancel: 'Cancel',
   options: 'Options',
   rename: 'Rename',
   copyPath: 'Copy path',
+  archive: 'Archive',
   delete: 'Delete',
   brand: 'Kimi Code',
   signedIn: 'Signed in',

apps/kimi-web/src/i18n/locales/zh/sidebar.ts

@@ -4,12 +4,14 @@ export default {
   newSession: '新建会话',
   newWorkspace: '新建工作区',
   emptyState: '还没有会话 · 点击 新建会话 开始',
+  archiveConfirm: '归档会话?',
   deleteConfirm: '删除会话?',
   confirm: '确认',
   cancel: '取消',
   options: '选项',
   rename: '重命名',
   copyPath: '复制路径',
+  archive: '归档',
   delete: '删除',
   brand: 'Kimi Code',
   signedIn: '已登录',