refactor: KeyList 移除列表模式, 只保留树状模式

- 移除 viewMode、虚拟滚动 (useVirtualizer)、scrollRef
- 移除列表视图模板和样式 (.key-flat-list, .key-item 等)
- 移除工具栏的列表/树状切换按钮
- 树状叶子节点新增多选 checkbox (原先只有列表模式有)
- 保留 .key-checkbox 样式供树状多选使用

src/renderer/src/components/KeyList.vue

@@ -1,6 +1,5 @@
 <script setup lang="ts">
-import { ref, watch, computed, onMounted, onUnmounted } from 'vue'
+import { ref, computed, onMounted, onUnmounted } from 'vue'
-import { useVirtualizer } from '@tanstack/vue-virtual'
 import { useKeyStore } from '@renderer/stores/key'
 import { useConnectionStore } from '@renderer/stores/connection'
 import { useI18n } from '@renderer/i18n'
@@ -13,7 +12,6 @@ const { t } = useI18n()
 
 const filterText = ref('')
 const patternInput = ref('*')
-const viewMode = ref<'list' | 'tree'>('list')
 const multiSelect = ref(false)
 const selectedKeys = ref<Set<string>>(new Set())
 const expandedFolders = ref<Set<string>>(new Set())
@@ -26,7 +24,7 @@ const contextMenu = ref<{ visible: boolean; x: number; y: number; key: string }>
 // Shift+Click range selection
 const lastClickedIndex = ref<number>(-1)
 
-// Filtered keys (must be declared before useVirtualizer which references it)
+// Filtered keys
 const filteredKeys = computed(() => {
   const keys = keyStore.keys.map(k => k.name)
   return filterText.value
@@ -34,19 +32,6 @@ const filteredKeys = computed(() => {
     : keys
 })
 
-// Virtual scrolling
-const scrollRef = ref<HTMLElement>()
-const useVirtualization = computed(() => viewMode.value === 'list' && filteredKeys.value.length > 100)
-const virtualizer = useVirtualizer(
-  computed(() => ({
-    count: filteredKeys.value.length,
-    getScrollElement: () => scrollRef.value ?? null,
-    estimateSize: () => 32,
-    overscan: 5,
-    enabled: useVirtualization.value,
-  }))
-)
-
 // Search history
 const HISTORY_KEY = 'keySearchHistory'
 const MAX_HISTORY = 20
@@ -503,10 +488,6 @@ function isKeyMultiSelected(keyName: string): boolean {
   return selectedKeys.value.has(keyName)
 }
 
-watch(filterText, () => {
-  // Filter is reactive via computed
-})
-
 defineExpose({ deselectAll })
 
 // Listen for refresh-key-list event from CLI write commands
@@ -591,15 +572,6 @@ onUnmounted(() => {
         <el-button size="small" @click="refreshKeys" :disabled="!connStore.activeId">
           <el-icon><Refresh /></el-icon>
         </el-button>
-        <el-tooltip :content="viewMode === 'list' ? t('key.switchTree') : t('key.switchList')" placement="top">
-          <el-button
-            size="small"
-            :type="viewMode === 'tree' ? 'primary' : 'default'"
-            @click="viewMode = viewMode === 'list' ? 'tree' : 'list'"
-          >
-            <el-icon><component :is="viewMode === 'list' ? 'FolderOpened' : 'List'" /></el-icon>
-          </el-button>
-        </el-tooltip>
         <el-button
           size="small"
           :type="multiSelect ? 'danger' : 'default'"
@@ -623,78 +595,8 @@ onUnmounted(() => {
     </div>
 
     <div class="key-content">
-      <!-- List View -->
-      <div v-if="viewMode === 'list'" ref="scrollRef" class="key-flat-list" :class="{ virtualized: useVirtualization }">
-        <!-- Virtualized list for large datasets -->
-        <template v-if="useVirtualization">
-          <div
-            :style="{
-              height: `${virtualizer.getTotalSize()}px`,
-              width: '100%',
-              position: 'relative',
-            }"
-          >
-            <div
-              v-for="vItem in virtualizer.getVirtualItems()"
-              :key="String(vItem.key)"
-              :style="{
-                position: 'absolute',
-                top: 0,
-                left: 0,
-                width: '100%',
-                transform: `translateY(${vItem.start}px)`,
-              }"
-            >
-              <div
-                class="key-item"
-                :class="{
-                  active: isKeySelected(filteredKeys[vItem.index]),
-                  selected: isKeyMultiSelected(filteredKeys[vItem.index]),
-                }"
-                @click="selectKey(filteredKeys[vItem.index], $event)"
-                @contextmenu.prevent="onKeyContextMenu($event, filteredKeys[vItem.index])"
-              >
-                <input
-                  v-if="multiSelect"
-                  type="checkbox"
-                  class="key-checkbox"
-                  :checked="isKeyMultiSelected(filteredKeys[vItem.index])"
-                  @click.stop
-                />
-                <el-icon class="key-icon"><Document /></el-icon>
-                <span class="key-name">{{ formatKeyName(filteredKeys[vItem.index]) }}</span>
-              </div>
-            </div>
-          </div>
-        </template>
-        <!-- Non-virtualized list for small datasets -->
-        <template v-else>
-          <div
-            v-for="keyName in filteredKeys"
-            :key="keyName"
-            class="key-item"
-            :class="{
-              active: isKeySelected(keyName),
-              selected: isKeyMultiSelected(keyName),
-            }"
-            @click="selectKey(keyName, $event)"
-            @contextmenu.prevent="onKeyContextMenu($event, keyName)"
-          >
-            <input
-              v-if="multiSelect"
-              type="checkbox"
-              class="key-checkbox"
-              :checked="isKeyMultiSelected(keyName)"
-              @click.stop
-            />
-            <el-icon class="key-icon"><Document /></el-icon>
-            <span class="key-name">{{ formatKeyName(keyName) }}</span>
-          </div>
-        </template>
-      </div>
-
       <!-- Tree View -->
-      <div v-else class="key-tree">
+      <div class="key-tree">
         <template v-for="item in flattenedTree" :key="item.node.fullPath">
           <!-- Folder -->
           <div
@@ -719,6 +621,13 @@ onUnmounted(() => {
             @click="selectKey(item.node.fullPath, $event)"
             @contextmenu.prevent="onKeyContextMenu($event, item.node.fullPath)"
           >
+            <input
+              v-if="multiSelect"
+              type="checkbox"
+              class="key-checkbox"
+              :checked="isKeyMultiSelected(item.node.fullPath)"
+              @click.stop
+            />
             <el-icon class="tree-icon"><Document /></el-icon>
             <span class="tree-name">{{ formatKeyName(item.node.name) }}</span>
           </div>
@@ -855,38 +764,6 @@ onUnmounted(() => {
   overflow-y: auto;
 }
 
-.key-flat-list.virtualized {
-  height: 100%;
-  overflow-y: auto;
-}
-
-.key-item {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-  padding: 8px 12px;
-  cursor: pointer;
-  font-size: 12px;
-  color: var(--text-secondary);
-  border-bottom: 1px solid var(--border-subtle);
-  transition: background 0.15s, color 0.15s;
-}
-
-.key-item:hover {
-  background: var(--bg-hover);
-  color: var(--text-primary);
-}
-
-.key-item.active {
-  background: var(--accent-bg);
-  color: var(--accent-light);
-}
-
-.key-item.selected {
-  background: rgba(245, 108, 108, 0.08);
-  color: var(--color-red);
-}
-
 .key-checkbox {
   flex-shrink: 0;
   width: 14px;
@@ -894,22 +771,6 @@ onUnmounted(() => {
   accent-color: var(--accent-light);
 }
 
-.key-icon {
-  flex-shrink: 0;
-  color: var(--text-muted);
-}
-
-.key-item.active .key-icon {
-  color: var(--accent-light);
-}
-
-.key-name {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  font-family: 'Cascadia Code', 'Fira Code', monospace;
-}
-
 /* Tree View Styles */
 .tree-item {
   display: flex;