style: optimize DB selector dropdown

- Replace el-select with custom el-dropdown for compact tab bar fit
- Trigger: compact pill with DB name + key count badge + arrow
- Dropdown: two-column layout (DB index + custom name | key count badge + edit icon)
- Edit icon hidden until hover, colored on hover
- Selected DB highlighted with accent color
- Remove duplicate style block
- Key counts formatted (10k+ → '10k')

src/components/DbSelector.vue

@@ -28,27 +28,27 @@ function loadCustomNames() {
   }
 }
 
-function getDbLabel(dbIndex: number): string {
-  const count = dbKeyCounts.value[dbIndex]
+function getDbShortLabel(dbIndex: number): string {
   const customName = customDbNames.value[String(dbIndex)]
-  const baseLabel = count !== undefined && count > 0
-    ? `DB${dbIndex} (${t('db.keyCount', { n: count })})`
-    : count === 0
-      ? `DB${dbIndex} (${t('db.noKeys')})`
-      : `DB${dbIndex}`
-  if (customName) {
-    return `${baseLabel} - ${customName}`
+  return customName || `DB${dbIndex}`
 }
-  return baseLabel
+
+function getDbKeyCount(dbIndex: number): number | undefined {
+  return dbKeyCounts.value[dbIndex]
 }
 
 const dbList = computed(() => {
   return Array.from({ length: dbCount.value }, (_, i) => ({
     value: i,
-    label: getDbLabel(i),
+    label: getDbShortLabel(i),
+    count: getDbKeyCount(i),
+    customName: customDbNames.value[String(i)] || '',
   }))
 })
 
+const currentLabel = computed(() => getDbShortLabel(selectedDb.value))
+const currentCount = computed(() => getDbKeyCount(selectedDb.value))
+
 async function handleEditName(dbIndex: number, event: MouseEvent) {
   event.stopPropagation()
   const currentName = customDbNames.value[String(dbIndex)] || ''
@@ -80,7 +80,6 @@ async function handleEditName(dbIndex: number, event: MouseEvent) {
 async function fetchDbInfo() {
   if (!connStore.activeId) return
   try {
-    // Get actual DB count from CONFIG GET databases
     const configResult = await window.electronAPI.redis.execute(
       connStore.activeId, 'CONFIG', ['GET', 'databases']
     )
@@ -92,7 +91,6 @@ async function fetchDbInfo() {
   }
 
   try {
-    // Parse INFO keyspace for per-DB key counts
     const info = await connStore.getInfo()
     const keyspace: Record<number, number> = {}
     const match = info.match(/# Keyspace[\s\S]*?(?=\n#|$)/)
@@ -105,7 +103,6 @@ async function fetchDbInfo() {
         }
       }
     }
-    // Mark DBs with 0 keys explicitly
     for (let i = 0; i < dbCount.value; i++) {
       if (!(i in keyspace)) {
         keyspace[i] = 0
@@ -142,31 +139,53 @@ async function switchDb(db: number) {
   connStore.saveLastDb(connStore.activeId, db)
   await keyStore.selectDb(connStore.activeId, db)
 }
+
+function formatCount(n: number): string {
+  if (n >= 10000) return `${(n / 1000).toFixed(0)}k`
+  return String(n)
+}
 </script>
 
 <template>
   <div class="db-selector" v-if="connStore.isConnected">
-    <span class="db-label">DB</span>
-    <el-select
-      :model-value="selectedDb"
-      size="small"
-      @change="switchDb"
-      style="width: 160px"
-    >
-      <el-option
+    <el-dropdown trigger="click" @command="switchDb" placement="bottom-start">
+      <div class="db-trigger">
+        <span class="db-trigger-label">{{ currentLabel }}</span>
+        <span v-if="currentCount !== undefined && currentCount > 0" class="db-trigger-badge">
+          {{ formatCount(currentCount) }}
+        </span>
+        <el-icon class="db-trigger-arrow"><ArrowDown /></el-icon>
+      </div>
+      <template #dropdown>
+        <el-dropdown-menu class="db-dropdown">
+          <div class="db-dropdown-header">
+            <span>{{ t('db.label') }}</span>
+          </div>
+          <el-dropdown-item
             v-for="db in dbList"
             :key="db.value"
-        :label="db.label"
-        :value="db.value"
+            :command="db.value"
+            :class="{ 'is-selected': db.value === selectedDb }"
           >
-        <div class="db-option-content">
-          <span class="db-option-label">{{ db.label }}</span>
-          <el-icon class="db-edit-icon" @click="(e: MouseEvent) => handleEditName(db.value, e)">
+            <div class="db-option">
+              <div class="db-option-left">
+                <span class="db-option-index">DB{{ db.value }}</span>
+                <span v-if="db.customName" class="db-option-name">{{ db.customName }}</span>
+              </div>
+              <div class="db-option-right">
+                <span v-if="db.count !== undefined && db.count > 0" class="db-option-count">
+                  {{ formatCount(db.count) }}
+                </span>
+                <span v-else class="db-option-empty">{{ t('db.noKeys') }}</span>
+                <el-icon class="db-option-edit" @click="(e: MouseEvent) => handleEditName(db.value, e)">
                   <EditPen />
                 </el-icon>
               </div>
-      </el-option>
-    </el-select>
+            </div>
+          </el-dropdown-item>
+        </el-dropdown-menu>
+      </template>
+    </el-dropdown>
   </div>
 </template>
 
@@ -174,84 +193,155 @@ async function switchDb(db: number) {
 .db-selector {
   display: flex;
   align-items: center;
-  gap: 4px;
-  padding: 0 8px;
 }
 
-.db-label {
+/* Trigger button — compact, fits in tab bar */
+.db-trigger {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 10px;
+  background: var(--bg-card);
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 12px;
+  color: var(--text-primary);
+  transition: all 0.15s;
+  white-space: nowrap;
+  user-select: none;
+}
+
+.db-trigger:hover {
+  border-color: var(--accent);
+  background: var(--bg-hover);
+}
+
+.db-trigger-label {
+  font-weight: 600;
+  font-family: 'Cascadia Code', 'Fira Code', monospace;
+}
+
+.db-trigger-badge {
+  font-size: 10px;
+  font-weight: 700;
+  color: var(--accent-light);
+  background: var(--accent-bg, rgba(99, 102, 241, 0.15));
+  padding: 1px 6px;
+  border-radius: 8px;
+  line-height: 1.4;
+}
+
+.db-trigger-arrow {
   font-size: 10px;
   color: var(--text-muted);
-  font-weight: 600;
+  transition: transform 0.15s;
 }
 
-.db-option-content {
+.db-trigger:hover .db-trigger-arrow {
+  color: var(--accent-light);
+}
+
+/* Dropdown */
+:deep(.db-dropdown) {
+  min-width: 200px;
+  max-height: 360px;
+  overflow-y: auto;
+}
+
+.db-dropdown-header {
+  padding: 6px 12px;
+  font-size: 10px;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: var(--text-muted);
+  border-bottom: 1px solid var(--border-color);
+}
+
+:deep(.el-dropdown-menu__item) {
+  padding: 0;
+}
+
+:deep(.el-dropdown-menu__item.is-selected) {
+  background: var(--bg-card-active);
+  color: var(--accent-light);
+}
+
+.db-option {
   display: flex;
   align-items: center;
   justify-content: space-between;
   width: 100%;
+  padding: 6px 12px;
+  gap: 8px;
 }
 
-.db-option-label {
-  flex: 1;
+.db-option-left {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  min-width: 0;
+}
+
+.db-option-index {
+  font-size: 12px;
+  font-weight: 600;
+  font-family: 'Cascadia Code', 'Fira Code', monospace;
+  color: var(--text-primary);
+  flex-shrink: 0;
+}
+
+.db-option-name {
+  font-size: 11px;
+  color: var(--accent-light);
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
 
-.db-edit-icon {
-  font-size: 12px;
-  cursor: pointer;
-  opacity: 0.4;
-  transition: opacity 0.2s;
-  margin-left: 4px;
+.db-option-right {
+  display: flex;
+  align-items: center;
+  gap: 6px;
   flex-shrink: 0;
 }
 
-.db-edit-icon:hover {
-  opacity: 1;
-  color: var(--accent);
+.db-option-count {
+  font-size: 10px;
+  font-weight: 600;
+  color: var(--accent-light);
+  background: var(--accent-bg, rgba(99, 102, 241, 0.15));
+  padding: 1px 6px;
+  border-radius: 8px;
 }
 
-:deep(.el-select .el-input__wrapper) {
-  background: var(--bg-card);
-  border-color: var(--border-color);
-  box-shadow: none;
-}
-
-:deep(.el-select .el-input__wrapper:hover) {
-  border-color: var(--border-accent);
-}
-
-:deep(.el-select .el-input__wrapper.is-focus) {
-  border-color: var(--accent);
-}
-</style>
-
-<style scoped>
-.db-selector {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  padding: 0 8px;
-}
-
-.db-label {
+.db-option-empty {
   font-size: 10px;
   color: var(--text-muted);
-  font-weight: 600;
 }
 
-:deep(.el-select .el-input__wrapper) {
-  background: var(--bg-card);
-  border-color: var(--border-color);
-  box-shadow: none;
+.db-option-edit {
+  font-size: 11px;
+  cursor: pointer;
+  opacity: 0;
+  color: var(--text-muted);
+  transition: opacity 0.15s, color 0.15s;
+  padding: 2px;
+  border-radius: 3px;
 }
 
-:deep(.el-select .el-input__wrapper:hover) {
-  border-color: var(--border-accent);
+.el-dropdown-menu__item:hover .db-option-edit {
+  opacity: 0.6;
 }
 
-:deep(.el-select .el-input__wrapper.is-focus) {
-  border-color: var(--accent);
+.db-option-edit:hover {
+  opacity: 1 !important;
+  color: var(--accent);
+  background: var(--bg-hover);
+}
+
+:deep(.is-selected) .db-option-index {
+  color: var(--accent-light);
 }
 </style>