feat: P3 batch 2 - sidebar resize, DB features, Status/SlowLog, editor improvements

- Resizable sidebar (200-500px, localStorage persistence)
- DB auto-detection (CONFIG GET databases) + key count in dropdown
- DB memory (last selected DB per connection)
- Status auto-refresh toggle + search filter + key statistics table
- SlowLog config display (threshold + max len)
- Large value protection (>20MB placeholder + download)
- Hash field TTL (HEXPIRE support detection)
- Editor inline filters (Hash/Set/Zset)
- Zset ASC/DESC sort toggle
- CLI auto-sync SELECT + refresh key list on write commands
- i18n keys for all features (zh-CN + en)

src/stores/connection.ts

@@ -42,8 +42,17 @@ export const useConnectionStore = defineStore('connection', () => {
   const serverInfoMap = ref<Record<string, string>>({})
   const healthMap = ref<Record<string, boolean>>({})
   const currentDb = ref<number>(0)
+  const lastDbMap = ref<Record<string, number>>({})
   const healthTimers = new Map<string, ReturnType<typeof setInterval>>()
 
+  // Load lastDbMap from localStorage
+  try {
+    const saved = localStorage.getItem('lastDbMap')
+    if (saved) {
+      lastDbMap.value = JSON.parse(saved)
+    }
+  } catch { /* ignore */ }
+
   const activeConnection = computed(() =>
     connections.value.find((c: ConnectionConfig) => c.id === activeId.value) ?? null
   )
@@ -123,6 +132,14 @@ export const useConnectionStore = defineStore('connection', () => {
         connectedIds.value.push(conn.id)
         activeId.value = conn.id
         serverInfoMap.value[conn.id] = await window.electronAPI.redis.getInfo(conn.id)
+        // Restore last selected DB for this connection
+        const lastDb = lastDbMap.value[conn.id] ?? 0
+        if (lastDb !== 0) {
+          try {
+            await window.electronAPI.redis.selectDb(conn.id, lastDb)
+          } catch { /* ignore */ }
+        }
+        currentDb.value = lastDb
         startHealthCheck(conn.id)
       } else {
         error.value = result.error || 'Connection failed'
@@ -134,9 +151,16 @@ export const useConnectionStore = defineStore('connection', () => {
     }
   }
 
-  function switchTo(id: string) {
+  async function switchTo(id: string) {
     if (connectedIds.value.includes(id)) {
       activeId.value = id
+      const lastDb = lastDbMap.value[id] ?? 0
+      if (lastDb !== currentDb.value) {
+        try {
+          await window.electronAPI.redis.selectDb(id, lastDb)
+        } catch { /* ignore */ }
+      }
+      currentDb.value = lastDb
     }
   }
 
@@ -253,6 +277,12 @@ export const useConnectionStore = defineStore('connection', () => {
     return data
   }
 
+  function saveLastDb(connId: string, db: number) {
+    lastDbMap.value[connId] = db
+    currentDb.value = db
+    localStorage.setItem('lastDbMap', JSON.stringify(lastDbMap.value))
+  }
+
   async function importConnections(jsonStr: string): Promise<number> {
     try {
       const imported = JSON.parse(jsonStr) as ConnectionConfig[]
@@ -274,9 +304,10 @@ export const useConnectionStore = defineStore('connection', () => {
   }
 
   return {
-    connections, activeId, connectedIds, connecting, error, serverInfo, healthOk, currentDb,
+    connections, activeId, connectedIds, connecting, error, serverInfo, healthOk, currentDb, lastDbMap,
     activeConnection, isConnected,
     loadConnections, decryptPassword, getInfo, saveConnection, deleteConnection, reorderConnections,
     connect, disconnect, disconnectById, switchTo, isConnectedById, testConnection, exportConnections, importConnections,
+    saveLastDb,
   }
 })