fix: KeyList TDZ crash and connection state desync

- Move filteredKeys computed before useVirtualizer in KeyList.vue to
  fix ReferenceError (Cannot access 'filteredKeys' before initialization)
  that crashed the component setup and cascaded into '.t is not a
  function' render errors.
- Wrap getInfo in try-catch in connection store connect() to clean up
  connectedIds/activeId when the client is lost between connect and
  getInfo, preventing a state where isConnected is true but no Redis
  client exists in the main process.

src/stores/connection.ts

@@ -131,7 +131,16 @@ export const useConnectionStore = defineStore('connection', () => {
       if (result.success) {
         connectedIds.value.push(conn.id)
         activeId.value = conn.id
-        serverInfoMap.value[conn.id] = await window.electronAPI.redis.getInfo(conn.id)
+        try {
+          serverInfoMap.value[conn.id] = await window.electronAPI.redis.getInfo(conn.id)
+        } catch {
+          // Client was lost between connect and getInfo — clean up to avoid
+          // leaving the renderer in a state where isConnected is true but no
+          // actual Redis client exists in the main process.
+          await disconnectById(conn.id)
+          error.value = 'Connection established but server info unavailable'
+          return
+        }
         // Restore last selected DB for this connection
         const lastDb = lastDbMap.value[conn.id] ?? 0
         if (lastDb !== 0) {