chore: upgrade CLIProxyAPI dependency to v7 across the project

- Updated all references from v6 to v7 for `github.com/router-for-me/CLIProxyAPI`.
- Ensured consistency in imports within core libraries, tests, and integration tests.
- Added missing tests for new features in Redis Protocol integration.

internal/home/global.go

@@ -0,0 +1,25 @@
+package home
+
+import "sync/atomic"
+
+var currentClient atomic.Value // *Client
+
+// SetCurrent sets the active home client used by runtime integrations.
+func SetCurrent(client *Client) {
+	currentClient.Store(client)
+}
+
+// Current returns the active home client instance, if any.
+func Current() *Client {
+	if v := currentClient.Load(); v != nil {
+		if client, ok := v.(*Client); ok {
+			return client
+		}
+	}
+	return nil
+}
+
+// ClearCurrent removes the active home client.
+func ClearCurrent() {
+	currentClient.Store((*Client)(nil))
+}