chore: add disconnect on unmount chat context

Author: bang9

packages/uikit-react-native/src/containers/SendbirdUIKitContainer.tsx

@@ -169,13 +169,11 @@ const SendbirdUIKitContainer = ({
     }
 
     return () => {
-      if (!isFirstMount) {
-        unsubscribes.current.forEach((u) => {
-          try {
-            u();
-          } catch {}
-        });
-      }
+      unsubscribes.current.forEach((u) => {
+        try {
+          u();
+        } catch {}
+      });
     };
   }, [appId, internalStorage]);
 

packages/uikit-react-native/src/contexts/SendbirdChatCtx.tsx

@@ -1,4 +1,4 @@
-import React, { useCallback, useState } from 'react';
+import React, { useCallback, useEffect, useState } from 'react';
 
 import { useAppFeatures } from '@sendbird/uikit-chat-hooks';
 import { SBUConfig, useUIKitConfig } from '@sendbird/uikit-tools';
@@ -144,6 +144,12 @@ export const SendbirdChatProvider = ({
     else if (status === 'background') sdkInstance.connectionState === 'OPEN' && sdkInstance.setBackgroundState();
   });
 
+  useEffect(() => {
+    return () => {
+      sdkInstance.disconnect().then(() => _setCurrentUser(undefined));
+    };
+  }, [sdkInstance]);
+
   const value: SendbirdChatContextType = {
     sdk: sdkInstance,
     emojiManager,