implement channel password management at local and /pass command handling.

app/src/main/java/com/bitchat/android/ui/ChannelManager.kt

@@ -285,8 +285,20 @@ class ChannelManager(
         state.setPasswordPromptChannel(null)
     }
 
-    fun setChannelPassword(channel: String, password: String): Boolean {
+    fun setChannelPassword(channel: String, password: String) {
-        return verifyChannelPassword(channel, password)
+
+        channelPasswords[channel] = password
+
+        channelKeys[channel] = deriveChannelKey(password, channel)
+
+        state.setPasswordProtectedChannels(
+            state.getPasswordProtectedChannelsValue().toMutableSet().apply { add(channel) }
+        )
+
+        dataManager.saveChannelData(
+            state.getJoinedChannelsValue(),
+            state.getPasswordProtectedChannelsValue()
+        )
     }
     
     // MARK: - Emergency Clear

app/src/main/java/com/bitchat/android/ui/CommandProcessor.kt

@@ -39,6 +39,7 @@ class CommandProcessor(
             "/m", "/msg" -> handleMessageCommand(parts, meshService)
             "/w" -> handleWhoCommand()
             "/clear" -> handleClearCommand()
+            "/pass" -> handlePassCommand(parts, myPeerID)
             "/block" -> handleBlockCommand(parts, meshService)
             "/unblock" -> handleUnblockCommand(parts, meshService)
             "/hug" -> handleActionCommand(parts, "gives", "a warm hug 🫂", meshService, myPeerID, onSendMessage)
@@ -54,7 +55,8 @@ class CommandProcessor(
         if (parts.size > 1) {
             val channelName = parts[1]
             val channel = if (channelName.startsWith("#")) channelName else "#$channelName"
-            val success = channelManager.joinChannel(channel, null, myPeerID)
+            val password = if (parts.size > 2) parts[2] else null
+            val success = channelManager.joinChannel(channel, password, myPeerID)
             if (success) {
                 val systemMessage = BitchatMessage(
                     sender = "system",
@@ -166,6 +168,52 @@ class CommandProcessor(
         }
     }
 
+    private fun handlePassCommand(parts: List<String>, peerID: String) {
+        val currentChannel = state.getCurrentChannelValue()
+
+        if (currentChannel == null) {
+            val systemMessage = BitchatMessage(
+                sender = "system",
+                content = "you must be in a channel to set a password.",
+                timestamp = Date(),
+                isRelay = false
+            )
+            messageManager.addMessage(systemMessage)
+            return
+        }
+
+        if (parts.size == 2){
+            if(!channelManager.isChannelCreator(channel = currentChannel, peerID = peerID)){
+                val systemMessage = BitchatMessage(
+                    sender = "system",
+                    content = "you must be the channel creator to set a password.",
+                    timestamp = Date(),
+                    isRelay = false
+                )
+                channelManager.addChannelMessage(currentChannel,systemMessage,null)
+                return
+            }
+            val newPassword = parts[1]
+            channelManager.setChannelPassword(currentChannel, newPassword)
+            val systemMessage = BitchatMessage(
+                sender = "system",
+                content = "password changed for channel $currentChannel",
+                timestamp = Date(),
+                isRelay = false
+            )
+            channelManager.addChannelMessage(currentChannel,systemMessage,null)
+        }
+        else{
+            val systemMessage = BitchatMessage(
+                sender = "system",
+                content = "usage: /pass <password>",
+                timestamp = Date(),
+                isRelay = false
+            )
+            channelManager.addChannelMessage(currentChannel,systemMessage,null)
+        }
+    }
+    
     private fun handleBlockCommand(parts: List<String>, meshService: Any) {
         if (parts.size > 1) {
             val targetName = parts[1].removePrefix("@")