fix(realtime,ui): sync message deletes and channel delete/leave behavior

app/messages/router.py

@@ -13,6 +13,7 @@ from app.messages.schemas import (
     MessageStatusUpdateRequest,
     MessageUpdateRequest,
 )
+from app.messages.repository import get_message_by_id
 from app.messages.service import (
     create_chat_message,
     delete_message,
@@ -87,7 +88,10 @@ async def remove_message(
     current_user: User = Depends(get_current_user),
 ) -> None:
     if for_all:
+        message = await get_message_by_id(db, message_id)
         await delete_message_for_all(db, message_id=message_id, user_id=current_user.id)
+        if message:
+            await realtime_gateway.publish_chat_updated(chat_id=message.chat_id)
         return
     await delete_message(db, message_id=message_id, user_id=current_user.id)
 

app/messages/service.py

@@ -206,6 +206,11 @@ async def delete_message(db: AsyncSession, *, message_id: int, user_id: int) ->
     membership = await chats_repository.get_chat_member(db, chat_id=message.chat_id, user_id=user_id)
     if not membership:
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="You are not a member of this chat")
+    if chat.type == ChatType.CHANNEL and not chat.is_saved:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+            detail="Channel messages can only be deleted for everyone",
+        )
     # Telegram-like default: delete only for current user.
     hidden = await repository.get_hidden_message(db, message_id=message.id, user_id=user_id)
     if not hidden:

web/src/components/ChatList.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState } from "react";
 import { createPortal } from "react-dom";
-import { archiveChat, clearChat, createPrivateChat, deleteChat, getChats, getSavedMessagesChat, joinChat, pinChat, unarchiveChat, unpinChat } from "../api/chats";
+import { archiveChat, clearChat, createPrivateChat, deleteChat, getChats, getSavedMessagesChat, joinChat, leaveChat, pinChat, unarchiveChat, unpinChat } from "../api/chats";
 import { globalSearch } from "../api/search";
 import type { DiscoverChat, Message, UserSearchItem } from "../chat/types";
 import { addContact, addContactByEmail, listContacts, removeContact, updateMyProfile } from "../api/users";
@@ -50,7 +50,16 @@ export function ChatList() {
   const canDeleteForEveryone = Boolean(
     deleteModalChat &&
     !deleteModalChat.is_saved &&
-    (deleteModalChat.type === "group" || deleteModalChat.type === "private")
+    (
+      deleteModalChat.type === "group" ||
+      deleteModalChat.type === "private" ||
+      (deleteModalChat.type === "channel" && (deleteModalChat.my_role === "owner" || deleteModalChat.my_role === "admin"))
+    )
+  );
+  const channelMemberLeaveOnly = Boolean(
+    deleteModalChat &&
+    deleteModalChat.type === "channel" &&
+    deleteModalChat.my_role === "member"
   );
 
   useEffect(() => {
@@ -598,7 +607,13 @@ export function ChatList() {
                 setDeleteForAll(false);
               }}
             >
-              {chats.find((c) => c.id === ctxChatId)?.is_saved ? "Clear chat" : "Delete chat"}
+              {(() => {
+                const chat = chats.find((c) => c.id === ctxChatId);
+                if (!chat) return "Delete chat";
+                if (chat.is_saved) return "Clear chat";
+                if (chat.type === "channel" && chat.my_role === "member") return "Leave channel";
+                return "Delete chat";
+              })()}
             </button>
             <button
               className="block w-full rounded px-2 py-1.5 text-left text-sm hover:bg-slate-800"
@@ -653,10 +668,19 @@ export function ChatList() {
         <div className="absolute inset-0 z-50 flex items-end justify-center bg-slate-950/55 p-3">
           <div className="w-full rounded-xl border border-slate-700/80 bg-slate-900 p-3">
             <p className="mb-2 text-sm font-semibold">
-              {deleteModalChat?.is_saved ? "Clear chat" : "Delete chat"}: {deleteModalChat ? chatLabel(deleteModalChat) : "selected chat"}
+              {(deleteModalChat?.is_saved
+                ? "Clear chat"
+                : deleteModalChat?.type === "channel" && deleteModalChat.my_role === "member"
+                  ? "Leave channel"
+                  : "Delete chat")}
+              : {deleteModalChat ? chatLabel(deleteModalChat) : "selected chat"}
             </p>
             {deleteModalChat?.type === "channel" ? (
-              <p className="mb-3 text-xs text-slate-400">Channels are removed for all subscribers.</p>
+              <p className="mb-3 text-xs text-slate-400">
+                {channelMemberLeaveOnly
+                  ? "You will leave this channel."
+                  : "Channel deletion removes it for all subscribers."}
+              </p>
             ) : null}
             {deleteModalChat?.is_saved ? (
               <p className="mb-3 text-xs text-slate-400">This will clear all messages in Saved Messages.</p>
@@ -677,7 +701,11 @@ export function ChatList() {
                     setDeleteModalChatId(null);
                     return;
                   }
-                  await deleteChat(deleteModalChatId, canDeleteForEveryone && deleteForAll);
+                  if (channelMemberLeaveOnly) {
+                    await leaveChat(deleteModalChatId);
+                  } else {
+                    await deleteChat(deleteModalChatId, canDeleteForEveryone && deleteForAll);
+                  }
                   await loadChats();
                   if (activeChatId === deleteModalChatId) {
                     setActiveChatId(null);
@@ -685,7 +713,7 @@ export function ChatList() {
                   setDeleteModalChatId(null);
                 }}
               >
-                {deleteModalChat?.is_saved ? "Clear" : "Delete"}
+                {deleteModalChat?.is_saved ? "Clear" : channelMemberLeaveOnly ? "Leave" : "Delete"}
               </button>
               <button className="flex-1 rounded bg-slate-700 px-3 py-2 text-sm" onClick={() => setDeleteModalChatId(null)}>
                 Cancel

web/src/components/MessageList.tsx

@@ -94,6 +94,7 @@ export function MessageList() {
   const hasMore = Boolean(activeChatId && hasMoreByChat[activeChatId]);
   const isLoadingMore = Boolean(activeChatId && loadingMoreByChat[activeChatId]);
   const selectedMessages = useMemo(() => messages.filter((m) => selectedIds.has(m.id)), [messages, selectedIds]);
+  const channelOnlyDeleteForAll = activeChat?.type === "channel" && !activeChat?.is_saved;
   const canDeleteAllForSelection = useMemo(
     () => selectedMessages.length > 0 && selectedMessages.every((m) => canDeleteForEveryone(m, activeChat, me?.id)),
     [selectedMessages, activeChat, me?.id]
@@ -329,9 +330,11 @@ export function MessageList() {
         <div className="flex items-center justify-between border-b border-slate-700/50 bg-slate-900/80 px-3 py-2 text-xs">
           <span className="font-semibold text-slate-200">{selectedIds.size} selected</span>
           <div className="flex items-center gap-2">
-            <button className="rounded bg-red-500 px-2 py-1 font-semibold text-white" onClick={() => void deleteSelectedForMe()}>
-              Delete for me
-            </button>
+            {!channelOnlyDeleteForAll ? (
+              <button className="rounded bg-red-500 px-2 py-1 font-semibold text-white" onClick={() => void deleteSelectedForMe()}>
+                Delete for me
+              </button>
+            ) : null}
             {canDeleteAllForSelection ? (
               <button className="rounded bg-red-600 px-2 py-1 font-semibold text-white" onClick={() => void deleteSelectedForEveryone()}>
                 Delete for everyone
@@ -747,11 +750,17 @@ export function MessageList() {
         <div className="absolute inset-0 z-50 flex items-end justify-center bg-slate-950/55 p-3" onClick={() => setDeleteMessageId(null)}>
           <div className="w-full rounded-xl border border-slate-700/80 bg-slate-900 p-3" onClick={(event) => event.stopPropagation()}>
             <p className="mb-2 text-sm font-semibold">Delete message</p>
-            <p className="mb-3 text-xs text-slate-400">Choose how to delete this message.</p>
+            <p className="mb-3 text-xs text-slate-400">
+              {channelOnlyDeleteForAll
+                ? "In channels, messages can only be deleted for everyone."
+                : "Choose how to delete this message."}
+            </p>
             <div className="space-y-2">
-              <button className="w-full rounded bg-red-500 px-3 py-2 text-sm font-semibold text-white" onClick={() => void handleDelete(false)}>
-                Delete for me
-              </button>
+              {!channelOnlyDeleteForAll ? (
+                <button className="w-full rounded bg-red-500 px-3 py-2 text-sm font-semibold text-white" onClick={() => void handleDelete(false)}>
+                  Delete for me
+                </button>
+              ) : null}
               {canDeleteForEveryone(messagesMap.get(deleteMessageId), activeChat, me?.id) ? (
                 <button className="w-full rounded bg-red-600 px-3 py-2 text-sm font-semibold text-white" onClick={() => void handleDelete(true)}>
                   Delete for everyone
@@ -904,12 +913,15 @@ function chatLabel(chat: { display_title?: string | null; title: string | null;
 
 function canDeleteForEveryone(
   message: { sender_id: number } | undefined,
-  chat: { type: "private" | "group" | "channel"; is_saved?: boolean } | undefined,
+  chat: { type: "private" | "group" | "channel"; is_saved?: boolean; my_role?: "owner" | "admin" | "member" | null } | undefined,
   meId: number | undefined
 ): boolean {
   if (!message || !chat || !meId) return false;
   if (chat.is_saved) return false;
   if (chat.type === "private") return true;
+  if (chat.type === "channel") {
+    return chat.my_role === "owner" || chat.my_role === "admin";
+  }
   return message.sender_id === meId;
 }