fix(desktop): retain automatic mentions only in threads

desktop/src/features/channels/ui/ChannelPane.tsx

@@ -754,7 +754,6 @@ export const ChannelPane = React.memo(function ChannelPane({
                   ) : null}
                   <ComposerDockBackdrop gutterClassName="inset-x-5" />
                   <MessageComposer
-                    audienceContext={{ type: "channel" }}
                     channelId={activeChannel?.id ?? null}
                     channelName={activeChannel?.name ?? "channel"}
                     channelType={activeChannel?.channelType ?? null}

desktop/src/features/home/ui/InboxDetailPane.tsx

@@ -495,6 +495,10 @@ function InboxMessageDetailPane({
       : null;
   const isThreadContext =
     !isDirectMessage && hasInboxThreadContext(item, messages);
+  const threadRootTags = isThreadContext
+    ? (displayMessages.find((message) => message.id === item.conversationId)
+        ?.tags ?? [])
+    : [];
   const contextLabel = isThreadContext
     ? isDirectMessage
       ? `Thread with ${item.senderLabel}`
@@ -804,7 +808,14 @@ function InboxMessageDetailPane({
           />
           <div className="pointer-events-auto">
             <MessageComposer
-              audienceContext={isDirectMessage ? null : { type: "thread" }}
+              audienceContext={
+                isDirectMessage
+                  ? null
+                  : {
+                      type: "thread",
+                      rootTags: threadRootTags,
+                    }
+              }
               channelId={item.item.channelId}
               channelName={item.channelLabel ?? "channel"}
               channelType={composerChannelType}

desktop/src/features/messages/ui/ComposerAddressControls.test.mjs

@@ -72,7 +72,7 @@ test("mention control expands with automatically mentioned agents", async () =>
   const avatar = view.getByTestId("composer-address-lock-agent-pubkey");
   assert.ok(avatar);
   const manage = view.getByRole("button", {
-    name: "Manage automatic agent mentions",
+    name: "Manage mentions",
   });
   assert.match(manage.className, /(?:^|\s)-ml-2(?:\s|$)/);
   assert.match(manage.className, /(?:^|\s)pl-2(?:\s|$)/);
@@ -82,18 +82,18 @@ test("mention control expands with automatically mentioned agents", async () =>
     /(?:^|\s)pr-1\.5(?:\s|$)/,
   );
   assert.match(
-    view.getByRole("button", { name: "Manage automatic agent mentions" })
-      .parentElement?.className ?? "",
+    view.getByRole("button", { name: "Manage mentions" }).parentElement
+      ?.className ?? "",
     /(?:^|\s)bg-primary\/15(?:\s|$)/,
   );
   assert.match(
-    view.getByRole("button", { name: "Manage automatic agent mentions" })
-      .parentElement?.className ?? "",
+    view.getByRole("button", { name: "Manage mentions" }).parentElement
+      ?.className ?? "",
     /(?:^|\s)text-primary(?:\s|$)/,
   );
   assert.doesNotMatch(
-    view.getByRole("button", { name: "Manage automatic agent mentions" })
-      .parentElement?.className ?? "",
+    view.getByRole("button", { name: "Manage mentions" }).parentElement
+      ?.className ?? "",
     /(?:^|\s)bg-accent\/70(?:\s|$)/,
   );
   assert.doesNotMatch(

desktop/src/features/messages/ui/ComposerAddressControls.tsx

@@ -180,11 +180,7 @@ export function ComposerMentionButton({
           <Tooltip disableHoverableContent>
             <TooltipTrigger asChild>
               <button
-                aria-label={
-                  hasAgents
-                    ? "Manage automatic agent mentions"
-                    : "Mention someone"
-                }
+                aria-label={hasAgents ? "Manage mentions" : "Mention someone"}
                 className={cn(
                   "flex h-8 items-center justify-center rounded-lg focus-visible:outline-hidden focus-visible:ring-1 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50",
                   showActiveChrome
@@ -205,9 +201,7 @@ export function ComposerMentionButton({
               </button>
             </TooltipTrigger>
             <TooltipContent>
-              {hasAgents
-                ? "Manage automatic agent mentions"
-                : "Mention someone"}
+              {hasAgents ? "Manage mentions" : "Mention someone"}
             </TooltipContent>
           </Tooltip>
           <AnimatePresence