fix(desktop): discover remote channel agents

desktop/src/features/agents/lib/agentAutocompleteEligibility.test.mjs

@@ -229,7 +229,7 @@ test("autocomplete helper extraction preserves safe filtering and labels", () =>
   );
 });
 
-test("isAgentIdentityInAllowedList: keeps people and only explicitly allowed agent identities", () => {
+test("isAgentIdentityInAllowedList: keeps people, channel members, and explicitly allowed agents", () => {
   const allowedAgentPubkeys = new Set([PUB_A]);
 
   assert.equal(
@@ -253,6 +253,13 @@ test("isAgentIdentityInAllowedList: keeps people and only explicitly allowed age
     ),
     false,
   );
+  assert.equal(
+    isAgentIdentityInAllowedList(
+      { isAgent: true, isMember: true, pubkey: PUB_B },
+      allowedAgentPubkeys,
+    ),
+    true,
+  );
 });
 
 test("shouldHideAgentFromMentions: never hides non-agents", () => {

desktop/src/features/agents/lib/agentAutocompleteEligibility.ts

@@ -83,11 +83,12 @@ export function getMentionableAgentPubkeys({
 }
 
 export function isAgentIdentityInAllowedList(
-  candidate: { isAgent?: boolean; pubkey: string },
+  candidate: { isAgent?: boolean; isMember?: boolean; pubkey: string },
   allowedAgentPubkeys: ReadonlySet<string>,
 ) {
   return (
     candidate.isAgent !== true ||
+    candidate.isMember === true ||
     allowedAgentPubkeys.has(normalizePubkey(candidate.pubkey))
   );
 }