fix(discord): honor agent media roots in replies

src/discord/monitor/message-handler.process.ts

@@ -27,6 +27,7 @@ import { resolveMarkdownTableMode } from "../../config/markdown-tables.js";
 import { readSessionUpdatedAt, resolveStorePath } from "../../config/sessions.js";
 import { danger, logVerbose, shouldLogVerbose } from "../../globals.js";
 import { convertMarkdownTables } from "../../markdown/tables.js";
+import { getAgentScopedMediaLocalRoots } from "../../media/local-roots.js";
 import { buildAgentSessionKey } from "../../routing/resolve-route.js";
 import { resolveThreadSessionKeys } from "../../routing/session-key.js";
 import { buildUntrustedChannelMetadata } from "../../security/channel-metadata.js";
@@ -128,6 +129,7 @@ export async function processDiscordMessage(ctx: DiscordMessagePreflightContext)
     accountId,
   });
   const removeAckAfterReply = cfg.messages?.removeAckAfterReply ?? false;
+  const mediaLocalRoots = getAgentScopedMediaLocalRoots(cfg, route.agentId);
   const shouldAckReaction = () =>
     Boolean(
       ackReaction &&
@@ -668,6 +670,7 @@ export async function processDiscordMessage(ctx: DiscordMessagePreflightContext)
           chunkMode,
           sessionKey: ctxPayload.SessionKey,
           threadBindings,
+          mediaLocalRoots,
         });
         replyReference.markSent();
       },