fix(channels): normalize MIME kind parsing and reaction fallbacks

src/signal/monitor/event-handler.mention-gating.test.ts

@@ -146,6 +146,31 @@ describe("signal mention gating", () => {
     );
   });
 
+  it("normalizes mixed-case parameterized attachment MIME in skipped pending history", async () => {
+    capturedCtx = undefined;
+    const groupHistories = new Map();
+    const handler = createSignalEventHandler(
+      createBaseSignalEventHandlerDeps({
+        cfg: createSignalConfig({ requireMention: true }),
+        historyLimit: 5,
+        groupHistories,
+        ignoreAttachments: false,
+      }),
+    );
+
+    await handler(
+      makeGroupEvent({
+        message: "",
+        attachments: [{ contentType: " Audio/Ogg; codecs=opus " }],
+      }),
+    );
+
+    expect(capturedCtx).toBeUndefined();
+    const entries = groupHistories.get("g1");
+    expect(entries).toHaveLength(1);
+    expect(entries[0].body).toBe("<media:audio>");
+  });
+
   it("records quote text in pending history for skipped quote-only group messages", async () => {
     await expectSkippedGroupHistory({ message: "", quoteText: "quoted context" }, "quoted context");
   });

src/signal/monitor/event-handler.ts

@@ -29,7 +29,7 @@ import { resolveChannelGroupRequireMention } from "../../config/group-policy.js"
 import { readSessionUpdatedAt, resolveStorePath } from "../../config/sessions.js";
 import { danger, logVerbose, shouldLogVerbose } from "../../globals.js";
 import { enqueueSystemEvent } from "../../infra/system-events.js";
-import { mediaKindFromMime } from "../../media/constants.js";
+import { kindFromMime } from "../../media/mime.js";
 import { resolveAgentRoute } from "../../routing/resolve-route.js";
 import {
   DM_GROUP_ACCESS_REASON,
@@ -636,7 +636,7 @@ export function createSignalEventHandler(deps: SignalEventHandlerDeps) {
           return "<media:attachment>";
         }
         const firstContentType = dataMessage.attachments?.[0]?.contentType;
-        const pendingKind = mediaKindFromMime(firstContentType ?? undefined);
+        const pendingKind = kindFromMime(firstContentType ?? undefined);
         return pendingKind ? `<media:${pendingKind}>` : "<media:attachment>";
       })();
       const pendingBodyText = messageText || pendingPlaceholder || quoteText;
@@ -679,7 +679,7 @@ export function createSignalEventHandler(deps: SignalEventHandlerDeps) {
       }
     }
 
-    const kind = mediaKindFromMime(mediaType ?? undefined);
+    const kind = kindFromMime(mediaType ?? undefined);
     if (kind) {
       placeholder = `<media:${kind}>`;
     } else if (dataMessage.attachments?.length) {

src/signal/send.ts

@@ -1,6 +1,6 @@
 import { loadConfig } from "../config/config.js";
 import { resolveMarkdownTableMode } from "../config/markdown-tables.js";
-import { mediaKindFromMime } from "../media/constants.js";
+import { kindFromMime } from "../media/mime.js";
 import { resolveOutboundAttachmentFromUrl } from "../media/outbound-attachment.js";
 import { resolveSignalAccount } from "./accounts.js";
 import { signalRpcRequest } from "./client.js";
@@ -130,7 +130,7 @@ export async function sendMessageSignal(
       localRoots: opts.mediaLocalRoots,
     });
     attachments = [resolved.path];
-    const kind = mediaKindFromMime(resolved.contentType ?? undefined);
+    const kind = kindFromMime(resolved.contentType ?? undefined);
     if (!message && kind) {
       // Avoid sending an empty body when only attachments exist.
       message = kind === "image" ? "<media:image>" : `<media:${kind}>`;