Slack: infer interaction channel type from channel ID

src/slack/monitor/events/interactions.test.ts

@@ -87,7 +87,7 @@ function createContext() {
 describe("registerSlackInteractionEvents", () => {
   it("enqueues structured events and updates button rows", async () => {
     enqueueSystemEventMock.mockReset();
-    const { ctx, app, getHandler } = createContext();
+    const { ctx, app, getHandler, resolveSessionKey } = createContext();
     registerSlackInteractionEvents({ ctx: ctx as never });
 
     const handler = getHandler();
@@ -142,6 +142,10 @@ describe("registerSlackInteractionEvents", () => {
       channelId: "C1",
       messageTs: "100.200",
     });
+    expect(resolveSessionKey).toHaveBeenCalledWith({
+      channelId: "C1",
+      channelType: undefined,
+    });
     expect(app.client.chat.update).toHaveBeenCalledTimes(1);
   });
 

src/slack/monitor/events/interactions.ts

@@ -253,7 +253,7 @@ export function registerSlackInteractionEvents(params: { ctx: SlackMonitorContex
       // Pass undefined (not "unknown") to allow proper main session fallback
       const sessionKey = ctx.resolveSlackSystemEventSessionKey({
         channelId: channelId,
-        channelType: "channel",
+        channelType: undefined,
       });
 
       // Build context key - only include defined values to avoid "unknown" noise