Capture team chat and expose moderation match archives

tests/unit/moderation-evidence.test.ts

@@ -50,7 +50,7 @@ async function create(overrides: Record<string, unknown> = {}) {
     });
 }
 
-async function archive(messages: Array<{ guid?: string; message: string }>) {
+async function archive(messages: Array<{ guid?: string; message: string; channel?: 'team' }>) {
     const { saveTelemetry } = await import('../../src/lib/server/fleet/telemetry.js');
     const { matchChatTimeline } = await import('../../src/lib/server/fleet/chat.js');
     saveTelemetry({
@@ -77,7 +77,8 @@ async function archive(messages: Array<{ guid?: string; message: string }>) {
                     guid: message.guid ?? '123',
                     slot: message.guid ? 2 : 1,
                     player: message.guid ? 'Witness' : 'Subject',
-                    message: message.message
+                    message: message.message,
+                    ...(message.channel ? { channel: message.channel } : {})
                 }
             })
         );
@@ -155,6 +156,31 @@ it('allows a new witness reply alongside an attached subject and deduplicates la
     expect(await detail(id)).toEqual(attached);
 });
 
+it('preserves team chat separately when matching evidence saved before message identifiers', async () => {
+    const { matchId, entries } = await archive([
+        { message: 'Same words', channel: 'team' },
+        { message: 'Same words' }
+    ]);
+    const { id } = await create({
+        evidence: { matchId, messageIds: [entries[1].messageId] }
+    });
+    // A legacy public-chat snapshot has no selected IDs or channel field.
+    handle
+        .prepare('UPDATE moderation_evidence SET snapshot=? WHERE case_id=?')
+        .run(JSON.stringify({ matchId, entry: entries[1] }), id);
+    await mutate({
+        op: 'attach-evidence',
+        id,
+        revision: 1,
+        evidence: { matchId, messageIds: [entries[0].messageId] }
+    });
+    const attached = await detail(id);
+    expect(attached.case.evidence).toHaveLength(2);
+    const snapshot = JSON.parse(attached.case.evidence[1].snapshot!);
+    expect(snapshot.entry.message.channel).toBe('team');
+    expect(snapshot.selectedMessageIds).toEqual([entries[0].messageId]);
+});
+
 it('validates selection and context bounds and rolls back opening a case with invalid evidence', async () => {
     const { matchId, entries } = await archive([{ message: 'Subject statement' }]);
     const messageId = entries[0].messageId!;