Webapp: Copy transcript uses generic 'Speaker 1/2/3' instead of resolved speaker names

[omi-discord-vector]

Bug

Repro:

1. Login to home.omi.me
2. Open any conversation — speaker names display correctly in the transcript pane
3. Click kebab menu → Copy Transcript
4. Paste elsewhere

Expected: Pasted transcript contains the resolved speaker names as shown in the UI.

Actual: Pasted transcript contains generic "Speaker 1", "Speaker 2", "Speaker 3" labels instead of the actual names.

Reported by community member in Discord.