bxctl: chat --speaker NAME, the speaker on every turn of the chat

Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>

crates/bxctl/src/main.rs

@@ -201,7 +201,15 @@ fn run_turn_twice(
         input,
         out: &mut handle,
     };
-    match stream_turn(&opts.socket, session, text, resume, &approvals, &mut io) {
+    match stream_turn(
+        &opts.socket,
+        session,
+        text,
+        resume,
+        opts.speaker.as_deref(),
+        &approvals,
+        &mut io,
+    ) {
         Err(e) => Err(RunError::Io(e)),
         Ok(Ok(done)) => {
             write_answer(opts, &done).map_err(RunError::Io)?;
@@ -214,7 +222,15 @@ fn run_turn_twice(
                 input,
                 out: &mut handle,
             };
-            match stream_turn(&opts.socket, session, text, false, &approvals, &mut io) {
+            match stream_turn(
+                &opts.socket,
+                session,
+                text,
+                false,
+                opts.speaker.as_deref(),
+                &approvals,
+                &mut io,
+            ) {
                 Err(e) => Err(RunError::Io(e)),
                 Ok(Ok(done)) => {
                     write_answer(opts, &done).map_err(RunError::Io)?;
@@ -272,6 +288,7 @@ fn run_interactive(opts: &ChatOptions, reader: &mut dyn BufRead) -> ExitCode {
             this_session,
             text,
             resume,
+            opts.speaker.as_deref(),
             &approvals,
             &mut io,
         ) {