feat: add support for Router provider and enhance command handling

src/app/runtime/actions/mod.rs

@@ -577,7 +577,7 @@ fn run_agent_turn(
         };
 
         let mut stream_started = false;
-        let (response, usage) = tc.client.chat_with_tools_streaming(
+        let (response, usage) = match tc.client.chat_with_tools_streaming(
             &wire_msgs,
             Some(tc.tdefs.clone()),
             Some(tc.temperature),
@@ -602,8 +602,21 @@ fn run_agent_turn(
                 }
                 _ => {}
             },
-        )?;
-        let _ = usage; // already emitted as TurnEvent::Usage inside the on_event callback, if present
+        ) {
+            Ok(result) => result,
+            Err(_stream_err) => {
+                // Provider doesn't support streaming — fall back to non-streaming
+                let (msg, usage_fb) = tc.client.chat_with_tools_non_streaming(
+                    &wire_msgs, Some(tc.tdefs.clone()),
+                )?;
+                if let Some((tok_in, tok_out)) = usage_fb {
+                    if let Ok(mut q) = events_q.lock() {
+                        q.push_back(TurnEvent::Usage { tokens_in: tok_in, tokens_out: tok_out });
+                    }
+                }
+                (msg, usage_fb)
+            }
+        };
 
         let has_tool_calls = response.tool_calls.is_some()
             && response.tool_calls.as_ref().is_some_and(|tc| !tc.is_empty());