feat(ui): include API runtime status in debug transcript export

Added 'runtimeMode' and 'runtimeStatus' to the 'Copy Debug' transcript. This helps diagnose model loading errors or API initialization issues when users export chat logs for troubleshooting.

tauri-app/src/lib/chatDebug.test.ts

@@ -21,6 +21,8 @@ describe("formatChatDebugTranscript", () => {
           created_at: 1710000060,
         },
       ],
+      runtimeMode: "remote",
+      runtimeStatus: "ready",
     });
 
     expect(output).toContain("Chat ID: 7");