some fixes

cht/agent/openai_compat_provider.py

@@ -99,9 +99,9 @@ class OpenAICompatProvider(AgentProvider):
             f"Recording duration: {m:02d}:{s:02d}",
             f"Total frames: {len(context.frames)}",
         ]
-        if context.transcript_segments:
-            ctx_lines.append(f"\nTranscript ({len(context.transcript_segments)} segments):")
-            for t in context.transcript_segments:
+        if context.mentioned_transcripts:
+            ctx_lines.append("\nTranscript:")
+            for t in context.mentioned_transcripts:
                 tm1, ts1 = divmod(int(t.start), 60)
                 tm2, ts2 = divmod(int(t.end), 60)
                 ctx_lines.append(f"  {t.id} [{tm1:02d}:{ts1:02d}-{tm2:02d}:{ts2:02d}] {t.text}")