most solid commit

cht/window.py

@@ -237,6 +237,28 @@ class ChtWindow(Adw.ApplicationWindow):
         self._update_scrub_bar_manifest()
         self._populate_model_dropdown()
 
+    def _reload_waveform(self, mgr):
+        """Recompute waveform from existing segments in background."""
+        segments = mgr.recording_segments
+        if not segments:
+            return
+        from cht.stream import ffmpeg as ff
+
+        def _compute():
+            audio_dir = mgr.audio_dir
+            audio_dir.mkdir(parents=True, exist_ok=True)
+            full_wav = audio_dir / "full.wav"
+            try:
+                ff.extract_audio_chunk(segments[0], full_wav)
+                self._waveform_engine.compute_full(full_wav)
+                peaks = self._waveform_engine.peaks
+                bucket_dur = self._waveform_engine.bucket_duration
+                GLib.idle_add(self._waveform_widget.set_peaks, peaks.copy(), bucket_dur)
+            except Exception as e:
+                log.error("Waveform reload failed: %s", e)
+
+        Thread(target=_compute, daemon=True, name="waveform_reload").start()
+
     # -- Streaming --
 
     def _start_stream(self, session_id=None):
@@ -256,6 +278,7 @@ class ChtWindow(Adw.ApplicationWindow):
         if session_id:
             self._load_existing_frames()
             self._load_existing_transcript()
+            self._reload_waveform(mgr)
 
         self.set_title(f"{APP_NAME} — {mgr.session_id}")
         log.info("Waiting for sender...")
@@ -406,6 +429,14 @@ class ChtWindow(Adw.ApplicationWindow):
 
         Thread(target=_capture, daemon=True, name="scrub_capture").start()
 
+    def _manual_segment_cut(self):
+        """Ctrl+R: manually cut recording into a new segment."""
+        if not self._lifecycle.is_streaming:
+            return
+        log.info("Manual segment cut requested")
+        self._lifecycle._rotate_segment()
+        self._agent_output.append("Segment cut.\n")
+
     def _stop_stream(self, reload_session=False):
         log.info("Stopping stream...")
         mgr = self._lifecycle.stream_mgr
@@ -523,6 +554,14 @@ class ChtWindow(Adw.ApplicationWindow):
         kb.bind(KEY_DELETE, lambda **_: self._agent_output.clear())
         kb.attach(self)
 
+        # Ctrl+R: manual segment cut
+        ctrl_r = Gtk.ShortcutController()
+        ctrl_r.add_shortcut(Gtk.Shortcut(
+            trigger=Gtk.ShortcutTrigger.parse_string("<Ctrl>r"),
+            action=Gtk.CallbackAction.new(lambda *_: self._manual_segment_cut()),
+        ))
+        self.add_controller(ctrl_r)
+
     # -- Agent actions --
 
     def _build_selection_message(self, verb: str) -> str | None:
@@ -635,7 +674,7 @@ class ChtWindow(Adw.ApplicationWindow):
             self._known_frames.add(fid)
             try:
                 pixbuf = GdkPixbuf.Pixbuf.new_from_file_at_scale(str(entry["path"]), 256, 144, True)
-                auto = not self._transcript_panel.has_selection
+                auto = self._timeline.state.live and not self._transcript_panel.has_selection
                 self._frames_panel.add_item(fid, pixbuf, entry["timestamp"], auto_select=auto)
                 self._timeline_controls.scrub_bar.add_frame(entry["timestamp"], str(entry["path"]))
             except Exception as e: