fix: filter timeline markers by current export folder

Subprofile exports (folder_suffix) created markers that interleaved
with main folder markers, shifting their numbering. Now get_markers
and _get_markers_for accept an export_folder parameter and use
SQL LIKE to only return markers whose output_path is in that folder.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/db.py

@@ -358,7 +358,18 @@ class ProcessedDB:
             self._con.commit()
             return paths
 
-    def _get_markers_for(self, match: str, profile: str = "default") -> list[tuple[float, int, str, float]]:
+    def _get_markers_for(self, match: str, profile: str = "default",
+                         export_folder: str = "") -> list[tuple[float, int, str, float]]:
+        if export_folder:
+            rows = self._con.execute(
+                "SELECT start_time, output_path, clip_duration, clip_count, spread"
+                " FROM processed"
+                " WHERE filename = ? AND profile = ? AND scan_export = 0"
+                "   AND output_path LIKE ?"
+                " ORDER BY start_time",
+                (match, profile, export_folder.rstrip("/") + "/%"),
+            ).fetchall()
+        else:
             rows = self._con.execute(
                 "SELECT start_time, output_path, clip_duration, clip_count, spread"
                 " FROM processed"
@@ -375,13 +386,15 @@ class ProcessedDB:
                 seen_times[t] = (t, n, p, span)
         return list(seen_times.values())
 
-    def get_markers(self, filename: str, profile: str = "default") -> list[tuple[float, int, str, float]]:
+    def get_markers(self, filename: str, profile: str = "default",
+                    export_folder: str = "") -> list[tuple[float, int, str, float]]:
         """Return [(start_time, marker_number, output_path, clip_span), ...]
         for exact filename match, sorted by start_time. Empty list if no match.
-        Excludes scan exports (shown via scan panel instead)."""
+        Excludes scan exports (shown via scan panel instead).
+        If export_folder is set, only markers in that folder are returned."""
         if not self._enabled:
             return []
-        return self._get_markers_for(filename, profile)
+        return self._get_markers_for(filename, profile, export_folder)
 
     def get_manual_export_groups(self, filename: str, profile: str = "default"
                                 ) -> list[dict]:

main.py

@@ -46,15 +46,18 @@ class _DBWorker(QThread):
     """Runs ProcessedDB fuzzy-match lookup off the main thread."""
     result = pyqtSignal(str, object, list)  # (queried_filename, match|None, markers)
 
-    def __init__(self, db: "ProcessedDB", filename: str, profile: str = "default"):
+    def __init__(self, db: "ProcessedDB", filename: str, profile: str = "default",
+                 export_folder: str = ""):
         super().__init__()
         self._db = db
         self._filename = filename
         self._profile = profile
+        self._export_folder = export_folder
 
     def run(self):
         try:
-            markers = self._db._get_markers_for(self._filename, self._profile)
+            markers = self._db._get_markers_for(
+                self._filename, self._profile, self._export_folder)
         except Exception:
             markers = []
         self.result.emit(self._filename, self._filename if markers else None, markers)
@@ -4193,7 +4196,8 @@ class MainWindow(QMainWindow):
 
         # Run DB fuzzy match off the main thread — can be slow on large databases.
         filename = os.path.basename(self._file_path)
-        self._db_worker = _DBWorker(self._db, filename, self._profile)
+        self._db_worker = _DBWorker(self._db, filename, self._profile,
+                                    self._txt_folder.text())
         self._db_worker.result.connect(self._on_db_result)
         self._db_worker.start()
 
@@ -4209,7 +4213,8 @@ class MainWindow(QMainWindow):
 
     def _refresh_markers(self) -> None:
         filename = os.path.basename(self._file_path)
-        markers = self._db.get_markers(filename, self._profile)
+        markers = self._db.get_markers(filename, self._profile,
+                                       self._txt_folder.text())
         self._timeline.set_markers(markers)
 
     def _refresh_playlist_checks(self) -> None: