feat: add immediate cache refresh after scan completion and exclude pending items from missing German detection to prevent showing unscanned files

Call refresh_library_cache() after scan completion to immediately publish scanned metadata. Add needs_missing_scan check that only triggers missing scan when German review candidates exist without German tracks. Filter out pending items from missing_german_movies/missing_german_series to prevent showing unscanned files as missing German while background scanner processes them

app.py

@@ -1021,6 +1021,8 @@ def start_scan(source, force=False, rows_snapshot=None, series_snapshot=None):
                 future.result()
                 with job_lock: jobs[source]["done"] += 1
             with job_lock: jobs[source]["state"] = "done"
+            # Publish the newly scanned metadata immediately to the cache.
+            refresh_library_cache()
         except Exception as exc:
             log.error("%s-Scan fehlgeschlagen: %s", source, error_summary(exc)); jobs[source]["error"] = str(exc); jobs[source]["state"] = "error"
     executor.submit(work)
@@ -1054,7 +1056,14 @@ def refresh_library_cache():
         start_scan("radarr", force=True, rows_snapshot=rows)
     if series and any(row.get("pending") for group in series for row in group["episodes"]):
         start_scan("sonarr", force=True, series_snapshot=series)
-    if rows or series:
+    needs_missing_scan = any(
+        row.get("local_path") != "—" and is_german_review_candidate(row) and not has_german_track(row)
+        for row in rows
+    ) or any(
+        episode.get("local_path") != "—" and is_german_review_candidate(episode) and not has_german_track(episode)
+        for group in series for episode in group["episodes"]
+    )
+    if needs_missing_scan:
         start_scan("missing", force=True, rows_snapshot=rows, series_snapshot=series)
     log.info("Bibliotheks-Sync abgeschlossen: %s Filme, %s Serien", len(rows), len(series))
 
@@ -1079,10 +1088,12 @@ def index():
         rows = list(library_cache["rows"])
         series = list(library_cache["series"])
         error = library_cache["error"]
-    missing_german_movies = [row for row in rows if is_german_review_candidate(row) and not has_german_track(row)]
+    # Unscanned files have no language information yet and must not be shown
+    # as missing German while the background scanner is still processing them.
+    missing_german_movies = [row for row in rows if is_german_review_candidate(row) and not row.get("pending") and not has_german_track(row)]
     missing_german_series = []
     for group in series:
-        episodes = [episode for episode in group["episodes"] if is_german_review_candidate(episode) and not has_german_track(episode)]
+        episodes = [episode for episode in group["episodes"] if is_german_review_candidate(episode) and not episode.get("pending") and not has_german_track(episode)]
         if episodes:
             missing_german_series.append({**group, "episodes": episodes})
     series_categories = [