fix: correct year and date for "Heimweh" by Freddy Quinn and clarify metadata handling in track processing

data/hitster_default/years.json

@@ -745,8 +745,8 @@
       "mbid": null
     },
     "Freddy Quinn - Heimweh (Dort wo die Blumen blüh'n).opus": {
-      "year": 2006,
+      "year": 1956,
-      "date": "2006-10-26",
+      "date": "1956",
       "title": "Heimweh (Dort wo die Blumen blüh'n)",
       "artist": "Freddy Quinn",
       "mbid": "2e4c3d92-9103-48ee-9399-43d83a61872f"

src/server/game/deck.js

@@ -91,13 +91,14 @@ export async function loadDeck(playlistId = 'default') {
         let title = jsonMeta?.title ?? path.parse(f).name;
         let artist = jsonMeta?.artist ?? '';
 
-        // Only parse audio file if JSON doesn't have complete metadata
+        // Only parse audio file if JSON doesn't have title or artist metadata
+        // Note: year is ONLY taken from years.json, never from audio file
         if (!jsonMeta || !jsonMeta.title || !jsonMeta.artist) {
           try {
             const meta = await mmParseFile(fp, { duration: false });
             title = jsonMeta?.title || meta.common.title || title;
             artist = jsonMeta?.artist || meta.common.artist || artist;
-            year = jsonMeta?.year ?? meta.common.year ?? year;
+            // year remains from years.json only - do not use meta.common.year
           } catch (err) {
             // Log error but continue processing
             console.warn(`Failed to parse metadata for ${f}:`, err.message);

src/server/tracks.js

@@ -37,13 +37,14 @@ export async function listTracks(playlistId = 'default') {
       let title = jsonMeta?.title ?? path.parse(f).name;
       let artist = jsonMeta?.artist ?? '';
 
-      // Only parse audio file if JSON doesn't have complete metadata
+      // Only parse audio file if JSON doesn't have title or artist metadata
+      // Note: year is ONLY taken from years.json, never from audio file
       if (!jsonMeta || !jsonMeta.title || !jsonMeta.artist) {
         try {
           const meta = await mmParseFile(fp, { duration: false });
           title = jsonMeta?.title || meta.common.title || title;
           artist = jsonMeta?.artist || meta.common.artist || artist;
-          year = jsonMeta?.year ?? meta.common.year ?? year;
+          // year remains from years.json only - do not use meta.common.year
         } catch {}
       }