chore: rename last local feed refresh time variable name for clarity

Author: Bnyro

app/src/main/java/com/github/libretube/constants/PreferenceKeys.kt

@@ -112,7 +112,7 @@ object PreferenceKeys {
     const val SELECTED_FEED_FILTERS = "filter_feed"
     const val FEED_SORT_ORDER = "sort_oder_feed"
     const val LOCAL_FEED_EXTRACTION = "local_feed_extraction"
-    const val LAST_FEED_REFRESH_TIMESTAMP_MILLIS = "last_feed_refresh_timestamp_millis"
+    const val LAST_LOCAL_FEED_REFRESH_TIMESTAMP_MILLIS = "last_feed_refresh_timestamp_millis"
 
     // Advanced
     const val AUTOMATIC_UPDATE_CHECKS = "automatic_update_checks"

app/src/main/java/com/github/libretube/repo/LocalFeedRepository.kt

@@ -60,7 +60,7 @@ class LocalFeedRepository : FeedRepository {
 
             // only refresh if feed is empty or last refresh was more than a day ago
             val lastRefreshMillis =
-                PreferenceHelper.getLong(PreferenceKeys.LAST_FEED_REFRESH_TIMESTAMP_MILLIS, 0)
+                PreferenceHelper.getLong(PreferenceKeys.LAST_LOCAL_FEED_REFRESH_TIMESTAMP_MILLIS, 0)
             if (feed.isNotEmpty() && lastRefreshMillis > oneDayAgo) {
                 return DatabaseHolder.Database.feedDao().getAll()
                     .map(SubscriptionsFeedItem::toStreamItem)
@@ -69,7 +69,7 @@ class LocalFeedRepository : FeedRepository {
 
         DatabaseHolder.Database.feedDao().cleanUpOlderThan(minimumDateMillis)
         refreshFeed(channelIds, minimumDateMillis, onProgressUpdate)
-        PreferenceHelper.putLong(PreferenceKeys.LAST_FEED_REFRESH_TIMESTAMP_MILLIS, nowMillis)
+        PreferenceHelper.putLong(PreferenceKeys.LAST_LOCAL_FEED_REFRESH_TIMESTAMP_MILLIS, nowMillis)
 
         return DatabaseHolder.Database.feedDao().getAll().map(SubscriptionsFeedItem::toStreamItem)
     }