fix(mobile): Deduplicate assets in person view timeline (#26723)

fix(mobile): deduplicate assets in person view timeline

Previously, assets with multiple face records for the same person (e.g.,
manual Digikam imports and Immich ML detections) appeared multiple times
in the person timeline. This was caused by an inner join on the
assetFaceEntity without proper deduplication.

This commit refactors the timeline queries to use a subquery approach
instead of joins and grouping. This ensures:

- _getPersonBucketAssets: Only unique assets are fetched, even if
  multiple face records exist for a single asset.
- _watchPersonBucket: Asset counts in timeline headers are accurate
  and represent unique assets.
- Performance: Database overhead is reduced by avoiding complex joins
  and explicit groupBy operations on large result sets.

Signed-off-by: thowdev <12428285+thowdev@users.noreply.github.com>

mobile/lib/infrastructure/repositories/timeline.repository.dart

@@ -424,23 +424,22 @@ class DriftTimelineRepository extends DriftDatabaseRepository {
   }
 
   Stream<List<Bucket>> _watchPersonBucket(String userId, String personId, {GroupAssetsBy groupBy = GroupAssetsBy.day}) {
+    final idQuery = _db.assetFaceEntity.selectOnly()
+      ..addColumns([_db.assetFaceEntity.assetId])
+      ..where(
+        _db.assetFaceEntity.personId.equals(personId) &
+            _db.assetFaceEntity.isVisible.equals(true) &
+            _db.assetFaceEntity.deletedAt.isNull(),
+      );
+
     if (groupBy == GroupAssetsBy.none) {
       final query = _db.remoteAssetEntity.selectOnly()
         ..addColumns([_db.remoteAssetEntity.id.count()])
-        ..join([
-          innerJoin(
-            _db.assetFaceEntity,
-            _db.assetFaceEntity.assetId.equalsExp(_db.remoteAssetEntity.id),
-            useColumns: false,
-          ),
-        ])
         ..where(
-          _db.remoteAssetEntity.deletedAt.isNull() &
+          _db.remoteAssetEntity.id.isInQuery(idQuery) &
+              _db.remoteAssetEntity.deletedAt.isNull() &
               _db.remoteAssetEntity.ownerId.equals(userId) &
-              _db.remoteAssetEntity.visibility.equalsValue(AssetVisibility.timeline) &
-              _db.assetFaceEntity.personId.equals(personId) &
-              _db.assetFaceEntity.isVisible.equals(true) &
-              _db.assetFaceEntity.deletedAt.isNull(),
+              _db.remoteAssetEntity.visibility.equalsValue(AssetVisibility.timeline),
         );
 
       return query.map((row) {
@@ -454,20 +453,11 @@ class DriftTimelineRepository extends DriftDatabaseRepository {
 
     final query = _db.remoteAssetEntity.selectOnly()
       ..addColumns([assetCountExp, dateExp])
-      ..join([
-        innerJoin(
-          _db.assetFaceEntity,
-          _db.assetFaceEntity.assetId.equalsExp(_db.remoteAssetEntity.id),
-          useColumns: false,
-        ),
-      ])
       ..where(
-        _db.remoteAssetEntity.deletedAt.isNull() &
+        _db.remoteAssetEntity.id.isInQuery(idQuery) &
             _db.remoteAssetEntity.ownerId.equals(userId) &
             _db.remoteAssetEntity.visibility.equalsValue(AssetVisibility.timeline) &
-            _db.assetFaceEntity.personId.equals(personId) &
-            _db.assetFaceEntity.isVisible.equals(true) &
-            _db.assetFaceEntity.deletedAt.isNull(),
+            _db.remoteAssetEntity.deletedAt.isNull(),
       )
       ..groupBy([dateExp])
       ..orderBy([OrderingTerm.desc(dateExp)]);
@@ -485,26 +475,26 @@ class DriftTimelineRepository extends DriftDatabaseRepository {
     required int offset,
     required int count,
   }) {
-    final query =
-        _db.remoteAssetEntity.select().join([
-            innerJoin(
-              _db.assetFaceEntity,
-              _db.assetFaceEntity.assetId.equalsExp(_db.remoteAssetEntity.id),
-              useColumns: false,
-            ),
-          ])
-          ..where(
-            _db.remoteAssetEntity.deletedAt.isNull() &
-                _db.remoteAssetEntity.ownerId.equals(userId) &
-                _db.remoteAssetEntity.visibility.equalsValue(AssetVisibility.timeline) &
-                _db.assetFaceEntity.personId.equals(personId) &
-                _db.assetFaceEntity.isVisible.equals(true) &
-                _db.assetFaceEntity.deletedAt.isNull(),
-          )
-          ..orderBy([OrderingTerm.desc(_db.remoteAssetEntity.createdAt)])
-          ..limit(count, offset: offset);
+    final idQuery = _db.assetFaceEntity.selectOnly()
+      ..addColumns([_db.assetFaceEntity.assetId])
+      ..where(
+        _db.assetFaceEntity.personId.equals(personId) &
+            _db.assetFaceEntity.isVisible.equals(true) &
+            _db.assetFaceEntity.deletedAt.isNull(),
+      );
 
-    return query.map((row) => row.readTable(_db.remoteAssetEntity).toDto()).get();
+    final query = _db.remoteAssetEntity.select()
+      ..where(
+        (row) =>
+            row.id.isInQuery(idQuery) &
+            row.deletedAt.isNull() &
+            row.ownerId.equals(userId) &
+            row.visibility.equalsValue(AssetVisibility.timeline),
+      )
+      ..orderBy([(row) => OrderingTerm.desc(row.createdAt)])
+      ..limit(count, offset: offset);
+
+    return query.map((row) => row.toDto()).get();
   }
 
   TimelineQuery map(List<String> userIds, TimelineMapOptions options, GroupAssetsBy groupBy) => (