支持统一版本回退与重复提交

以 projectVersion 作为唯一用户版本标签，允许同版本重复提交和版本回退。

按 versionId 保持提交实例不可变，取消同版本旧 pending 提交并按最近提交排序。

server-rs/crates/spacetime-module/src/game_distribution.rs

@@ -1990,6 +1990,24 @@ fn create_game_distribution_version_tx(
     let version_number =
         resolve_game_distribution_version_number(max_existing_version, input.version_number)?;
     let now = Timestamp::from_micros_since_unix_epoch(input.now_micros);
+    for mut pending in ctx
+        .db
+        .game_distribution_version()
+        .by_game_distribution_version_game_id()
+        .filter(&game_id)
+        .filter(|version| {
+            version.version_number == version_number
+                && version.status == GAME_DISTRIBUTION_VERSION_PENDING_REVIEW
+        })
+    {
+        pending.status = GAME_DISTRIBUTION_VERSION_CANCELLED.to_string();
+        pending.review_reason = Some("被同一项目版本的新提交替代".to_string());
+        pending.updated_at = now;
+        ctx.db
+            .game_distribution_version()
+            .version_id()
+            .update(pending);
+    }
     ctx.db
         .game_distribution_version()
         .insert(GameDistributionVersion {
@@ -2855,8 +2873,8 @@ fn restore_game_distribution_game_tx(
         .collect::<Vec<_>>();
     candidates.sort_by(|left, right| {
         right
-            .version_number
-            .cmp(&left.version_number)
+            .updated_at
+            .cmp(&left.updated_at)
             .then_with(|| right.version_id.cmp(&left.version_id))
     });
     let mut version = candidates
@@ -3189,8 +3207,8 @@ fn admin_game_distribution_game_snapshot(
     let version_count = versions.len() as u64;
     versions.sort_by(|left, right| {
         right
-            .version_number
-            .cmp(&left.version_number)
+            .updated_at
+            .cmp(&left.updated_at)
             .then_with(|| right.version_id.cmp(&left.version_id))
     });
     versions.truncate(GAME_DISTRIBUTION_ADMIN_VERSION_HISTORY_LIMIT);
@@ -3347,8 +3365,8 @@ fn list_owner_game_distribution_games_tx(
                 .collect::<Vec<_>>();
             versions.sort_by(|left, right| {
                 right
-                    .version_number
-                    .cmp(&left.version_number)
+                    .updated_at
+                    .cmp(&left.updated_at)
                     .then_with(|| right.version_id.cmp(&left.version_id))
             });
             versions.truncate(GAME_DISTRIBUTION_MAX_OWNER_VERSIONS_PER_GAME);