feat(scene): implement saving for scene component

Keep in mind that the movement itself isn't acknowledged by the server yet.
However, teleport transitions are now persistent.

gamesv/src/logic/event/kinds.zig

@@ -2,6 +2,8 @@ pub const Login = struct {};
 
 pub const ChangeSceneBegin = struct {};
 
+pub const CurrentSceneModified = struct {};
+
 pub const CharBagTeamModified = struct {
     team_index: usize,
     modification: enum {

gamesv/src/logic/messaging/map_mark.zig

@@ -11,6 +11,7 @@ pub fn onSceneSetTrackPoint(
     assets: *const Assets,
     scene: Player.Component(.scene),
     change_scene_tx: logic.event.Sender(.change_scene_begin),
+    cur_scene_modified_tx: logic.event.Sender(.current_scene_modified),
 ) !void {
     const log = std.log.scoped(.scene_set_track_point);
 
@@ -45,6 +46,7 @@ pub fn onSceneSetTrackPoint(
         validation_config.position.z,
     };
 
+    try cur_scene_modified_tx.send(.{});
     try change_scene_tx.send(.{});
 
     log.info(

gamesv/src/logic/systems/player_saves.zig

@@ -36,3 +36,31 @@ pub fn saveCharBagTeams(
         },
     };
 }
+
+pub fn saveCurrentScene(
+    _: logic.event.Receiver(.current_scene_modified),
+    scene: Player.Component(.scene),
+    player_id: logic.World.PlayerId,
+    io: Io,
+) !void {
+    const data_dir = fs.persistence.openPlayerDataDir(io, player_id.uid.view()) catch |err| switch (err) {
+        error.Canceled => |e| return e,
+        else => |e| {
+            log.err(
+                "failed to open data dir for player with uid {s}: {t}",
+                .{ player_id.uid.view(), e },
+            );
+            return;
+        },
+    };
+
+    defer data_dir.close(io);
+
+    fs.persistence.saveSceneComponent(io, data_dir, scene.data) catch |err| switch (err) {
+        error.Canceled => |e| return e,
+        else => |e| {
+            log.err("save failed: {t}", .{e});
+            return;
+        },
+    };
+}