feat: expand progression and multiplayer systems

Add named save slots, progression import/export, and a unified play flow. Add live friend requests, presence, invitations, and relationship controls without durable discovery-server social storage. Advance the network protocol with isolated channels, movement reconciliation, late-join recovery, fishing replication, and animation synchronization. Preserve per-species catch totals, refine generated-world startup and water recovery, and complete the related input and interface improvements.

collection/collection_log.gd

@@ -6,9 +6,11 @@ signal fish_quality_discovered(fish_id: StringName, quality: int)
 signal collection_changed
 
 const FishQualityType = preload("res://fish/fish_quality.gd")
+const MAX_CATCH_COUNT: int = 1000000000
 
 var _discovered: Dictionary[StringName, bool] = {}
 var _quality_masks: Dictionary[StringName, int] = {}
+var _catch_counts: Dictionary[StringName, int] = {}
 
 
 func has_discovered(fish_id: StringName) -> bool:
@@ -41,6 +43,26 @@ func mark_quality_discovered(fish_id: StringName, quality: int) -> void:
 	collection_changed.emit()
 
 
+func record_catch(fish_id: StringName, quality: int) -> void:
+	if fish_id.is_empty() or not FishQualityType.is_valid(quality):
+		return
+	var species_was_discovered: bool = has_discovered(fish_id)
+	if not species_was_discovered:
+		_discovered[fish_id] = true
+	var previous_mask: int = _quality_masks.get(fish_id, 0)
+	var next_mask: int = previous_mask | FishQualityType.bit_for(quality)
+	_quality_masks[fish_id] = next_mask
+	_catch_counts[fish_id] = mini(
+		int(_catch_counts.get(fish_id, 0)) + 1,
+		MAX_CATCH_COUNT,
+	)
+	if not species_was_discovered:
+		fish_discovered.emit(fish_id)
+	if next_mask != previous_mask:
+		fish_quality_discovered.emit(fish_id, quality)
+	collection_changed.emit()
+
+
 func get_discovered_ids() -> Array[StringName]:
 	var discovered_ids: Array[StringName] = []
 	for fish_id: StringName in _discovered:
@@ -65,6 +87,14 @@ func get_discovered_quality_masks() -> Dictionary[StringName, int]:
 	return _quality_masks.duplicate()
 
 
+func get_catch_count(fish_id: StringName) -> int:
+	return _catch_counts.get(fish_id, 0) if has_discovered(fish_id) else 0
+
+
+func get_catch_counts() -> Dictionary[StringName, int]:
+	return _catch_counts.duplicate()
+
+
 func has_mastered(fish_id: StringName) -> bool:
 	return get_quality_mask(fish_id) == FishQualityType.ALL_TIERS_MASK
 
@@ -77,6 +107,22 @@ func replace_discovered_ids(fish_ids: Array[StringName]) -> bool:
 func replace_discovery_state(
 	fish_ids: Array[StringName],
 	quality_masks: Dictionary[StringName, int],
+) -> bool:
+	var preserved_counts: Dictionary[StringName, int] = {}
+	for fish_id: StringName in fish_ids:
+		if _catch_counts.has(fish_id):
+			preserved_counts[fish_id] = _catch_counts[fish_id]
+	return replace_collection_state(
+		fish_ids,
+		quality_masks,
+		preserved_counts,
+	)
+
+
+func replace_collection_state(
+	fish_ids: Array[StringName],
+	quality_masks: Dictionary[StringName, int],
+	catch_counts: Dictionary[StringName, int],
 ) -> bool:
 	var replacement: Dictionary[StringName, bool] = {}
 	for fish_id: StringName in fish_ids:
@@ -95,7 +141,19 @@ func replace_discovery_state(
 			return false
 		if mask != 0:
 			replacement_masks[fish_id] = mask
+	var replacement_counts: Dictionary[StringName, int] = {}
+	for fish_id: StringName in catch_counts:
+		var count: int = catch_counts[fish_id]
+		if (
+			fish_id.is_empty()
+			or not replacement.has(fish_id)
+			or count <= 0
+			or count > MAX_CATCH_COUNT
+		):
+			return false
+		replacement_counts[fish_id] = count
 	_discovered = replacement
 	_quality_masks = replacement_masks
+	_catch_counts = replacement_counts
 	collection_changed.emit()
 	return true