feat: add dailylogin feature

scripts/ui/daily_reward_config_panel.gd

@@ -0,0 +1,51 @@
+extends Control
+
+@onready var close_btn = %CloseBtn
+@onready var save_btn = %SaveBtn
+@onready var status_lbl = %StatusLabel
+@onready var text_edit = %TextEdit
+
+func _ready():
+	close_btn.pressed.connect(func(): queue_free())
+	save_btn.pressed.connect(_on_save)
+	_load_config()
+	
+func _load_config():
+	if not NakamaManager.session:
+		status_lbl.text = "Not authenticated"
+		return
+	status_lbl.text = "Loading..."
+	var res = await NakamaManager.client.rpc_async(NakamaManager.session, "get_daily_reward_config_admin", "{}")
+	if res.is_exception():
+		status_lbl.text = "Error: " + res.get_exception().message
+		return
+		
+	var json = JSON.new()
+	if json.parse(res.payload) == OK:
+		var config = json.get_data().get("config", {})
+		if config.is_empty():
+			# generate default 12 months for 2026/2027
+			var year = 2026
+			for m in range(1, 13):
+				var m_str = "%d-%02d" % [year, m]
+				var arr = []
+				for d in range(30):
+					arr.append(min(10 + d*5, 100)) # Reward is star currency, max 100
+				config[m_str] = arr
+		
+		text_edit.text = JSON.stringify(config, "\t")
+		status_lbl.text = "Loaded"
+
+func _on_save():
+	var json = JSON.new()
+	if json.parse(text_edit.text) != OK:
+		status_lbl.text = "Invalid JSON syntax. Please check your formatting."
+		return
+		
+	status_lbl.text = "Saving..."
+	var req = { "config": json.get_data() }
+	var res = await NakamaManager.client.rpc_async(NakamaManager.session, "set_daily_reward_config", JSON.stringify(req))
+	if res.is_exception():
+		status_lbl.text = "Save error: " + res.get_exception().message
+	else:
+		status_lbl.text = "Config saved successfully!"