不跟系统的暗黑模式，保持light模式；增加本地日志的读取；接入firebase

AIGrammar/ViewModel/Config.swift

@@ -88,3 +88,20 @@ class GlobalEnvironment: ObservableObject {
 
 // 全局实例
 let globalEnvironment = GlobalEnvironment()		
+
+
+class GlobalAnalyticsEvents: ObservableObject {
+    let eventPurchase = "purchase"
+    let eventEnterPurchase = "enter_purchase_page"
+    
+    let keyPurchaseEntry = "purchase_entry_point"
+    let keyPurchaseItem = "purchase_product_id"
+    let keyDeviceID = "device_id"
+    
+    let valEntryBuyProBtn = "buy_pro_btn"
+    let valEntrySettingsBtn = "settings_buy_btn"
+}
+
+let globalAnalyticsEvents = GlobalAnalyticsEvents()
+
+