feat: add comprehensive diagnostic logging subsystem and UI controls

frontend/bindings/g-launcher/internal/fs-service/fsservice.js

@@ -39,6 +39,14 @@ export function GetDir(path) {
     return $Call.ByID(1567262998, path);
 }
 
+/**
+ * GetLogFilePath returns the absolute path of launcher.log
+ * @returns {$CancellablePromise<string>}
+ */
+export function GetLogFilePath() {
+    return $Call.ByID(4150210098);
+}
+
 /**
  * @returns {$CancellablePromise<[string, string]>}
  */
@@ -54,6 +62,16 @@ export function Join(...paths) {
     return $Call.ByID(3036412633, paths);
 }
 
+/**
+ * LogMessage receives log entries from the frontend and appends them to launcher.log
+ * @param {string} level
+ * @param {string} message
+ * @returns {$CancellablePromise<void>}
+ */
+export function LogMessage(level, message) {
+    return $Call.ByID(4279191144, level, message);
+}
+
 /**
  * @param {string} path
  * @returns {$CancellablePromise<[boolean, string]>}
@@ -62,6 +80,14 @@ export function OpenFolder(path) {
     return $Call.ByID(1601714793, path);
 }
 
+/**
+ * OpenLogsFolder opens the folder containing launcher.log in Windows File Explorer
+ * @returns {$CancellablePromise<[boolean, string]>}
+ */
+export function OpenLogsFolder() {
+    return $Call.ByID(2156513786);
+}
+
 /**
  * @param {string} filter
  * @returns {$CancellablePromise<string>}
@@ -86,6 +112,15 @@ export function ReadConfigFile(gameDir, fileName) {
     return $Call.ByID(3834168665, gameDir, fileName);
 }
 
+/**
+ * ReadLogs returns the last maxLines of the log file
+ * @param {number} maxLines
+ * @returns {$CancellablePromise<string>}
+ */
+export function ReadLogs(maxLines) {
+    return $Call.ByID(2698372806, maxLines);
+}
+
 /**
  * @param {string} path
  * @returns {$CancellablePromise<void>}