feat: implement console logger with backend integration and file logging

logger.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"log"
 	"os"
 	"path/filepath"
@@ -10,7 +11,47 @@ import (
 	"time"
 )
 
-var logger = log.New(os.Stdout, "", 0)
+var (
+	logger  = log.New(os.Stdout, "", 0)
+	logFile *os.File
+)
+
+// InitLogger initializes the logger to write to both stdout and a file in AppData
+func InitLogger() error {
+	configDir, err := os.UserConfigDir()
+	if err != nil {
+		return err
+	}
+
+	appDir := filepath.Join(configDir, "EMLy")
+	logsDir := filepath.Join(appDir, "logs")
+
+	if err := os.MkdirAll(logsDir, 0755); err != nil {
+		return err
+	}
+
+	logPath := filepath.Join(logsDir, "app.log")
+	// Open file in Append mode
+	file, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	logFile = file
+
+	// MultiWriter to write to both stdout and file
+	multi := io.MultiWriter(os.Stdout, file)
+	logger = log.New(multi, "", 0)
+
+	Log("Logger initialized. Writing to: " + logPath)
+	return nil
+}
+
+// CloseLogger closes the log file
+func CloseLogger() {
+	if logFile != nil {
+		logFile.Close()
+	}
+}
 
 // Log prints a timestamped, file:line tagged log line.
 func Log(args ...any) {
@@ -27,3 +68,14 @@ func Log(args ...any) {
 	msg := fmt.Sprintln(args...)
 	logger.Printf("[%s] - [%s] - [%s] - %s", date, tm, loc, strings.TrimRight(msg, "\n"))
 }
+
+// FrontendLog allows the frontend to send logs to the backend logger
+func (a *App) FrontendLog(level string, message string) {
+	now := time.Now()
+	date := now.Format("2006-01-02")
+	tm := now.Format("15:04:05")
+
+	// We don't use runtime.Caller here because it would point to this function
+	// Instead we tag it as [FRONTEND]
+	logger.Printf("[%s] - [%s] - [FRONTEND] - [%s] %s", date, tm, level, message)
+}