feat(build): add build scripts for Linux and Windows with commit hash and build time

.gitignore

@@ -1,6 +1,7 @@
 /.claude
 agent.md
 config.json
+*.exe
 
 # SQLite database files. They live on a network share (Y:), and git/cloud
 # sync touching them while a WAL database is open corrupts the WAL index and

build-linux-x86_64.bat

@@ -0,0 +1,33 @@
+@echo off
+setlocal enabledelayedexpansion
+
+echo Building for Linux (amd64)...
+
+:: Get git commit hash (shortened to 7 characters, can also use full)
+for /f %%i in ('git rev-parse --short HEAD') do set COMMIT=%%i
+
+:: Get UTC time
+for /f %%i in ('powershell -Command "Get-Date -Format 'yyyy-MM-ddTHH:mm:ssZ'"') do set BUILD_DATE=%%i
+
+:: Set environment variables for Linux build
+set GOOS=linux
+set GOARCH=amd64
+set CGO_ENABLED=0
+
+:: Build -ldflags
+set LDFLAGS=-X main.BuildTime=%BUILD_DATE% -X main.CommitHash=%COMMIT%
+
+:: Set output file name
+set OUTPUT=nukumizu-linux-amd64
+
+echo Commit: %COMMIT%
+echo BuildDate: %BUILD_DATE%
+echo Output: %OUTPUT%
+
+go build -ldflags "%LDFLAGS%" -o "%OUTPUT%" .
+
+if %errorlevel% equ 0 (
+    echo Build succeeded: %OUTPUT%
+) else (
+    echo Build failed.
+)

build-win-x86_64.bat

@@ -0,0 +1,33 @@
+@echo off
+setlocal enabledelayedexpansion
+
+echo Building for Windows (amd64)...
+
+:: Get git commit hash (shortened to 7 characters, can also use full)
+for /f %%i in ('git rev-parse --short HEAD') do set COMMIT=%%i
+
+:: Get UTC time
+for /f %%i in ('powershell -Command "Get-Date -Format 'yyyy-MM-ddTHH:mm:ssZ'"') do set BUILD_DATE=%%i
+
+:: Set environment variables for Windows build
+set GOOS=windows
+set GOARCH=amd64
+set CGO_ENABLED=0
+
+:: Build -ldflags
+set LDFLAGS=-X main.BuildTime=%BUILD_DATE% -X main.CommitHash=%COMMIT%
+
+:: Set output file name
+set OUTPUT=nukumizu-windows-amd64.exe
+
+echo Commit: %COMMIT%
+echo BuildDate: %BUILD_DATE%
+echo Output: %OUTPUT%
+
+go build -ldflags "%LDFLAGS%" -o "%OUTPUT%" .
+
+if %errorlevel% equ 0 (
+    echo Build succeeded: %OUTPUT%
+) else (
+    echo Build failed.
+)

main.go

@@ -21,14 +21,22 @@ import (
 	"nukumizu-backend/utils"
 )
 
+// CommitHash and BuildTime are set at build time using -ldflags.
+var (
+	CommitHash string
+	BuildTime  string
+)
+
 // SoftwareInfo holds build metadata.
 type SoftwareInfo struct {
 	Name        string
 	Version     string
 	Developer   string
 	BuildVer    int16
+	CommitHash  string
 	Description string
 	BuildType   string
+	BuildTime   string
 }
 
 var softwareInfo = SoftwareInfo{
@@ -36,8 +44,10 @@ var softwareInfo = SoftwareInfo{
 	Version:     "0.1.0",
 	Developer:   "Madobi Nanami",
 	BuildVer:    1,
+	CommitHash:  CommitHash,
 	Description: "Remote server monitoring and command execution subsystem for Komari",
 	BuildType:   "Debug",
+	BuildTime:   BuildTime,
 }
 
 func main() {
@@ -46,7 +56,7 @@ func main() {
 	flag.Parse()
 
 	// Log startup banner.
-	postLog.Info(fmt.Sprintf("%s Ver.%s.%d.%s Developed by %s", softwareInfo.Name, softwareInfo.Version, softwareInfo.BuildVer, softwareInfo.BuildType, softwareInfo.Developer))
+	postLog.Info(fmt.Sprintf("%s Ver.%s.%d.%s.%s Developed by %s at %s", softwareInfo.Name, softwareInfo.Version, softwareInfo.BuildVer, softwareInfo.BuildType, softwareInfo.CommitHash, softwareInfo.Developer, softwareInfo.BuildTime))
 
 	// Load configuration.
 	cfg, err := config.LoadConfig(*configPath)

run.bat

@@ -0,0 +1,12 @@
+@echo off
+setlocal enabledelayedexpansion
+
+:: Get git commit hash (shortened to 7 characters, can also use full)
+for /f %%i in ('git rev-parse --short HEAD') do set COMMIT=%%i
+
+:: Get UTC time
+for /f %%i in ('powershell -Command "Get-Date -Format 'yyyy-MM-ddTHH:mm:ssZ'"') do set BUILD_DATE=%%i
+
+:: Build -ldflags
+set LDFLAGS=-X main.BuildTime=%BUILD_DATE% -X main.CommitHash=%COMMIT%
+go run -ldflags "%LDFLAGS%" .