fix: Windows service via NSSM (sc.exe incompatible)

Error 1053 — sc.exe alone cannot run non-service-aware .exe.
ntfy-bridge needs NSSM (Non-Sucking Service Manager) wrapper.

- service.v: --install-service uses nssm.exe (auto-detect PATH or dir)
- scripts/install.ps1: auto-downloads NSSM 2.24 before installing
- Falls back to sc.exe for uninstall/status if nssm not found

service.v

@@ -9,22 +9,72 @@ pub fn service_install(config_path string, quiet bool) ! {
 	println('  Config: ${abs_config}')
 
 	$if windows {
-		args := '--quiet --config "${abs_config}"'
 		name := 'ntfy-bridge'
-		cmd := 'sc create ${name} binPath= "${exe_path} ${args}" start= auto DisplayName= "ntfy-bridge Notification Hub"'
-		r := os.execute(cmd)
-		if r.exit_code != 0 {
-			eprintln('sc create failed: ${r.output}')
+		args := '--quiet --config "${abs_config}"'
+
+		// Find nssm
+		mut nssm_exe := ''
+		dir := os.dir(exe_path)
+		candidate := os.join_path(dir, 'nssm.exe')
+		if os.exists(candidate) {
+			nssm_exe = candidate
+		} else {
+			r := os.execute('where nssm 2>nul')
+			if r.exit_code == 0 && r.output.contains('nssm') {
+				nssm_exe = 'nssm'
+			}
+		}
+
+		if nssm_exe == '' {
+			eprintln('nssm.exe not found. Windows requires NSSM to run ntfy-bridge as a service.')
+			eprintln('')
+			eprintln('Install NSSM (Non-Sucking Service Manager):')
+			eprintln('  scoop install nssm')
+			eprintln('  OR download from https://nssm.cc/download')
+			eprintln('  OR place nssm.exe next to ntfy-bridge.exe')
 			exit(1)
 		}
-		println('  Service created.')
-		os.execute('sc failure ${name} reset= 86400 actions= restart/10000/restart/30000/restart/60000')
-		os.execute('sc description ${name} "Homelab notification hub"')
-		r2 := os.execute('sc start ${name}')
-		if r2.exit_code != 0 {
-			println('  Warning: sc start ${name} manually.')
+		println('  Using nssm: ${nssm_exe}')
+
+		// Remove previous install if exists
+		os.execute('"${nssm_exe}" stop ${name}')
+		os.execute('"${nssm_exe}" remove ${name} confirm')
+
+		// Install the service
+		r := os.execute('"${nssm_exe}" install ${name} "${exe_path}" ${args}')
+		if r.exit_code != 0 {
+			eprintln('nssm install failed: ${r.output}')
+			exit(1)
 		}
-		println('  Service started. sc start|stop|query|delete ${name}')
+		println('  Service registered.')
+
+		// Configure service
+		os.execute('"${nssm_exe}" set ${name} AppStdout C:\\ProgramData\\ntfy-bridge\\service.log')
+		os.execute('"${nssm_exe}" set ${name} AppStderr C:\\ProgramData\\ntfy-bridge\\service.log')
+		os.execute('"${nssm_exe}" set ${name} AppRotateFiles 1')
+		os.execute('"${nssm_exe}" set ${name} AppRotateSeconds 86400')
+		os.execute('"${nssm_exe}" set ${name} AppRotateBytes 1048576')
+		os.execute('"${nssm_exe}" set ${name} DisplayName "ntfy-bridge Notification Hub"')
+		os.execute('"${nssm_exe}" set ${name} Description "Homelab notification hub"')
+		os.execute('"${nssm_exe}" set ${name} Start SERVICE_AUTO_START')
+
+		// Create log directory
+		os.mkdir_all('C:\\ProgramData\\ntfy-bridge') or {}
+
+		// Start the service
+		r2 := os.execute('"${nssm_exe}" start ${name}')
+		if r2.exit_code != 0 {
+			println('  Warning: nssm start ${name} failed — start manually.')
+		} else {
+			println('  Service started successfully.')
+		}
+		println('')
+		println('Service commands:')
+		println('  nssm status ${name}')
+		println('  nssm start ${name}')
+		println('  nssm stop ${name}')
+		println('  nssm restart ${name}')
+		println('  nssm remove ${name} confirm  (uninstall)')
 		return
 	}
 	$if linux {
@@ -102,10 +152,32 @@ pub fn service_uninstall() ! {
 
 	$if windows {
 		name := 'ntfy-bridge'
-		os.execute('sc stop ${name}')
-		r := os.execute('sc delete ${name}')
-		if r.exit_code != 0 {
-			return error('sc delete failed: ${r.output}')
+		// Find nssm
+		exe_path := os.executable()
+		mut nssm_exe := ''
+		dir := os.dir(exe_path)
+		candidate := os.join_path(dir, 'nssm.exe')
+		if os.exists(candidate) {
+			nssm_exe = candidate
+		} else {
+			r := os.execute('where nssm 2>nul')
+			if r.exit_code == 0 && r.output.contains('nssm') {
+				nssm_exe = 'nssm'
+			}
+		}
+
+		if nssm_exe != '' {
+			os.execute('"${nssm_exe}" stop ${name}')
+			r := os.execute('"${nssm_exe}" remove ${name} confirm')
+			if r.exit_code != 0 {
+				return error('nssm remove failed: ${r.output}')
+			}
+		} else {
+			os.execute('sc stop ${name}')
+			r := os.execute('sc delete ${name}')
+			if r.exit_code != 0 {
+				return error('sc delete failed: ${r.output}')
+			}
 		}
 		println('  Service uninstalled.')
 		return
@@ -142,8 +214,27 @@ pub fn service_uninstall() ! {
 
 pub fn service_status() ! {
 	$if windows {
-		r := os.execute('sc query ntfy-bridge')
-		if r.exit_code == 0 { println(r.output) } else { println('Not installed.') }
+		// Find nssm
+		exe_path := os.executable()
+		mut nssm_exe := ''
+		dir := os.dir(exe_path)
+		candidate := os.join_path(dir, 'nssm.exe')
+		if os.exists(candidate) {
+			nssm_exe = candidate
+		} else {
+			r := os.execute('where nssm 2>nul')
+			if r.exit_code == 0 && r.output.contains('nssm') {
+				nssm_exe = 'nssm'
+			}
+		}
+
+		if nssm_exe != '' {
+			r := os.execute('"${nssm_exe}" status ntfy-bridge')
+			if r.exit_code == 0 { println(r.output) } else { println('Not installed.') }
+		} else {
+			r := os.execute('sc query ntfy-bridge')
+			if r.exit_code == 0 { println(r.output) } else { println('Not installed.') }
+		}
 		return
 	}
 	$if linux {