feat: add Wine Z: path prefix for Windows platform on Linux host

- Add winePath helper that prepends Z: when platform is windows on Linux
- Thread platform through buildModPath, buildAutoArgs, and Start()
- Apply Z: prefix to -config=, -mod=, -profiles=, and %command% binary paths
- Add tests for winePath, buildAutoArgs, and buildModPath with platform param
- Fix formatting across services package with gofmt
- Include all prior bug fixes from this branch

backend/internal/api/router.go

@@ -7,18 +7,19 @@ import (
 )
 
 type Handler struct {
-	settings      *services.SettingsManager
-	configs       *services.ConfigManager
-	modlists      *services.ModlistManager
-	process       *services.ProcessManager
-	steamcmd      *services.SteamCmdManager
-	scheduler     *services.Scheduler
-	streamer      *services.LogStreamer
-	dataDir       string
-	serverfileDir string
-	modsDir       string
-	cfgDir        string
-	profilesDir   string
+	settings       *services.SettingsManager
+	configs        *services.ConfigManager
+	modlists       *services.ModlistManager
+	process        *services.ProcessManager
+	steamcmd       *services.SteamCmdManager
+	scheduler      *services.Scheduler
+	streamer       *services.LogStreamer
+	dataDir        string
+	serverfileDir  string
+	modsDir        string
+	cfgDir         string
+	profilesDir    string
+	frontendServed bool
 }
 
 func New(
@@ -30,20 +31,22 @@ func New(
 	scheduler *services.Scheduler,
 	streamer *services.LogStreamer,
 	dataDir, serverfileDir, modsDir, cfgDir, profilesDir string,
+	frontendServed bool,
 ) *Handler {
 	return &Handler{
-		settings:      settings,
-		configs:       configs,
-		modlists:      modlists,
-		process:       process,
-		steamcmd:      steamcmd,
-		scheduler:     scheduler,
-		streamer:      streamer,
-		dataDir:       dataDir,
-		serverfileDir: serverfileDir,
-		modsDir:       modsDir,
-		cfgDir:        cfgDir,
-		profilesDir:   profilesDir,
+		settings:       settings,
+		configs:        configs,
+		modlists:       modlists,
+		process:        process,
+		steamcmd:       steamcmd,
+		scheduler:      scheduler,
+		streamer:       streamer,
+		dataDir:        dataDir,
+		serverfileDir:  serverfileDir,
+		modsDir:        modsDir,
+		cfgDir:         cfgDir,
+		profilesDir:    profilesDir,
+		frontendServed: frontendServed,
 	}
 }