Gate READY on download completion; move audio to ~/.radiantwave/audio

State machine now uses DOWNLOADING_ASSETS before READY. Downloads closing
the DownloadDone channel signals checkState() to proceed. Download failure
sets downloadFailed flag which prevents READY. Audio files moved from
~/.local/share/rhemawave/audio to ~/.radiantwave/audio/.

Regression tests in application_test.go (linux build-tagged due to
network package D-Bus init). Version 0.6.

internal/application/application.go

@@ -45,14 +45,16 @@ const (
 )
 
 type Application struct {
-	Window        *sdl.Window
-	License       *license.Response
-	pageStack     []page.Page
-	pendingAction func()
-	running       bool
-	DB            *gorm.DB
-	PageRouter    *page.Router
-	state         State
+	Window             *sdl.Window
+	License            *license.Response
+	pageStack          []page.Page
+	pendingAction      func()
+	running            bool
+	DB                 *gorm.DB
+	PageRouter         *page.Router
+	state              State
+	downloadsComplete  bool
+	downloadFailed     bool
 }
 
 var lastNetworkCheckTime time.Time
@@ -153,12 +155,14 @@ func Run() {
 	app.initializeAudio()
 	// Create a buffered channel so log writes don't slow down downloads.
 	downloadProgressChan := make(chan download.DownloadStatus, 1000)
+	downloadDone := make(chan struct{})
 
 	app.PageRouter = page.NewRouter(page.PageCtx{
 		DbPtr:          app.DB,
 		W:              w,
 		H:              h,
 		MessageChannel: downloadProgressChan,
+		DownloadDone:   downloadDone,
 	})
 
 	// Sync the proclamations from the API to the Database
@@ -183,16 +187,11 @@ func Run() {
 	// 	"PinealGland.wav",
 	// }
 
-	config, err := db.GetConfig(app.DB)
-	if err != nil {
-		panic(err)
-	}
-
-	audioDir := filepath.Join(config.AssetsDir, "audio")
+	audioDir := filepath.Join(homeDir, ".radiantwave", "audio")
 
 	_, err = os.Stat(audioDir)
 	if os.IsNotExist(err) {
-		if err = os.MkdirAll(audioDir, 0740); err != nil {
+		if err = os.MkdirAll(audioDir, 0755); err != nil {
 			logger.Error("unable to create audio directory: %v", err)
 		}
 	}
@@ -203,13 +202,22 @@ func Run() {
 }
 
 // checkState keeps watch of the application state and sets pages
-// accordingly. This function runs once per
+// accordingly. This function runs once per frame.
 func (app *Application) checkState() {
 	// app.state is READY so do nothing.
 	if app.state == READY {
 		return
 	}
 
+	// Check if downloads have finished (non-blocking)
+	if !app.downloadsComplete {
+		select {
+		case <-app.PageRouter.Context.DownloadDone:
+			app.downloadsComplete = true
+		default:
+		}
+	}
+
 	// Check if there is an internet connection, and if not, force the WiFi page
 	if !networkIsUp {
 		if lastNetworkCheckTime.IsZero() || time.Since(lastNetworkCheckTime) >= time.Second {
@@ -264,6 +272,15 @@ func (app *Application) checkState() {
 		return
 	}
 
+	// All config prerequisites met — now wait for downloads to finish
+	if !app.downloadsComplete {
+		if app.state != DOWNLOADING_ASSETS {
+			app.state = DOWNLOADING_ASSETS
+			app.PageRouter.NavigateTo(page.HOME)
+		}
+		return
+	}
+
 	app.state = READY
 	app.PageRouter.NavigateTo(page.HOME)
 }
@@ -494,7 +511,7 @@ func (app *Application) initKeybinds() {
 	})
 
 	keybinds.Register(sdl.K_F1, sdl.KMOD_NONE, func() {
-		if app.state != READY {
+		if app.state != READY && app.state != DOWNLOADING_ASSETS {
 			return
 		}
 		app.PageRouter.NavigateTo(page.HOME)