Add platform-specific implementations for assets, audio, WebSocket, and rendering on Desktop and WebAssembly platforms. Introduce embedded assets for WebAssembly and native file handling for Desktop. Add platform-specific chunk loading and game state synchronization.

cmd/client/assets_wasm.go

@@ -0,0 +1,53 @@
+//go:build wasm
+// +build wasm
+
+package main
+
+import (
+	_ "embed"
+	"encoding/json"
+	"fmt"
+	"log"
+	"path/filepath"
+
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
+
+	"git.zb-server.de/ZB-Server/EscapeFromTeacher/pkg/game"
+)
+
+//go:embed assets/assets.json
+var assetsJSON []byte
+
+func (g *Game) loadAssets() {
+	// Assets Manifest aus eingebetteter Datei laden
+	var m game.AssetManifest
+	if err := json.Unmarshal(assetsJSON, &m); err != nil {
+		log.Printf("⚠️  Fehler beim Parsen von assets.json: %v", err)
+		g.world.Manifest = game.AssetManifest{Assets: make(map[string]game.AssetDefinition)}
+	} else {
+		g.world.Manifest = m
+		fmt.Println("✅ Assets Manifest geladen (WASM):", len(m.Assets), "Einträge")
+	}
+
+	// Chunks laden (auch per go:embed in chunks_wasm.go)
+	g.loadChunks()
+
+	// Bilder vorladen - In WASM sind die Assets relativ zum HTML
+	baseDir := "./assets"
+	loadedImages := 0
+	failedImages := 0
+	for id, def := range g.world.Manifest.Assets {
+		if def.Filename != "" {
+			path := filepath.Join(baseDir, def.Filename)
+			img, _, err := ebitenutil.NewImageFromFile(path)
+			if err == nil {
+				g.assetsImages[id] = img
+				loadedImages++
+			} else {
+				log.Printf("⚠️  Bild nicht geladen: %s (%s) - Fehler: %v", id, def.Filename, err)
+				failedImages++
+			}
+		}
+	}
+	fmt.Printf("🖼️  Bilder (WASM): %d geladen, %d fehlgeschlagen\n", loadedImages, failedImages)
+}