Add authentication server, dev CLI, Docker multi-service setup, and cross-platform improvements

server/internal/interceptor/platform.go

@@ -0,0 +1,15 @@
+package interceptor
+
+import (
+	"context"
+
+	"lunar-tear/server/internal/model"
+
+	"google.golang.org/grpc"
+)
+
+func Platform(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
+	p := model.ClientPlatformFromHeaders(ctx)
+	ctx = model.NewContextWithPlatform(ctx, p)
+	return handler(ctx, req)
+}