Fix TensorAlloc copy that was copying the ptr

src/TensorAlloc.zig

@@ -60,9 +60,9 @@ pub fn Tensor(
         }
 
         pub fn copy(self: *const Self, alloc: Allocator) !Self {
-            var new = try splat(alloc, 0);
-            new.data = self.data;
-            return new;
+            const vec_ptr = try alloc.create(Vec);
+            vec_ptr.* = self.data.*;
+            return .{ .data = vec_ptr };
         }
 
         /// Convert N-D coords (row-major) to flat index — fully comptime.

src/lib.zig

@@ -2,6 +2,7 @@ const std = @import("std");
 
 pub const TensorStatic = @import("TensorStatic.zig").Tensor;
 pub const TensorAlloc = @import("TensorAlloc.zig").Tensor;
+pub const TensorGpu = @import("TensorGpu.zig").Tensor;
 pub const Dimensions = @import("Dimensions.zig");
 pub const Scales = @import("Scales.zig");
 pub const Base = @import("Base.zig");

src/test.zig

@@ -1,6 +1,7 @@
 test {
     _ = @import("TensorStatic.zig");
     _ = @import("TensorAlloc.zig");
+    _ = @import("TensorGpu.zig");
     _ = @import("Dimensions.zig");
     _ = @import("Scales.zig");
     _ = @import("Base.zig");