[Web] Destroy GPUDevice once on buffer creation error

[guan404ming]

Why

In tryCreateBuffer, each of the three popped error scopes independently called device.destroy() and console.error, so a buffer that triggers more than one error type destroyed the device repeatedly and logged duplicate errors.

How

• Collect all three popErrorScope() results via Promise.all and call device.destroy() at most once
• Log every captured error instead of relying on per-scope handlers

[gemini-code-assist]

Code Review

This pull request refactors the WebGPU error scope handling in webgpu.ts to use Promise.all, ensuring that device.destroy() is called at most once when multiple error types fire. The reviewer identified two important issues: a potential unhandled promise rejection if popErrorScope() rejects, and a TypeScript type narrowing issue where errors.filter does not automatically cast the array to GPUError[]. A code suggestion was provided to add a .catch() block and an explicit type guard.

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