Require data URLs for code-mode image output - #33659
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## What changed - Accept image output from `image()` and `generatedImage()` only when its URL uses the `data:` scheme. - Preserve the dedicated error for remote HTTP URLs and report other malformed or unsupported image URLs as invalid image output. ## Testing - Add service-level coverage for rejecting invalid output from both image helpers. - Add an end-to-end code-mode test that verifies the tool call fails instead of returning an invalid image item. GitOrigin-RevId: beaf8c8830574150e8166b6ff5daf7f6dc4dc0a1
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Require data URLs for code-mode image output
What changed
image()andgeneratedImage()only when its URLuses the
data:scheme.or unsupported image URLs as invalid image output.
Testing
helpers.
returning an invalid image item.