Codex desktop app file preview renders valid JSON files as a blank page.

Environment:

• Codex desktop app
• File examples:
• cases/xxxxx/cases.preview.json
• cases/xxxxx/cases.enriched.json

Observed:

• Clicking/opening the JSON file in Codex shows a blank view.
• The file is not empty and is valid JSON.

Validation:

• cases.preview.json: 29KB, parses successfully, Array with 93 items.
• cases.enriched.json: 540KB, parses successfully, Array with 93 items.
• No null bytes.
• head shows normal JSON content.

Expected:

• Codex should display the JSON content or show an error if preview is unsupported, not a blank page.

Workaround:

• Markdown preview file displays normally.

Environment:

• Product: Codex desktop app
• App version: 26.623.101652
• App bundle version: 4674
• App bundle id: com.openai.codex
• Bundled Codex CLI: codex-cli 0.142.5
• PATH Codex CLI: codex-cli 0.130.0
• OS: macOS 15.5 (Build 24F74)
• Kernel: Darwin 24.5.0
• Architecture: arm64