perf(studio): header-only nitro validation for fake/broken scan

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The cleanup scan used to read every .nitro bundle in full and decompress
the large PNG texture just to confirm the file is structurally valid. On
directories with hundreds of thousands of bundles this took minutes, the
reverse proxy cut the request at its 30s timeoutable with an HTML 504, and
the panel then crashed with "Unexpected token '<'".

Validate bundles with a cheap header-only read (a few KB, no decompression)
that mirrors parseNitroBundle's byte layout; only files whose header looks
suspicious get the expensive full parse. Robust against downloads that
landed as an HTML error page, truncated or zero-filled files. The scan
drops from minutes to seconds on large nitro directories.

Also guard the panel against non-JSON (proxy error page / HTML) responses
so it reports a clear error message instead of a JSON parse failure.

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openhands committed 2026-09-16 15:50:04 +02:00

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commit 3d7278e96d

2 files changed

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src/lib/services/nitro-cleanup.ts

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