Cameras (Hikvision) return `Content-Type: image/jpeg; charset="UTF-8"` — a
charset param on a binary body is malformed, and browsers refuse to decode an
<img> declared that way. Old capture code persisted that raw header into
snapshots.content_type (100/101 dev-DB rows); GET /api/snapshots/:id re-emitted
it verbatim, so every legacy snapshot rendered blank in the booth modal.
Capture was already hardened (encodeForStorage re-encodes to a clean
image/jpeg, fail-soft via cleanType), but the serve route trusted the stored
value. Export cleanType and apply it when setting the response header, so a
bare image/jpeg is sent regardless of what was stored — un-breaks all legacy
rows with no data migration. A stored value from an untrusted device is itself
input; normalize on capture AND on serve. Adds cleanType unit tests.
Verified: a previously-unrenderable 2560x1440 row now decodes in-browser.
Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V
julian
cfac14e09e