fusion

Files

gsxdsm 7137e36ccb FN-7073: serve file previews inline

File viewer previews now request inline-safe responses while downloads remain attachments.

- Add an inline preview query option to file download URL helpers and preview consumers.
- Serve known media and PDF preview extensions with real MIME types, inline disposition, nosniff, and sandbox CSP headers.
- Keep explicit downloads and unknown file types on attachment/octet-stream behavior.
- Cover preview and download header behavior with dashboard route and component tests.

Files changed:
 .changeset/fn-7073-file-viewer-inline-preview.md   |   7 +
 docs/dashboard-guide.md                            |   2 +-
 packages/dashboard/app/api/legacy.ts               |   9 +-
 .../dashboard/app/components/DockFilesView.tsx     |   2 +-
 .../dashboard/app/components/FileBrowserModal.tsx  |   2 +-
 .../components/__tests__/DockFilesView.test.tsx    |  14 +-
 .../components/__tests__/FileBrowserModal.test.tsx |  12 +-
 .../register-file-workspace-routes.test.ts         | 141 +++++++++++++++++++++
 .../src/routes/register-file-workspace-routes.ts   | 111 +++++++++++-----
 9 files changed, 260 insertions(+), 40 deletions(-)

Fusion-Task-Id: FN-7073
Fusion-Task-Lineage: 922b4aa4-ac6d-4a59-b94f-bab4eeb65530

2026-06-26 14:33:58 -07:00