- Created `src/app/api/zxdb/download/route.ts` to serve local files.
- Updated `resolveLocalLink` in `src/server/repo/zxdb.ts` to return
API-relative URLs with `source` and `path` parameters.
- Encodes the relative subpath to ensure correct URL construction.
- Includes security checks in the API route to prevent path traversal.
- Updated `docs/ZXDB.md` to reflect the proxy mechanism.
Signed-off: junie@lucy.xalior.com