Two related routing fixes:
1. /<project>/archive/<party>/mdl[/] now follows the slash/no-slash
convention uniformly with the rest of the system:
- mdl (no slash) → tables app (default tool for mdl/)
- mdl/ (slash) → browse (ServeDirectory empty-listing fallback)
Previously the slash form auto-redirected to mdl/table.html, which
forced the user into the table view from any party-folder click and
produced a confusing "Unrecognized table URL" error when the
redirect race-conditioned. tableRowsRedirect now only redirects
when a real on-disk table.yaml exists; the default-MDL virtual case
stays in browse via the convention.
New zddc.IsArchivePartyMdlDir helper recognises the canonical
<project>/archive/<party>/mdl pattern at depth 4 (relative path).
fs.ListDirectory uses it to return [] for the missing-on-disk case
so browse renders the empty workspace cleanly. Test updated
(TestServeDirectoryRedirectsDefaultMdl → TestServeDirectoryDefaultMdlNoRedirect).
2. <dir>/.zddc URLs now work at every directory depth.
The dispatcher previously 404'd anything beginning with a dot
(except /.archive and /<dir>/.zddc.html). New IsZddcFileRequest +
ServeZddcFile handlers carve out the raw .zddc leaf so an operator
can navigate to /Project-1/archive/PartyA/mdl/.zddc and inspect
the rules effective at that depth.
Semantics:
- Method: GET / HEAD only. Writes go through the existing admin-
gated form at <dir>/.zddc.html (unchanged).
- ACL: parent directory's read permission gates access; 404
(not 403) is returned to non-readers so existence isn't leaked.
- On disk: file bytes served verbatim with
Content-Type: application/yaml and X-ZDDC-Source: file:<rel>.
- Virtual: when no file exists at this level, a synthetic
placeholder body is returned with a YAML-comment cascade
summary so the reader sees exactly what rules apply here from
ancestors. X-ZDDC-Source: virtual:zddc distinguishes it.
The virtual body parses as valid YAML (`{}` after the comments) so
downstream tooling that consumes the URL isn't confused.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
