* refactor(slides): assert dry-run parent_type instead of deriving it from a placeholder
A wiki --presentation cannot be resolved during a dry-run: the real
presentation token only exists after a get_node call a preview must not
make, so parent_node shows a "<resolved_slides_token>" placeholder.
appendSlidesUploadDryRun derived parent_type from parent_node, which sent
that placeholder through the office-token check.
The value it produced was correct. A placeholder matches no office token
shape, so it fell through to slide_file, and slide_file is right here: a
wiki ref that reaches an upload is native by construction, because
resolvePresentationID rejects any wiki node whose obj_type is not
"slides" and an imported office deck sits in drive as a "file" node.
It was correct by accident, though, which left the preview hostage to the
placeholder's spelling and to every rule later added to
isOfficePresentation. Pass parent_type in explicitly instead, so
slidesDryRunParentType states the wiki case as a decision with its reason
recorded, and the placeholder is never classified.
No behaviour change: dry-run output is byte-identical for native tokens,
imported office tokens, legacy office prefixes, slides URLs, wiki URLs,
and +create, across +media-upload / +add-slide / +update-slide.
Tests pin the contract the refactor protects, including a wiki ref whose
node token is itself office-shaped -- a wiki node token and the deck token
it points at are different tokens in different namespaces, so classifying
ref.Token would be wrong for a wiki ref even though it is right for every
other kind. That is the regression this makes impossible.
* test(slides): use the fixture hostname for the wiki dry-run probes
domaincontract rejects "bytedance.larkoffice.com": it is in neither
allowlist, and a real tenant host does not belong in a fixture. Use
example.feishu.cn, already in fixture-domains.txt and the hostname the
rest of the slides wiki tests use.
The URL is only a parse fixture -- nothing resolves it -- so only the
hostname changes.
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