Foundation for the generalized view model: `.zddc` declares, per URL shape,
which tool renders and where its supporting config lives.
- ZddcFile.Views map[string]ViewSpec{Tool, Config}; shapes "dir" / "dir_slash"
/ "file". config is a filename resolved under <dir>/.zddc.d/. Pure data — no
behaviour; presentation/routing only (ACL/WORM/admin stay server-enforced).
- lookups.ViewAt(root, dir, shape): cascade leaf→root first-match, with
default_tool / dir_tool honored as sugar for dir / dir_slash (semantics
unchanged). No merged map — resolved per-shape like DefaultToolAt.
- cascade summary, isZero/is-empty checks, and validation (tool ∈ AppNames;
config a path-bounded plain filename). Client .zddc validator (preview-yaml.js)
gains a `views` key + `viewmap` case.
Additive only — nothing consumes Views yet (the generic resolver + dispatch
wiring + recognizer retirement follow). go build + zddc/handler tests green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ZDDC
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