Two review findings.
1. After R3 every production rebuild path uses `compile_effective_routes`;
`compile_routes` (the old app-only compile) was called only by its own
two unit tests, and its "runs in build_app" doc was stale — so the
lenient-skip + disabled-drop regression guards no longer covered the
live path. Remove `compile_routes` + its re-export, fold the lenient-skip
rationale onto `compile_one`, and port both guards to
`compile_effective_routes` (app-only rows are just depth-0 effective
rows). Add a third guard pinning nearest-owner shadowing at the pure-
compile layer. Fix the stale `compile_routes` mention in apply_service.
2. Document the disabled + inherited semantic: the `enabled` filter runs
before the shadow check, so a disabled own-route does not claim its
binding and an enabled ancestor template at the same path falls through
("disabled = absent", §4.3). Recorded on `compile_effective_routes` and
in design §4.5 — the corollary (can't 404 an inherited route by
disabling a same-path own route) points at the deferred per-app opt-out.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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