Eleven profiles across six bundles each carried the same line:
profileConfig?.assetsBase || './assets'
That default is right on a standalone leaf page, where the generated host passes
'../../assets' and the tree root is two segments up. It is wrong the moment the
element is nested in the cap-5 shell, because a relative path resolves against
the SHELL's page, not the child's. Measured in a browser on the built tree:
leaf /doxa-maps/gospel-resources/resources-map/index.html ... 0 failed
shell /doxa-maps/doxa-maps-spa/doxa-maps-spa/index.html ...... 404 assets/tables/gospel-by-country.json
404 assets/boundaries/world-adm0.geojson
No build-time gate could see it: './assets' is a valid string in both hosts, and
only the host decides what it resolves to. check-composite-srcs proves a nested
src exists on disk, which is a different question.
resolveAssetsBase() in library/utils/embedBase.js now derives an absolute base
from the bundle's own script URL (or the treeBase the shell already forwards),
and deliberately REJECTS a relative assetsBase from config -- honouring it would
reintroduce the defect through the config meant to cure it.
The fix is in the child, not the shell, so a new bundle that fetches assets
works nested on day one with no edit to doxa-maps-spa.vue.
Verified: shell 404s 2 -> 0 on Gospel Resources; Cities & Internet, UPG-100 and
Big Picture also 0 asset 404s; leaf hosts unchanged at 0.
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