Pinning an app to the primary location isn't a fact about its storage,
it's a statement about whether the field is editable — so it belongs in
the comment, where the renderer's other display metadata already lives.
webui_generate_configs.sh already parses **ADVANCED** out of a field's
comment; **READONLY** parses the same way and needs no new key, no
engine-side list, and no special case in appDir or the migrate path. It
also has uses beyond this feature: crowdsec.config:72 warns that editing
a field does nothing, next to an editable input.
Also records why CFG_<APP>_STORAGE holds a location name rather than a
path, since it's the kind of decision that gets relitigated: mount paths
move (relabel, /media/<user>/…, a different session) and a name means
re-registering once instead of rewriting every app config; and migrate's
central question — "this host has no such location, where should it go?"
— is a registry lookup, not a string comparison. The config stores intent,
the manifest stores fact. Unlike backup locations there's no case for a
custom-path override: root only touches registered roots, so a path
outside the registry is unusable rather than merely discouraged.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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