feat(cropper): save with the session token — no OTP, domain from a2loft

Consumes the a2loft cropper-token-auth change: the save now sends the
session's PocketBase token as a bearer credential and no phone/otp. The
backend authorizes with OpenFGA crop_image (domain:<code> -> domain:idid),
so an operator no longer needs super-user rights in the profile's domain —
which is what made saves fail with a blanket 'Invalid OTP specified.'.

- the save's domain comes from a2loft's own record of the picture
  (dims/picture/{uploadId} -> domainCode), falling back to the queue label,
  guarded by a path-safety pattern instead of the catalog check
- the 'core' -> 'uc' alias is deleted: 'core' is a2loft's own pseudo-domain
  for a profile picture (special-cased there), so rewriting it changed the
  attribution and the ID-card notification
- queue loads are enriched with the profile's domainCode; the panel shows
  the profile's domain and, when it differs, the picture target
- the cropper's OTP field, state and parameters are gone; the fingerprint
  wizard is untouched (its own OTP flow on its own endpoints)
- tests updated: bearer + no query auth, resolved domain wins, unsafe values
  refused, no OTP field served (46 pass)

Requires the a2loft change deployed first.

openspec/changes/cropper-token-auth/proposal.md

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+# Proposal: cropper-token-auth
+
+## Why
+
+The cropper's save proves the operator with a phone number and an OTP. a2loft
+resolves that phone against the domain being saved to, so an operator without
+super-user rights in that domain is rejected with a blanket `Invalid OTP
+specified.` — even though they are authorized to crop images for the domain.
+The a2loft endpoints now accept a PocketBase token (see the a2loft change
+`cropper-token-auth`), which authorizes with OpenFGA `crop_image` and takes the
+actor's identity from the token.
+
+## What Changes
+
+- The cropper's save posts the **session token** to a2loft instead of `phone` +
+  `otp`; the OTP input is removed from the UI.
+- The save's domain comes from **a2loft's own picture record**
+  (`dims/picture/{uploadId}` → `domainCode`), falling back to the queue item's
+  label, and the panel shows both (the profile's domain and the picture
+  target).
+- The `core → uc` alias is deleted: `core` is a2loft's own pseudo-domain for a
+  profile picture, not an alias for `uc`.
+- The fingerprint wizard's staff lookup and fingerprint save keep their OTP;
+  only the cropper's calls change.
+
+## Capabilities
+
+### New Capabilities
+
+(none)
+
+### Modified Capabilities
+
+- `image-cropper`: the save is token-authenticated (no OTP), the domain comes
+  from a2loft's record, and the OTP requirement is removed.
+
+## Impact
+
+- `tools/cropper.js`: save handler (Bearer token, no `?otp=`), domain
+  resolution via dims with the label as fallback, path-safety check replacing
+  the catalog check, queue loads enriched with the profile's domain.
+- `tools/public/assets/cropper/`: the OTP field and all `otp` state removed;
+  the panel shows the profile's domain and the picture target.
+- Requires the a2loft `cropper-token-auth` change to be deployed first.