Align sent attachment previews

[hamzamerzic]

Summary

• render sent images as the same 96 by 96 square crop used by the composer
• keep the full source available through the existing lightbox
• align the focus boundary and image corners at the shared 14px radius
• guard attachment-before-text ordering in both message render paths

Provenance

Squashes the production-local checkpoint 67ce0a58 and follow-ups e8a10051 plus 12343b57 into one final patch on current main 41a3809. The interim 96 by 192 variant is intentionally absent.

Validation

• focused sizing and message-order tests: 2 passed
• full reviewed UI stack: 1,765 frontend library tests and 47 hook tests passed
• production frontend build passed

[hamzamerzic]

Two review rounds complete on exact head 5c22de243237f4d5decb4e1b7baef6b1cc467fdb. Pass 1 verified the 96×96 crop, shared 14px focus/image radius, and attachment-before-text ordering in both render paths. Pass 2 checked lightbox preservation, wrapping/responsive behavior, focus visibility, box sizing, and regression strength. Focused tests pass and all hosted checks are green. No finding; recommendation: merge.

[hamzamerzic]

Landed on protected main through reviewed integration #147 (merge 226106c). The integrated patch matches this PR's reviewed head; closing the superseded source PR to keep the queue truthful.