Fix lifting note title delimiter parity

[bhelm]

Summary

Fixes the cross-platform lifting-note title delimiter mismatch documented in bhelm/noop#93.

Swift formatted a titled volume-load note with - while Android used : . This changes only the Swift title prefix to : and keeps parsing, calculations, persistence, and untitled-note behavior unchanged.

Tests

• Adds mirrored exact Swift/Kotlin assertions for titled, nil/null-title, and empty-title notes.
• Fresh independent static review of the exact frozen union delta passed with no P0/P1 findings; this PR's frozen three-file patch is an exact reviewed constituent (patch SHA-256 5b5d1f86ca41f23b5aa5ca5a39587dad429a468daf84d5ccc24e6e86a7ac98c6).
• Combined Native validation on the reviewed union (c7571fd020d6947594eb79198ba88ece7ab4648824c312e0bbee9e14f1150d97) exercised this exact named test: Swift focused 1/1 passed; Swift affected 28 tests passed; Swift full 241 tests passed with 1 skip. Kotlin focused aggregate 7 tests passed; affected 35 passed; full 4,157 passed with 6 skips and no failures/errors.
• Evidence artifact: /root/whoop/validation/product-fixes-93-99-union-native/43-final-audit.txt (recorded 2026-08-20, exact union hash and named-test occurrence audit).