frontend -> frontendNew migration status

Completed scope

frontendNew is the only supported application surface. Character routes are under /dcalc/character/:alter/(equipment|skill|forge|result); legacy frontend URLs are not redirected or maintained.
The existing API contracts, Pinia configuration schema, and dcalc/<alter>/config storage keys remain unchanged.
Equipment, Skill, Forge, imports, result details, baseline comparison, and change-source logs are implemented in frontendNew.

Suite double-click now applies the selected rarity as an idempotent bulk wear operation for both equipment and oaths. It never toggles already equipped items off.
Equipment choices and bulk wear actions append a single Equipment change-source record; Skill, Forge, and import actions keep their existing records.
Character configuration changes are debounced and serialized. A change received during an active calculation queues one follow-up calculation and every completed attempt persists the latest configuration.
Character switches reset in-memory configuration and skill counts before loading that role's persisted data. Stale character responses are ignored by their Alter-Token.
The unused global result sheet was removed from the Character shell. Equipment, Skill, and Forge retain their one local summary panel; /result remains the full calculation-detail route.

Legacy frontend build errors and its uncommitted files are not modified.
DNF VP remains a frontendNew-only feature.
No backend API, request payload, configuration field, or local-storage migration is introduced.