[KeyffMS]

R2f

Small move-only continuation of #83 R2.

Scope:

• move the existing read-only ApplicationState::view implementation from crates/lantern-app/src/application.rs to the existing crates/lantern-app/src/application/view.rs boundary;
• preserve the method body and public API semantics;
• keep exactly one ApplicationState and the top-level ApplicationState::reduce in application.rs.

Safety/architecture:

• no behavior changes intended;
• no reducer/action/effect semantics changed;
• write confirmation and restore confirmation remain unchanged in application.rs, so the existing exact-confirmation architecture gate continues to cover them directly;
• no scheduler/budget/fairness/QueueFull changes;
• no write/restore/session authority changes and no conformance/gate weakening.

Refs #83