Clear the snapshot — called from resetToDefaults / loadSettings.
Recompute the cinematic-mode checkbox from the current effects state (majority vote over the four signal effects, including ACES tone mapping).
Bloom is applied by the preset but deliberately kept OUT of the vote: it is commonly enabled on its own for HDR data, so counting it would flip the checkbox on scenes that are not cinematic at all.
Toggle cinematic mode. Uses the same majority-vote algorithm as the checkbox: enables if < 50 % of signal effects are on, otherwise disables. Snapshots / restores the affected settings (with dirty-check on restore).
Owns the cinematic-mode snapshot and exposes the toggle/checkbox-update methods the facade used to host directly.