chore: Use valid license SPDX id. Revert logic refactor.

Cargo.toml

@@ -11,7 +11,7 @@ members = [
 [workspace.package]
 edition = "2021"
 version = "0.1.0"
-license = "AGPL-3"
+license = "AGPL-3.0-or-later"
 
 [workspace.dependencies]
 tokio = { version = "1", features = ["full"] }

crates/core/src/affinity.rs

@@ -93,16 +93,15 @@ pub fn engagement_score(
         return 0.0;
     }
 
-    let mut score = match opened {
-        true => {
+    let mut score = if !opened {
+        0.0
+    } else {
         match (dwell_seconds, estimated_read_seconds) {
             (Some(dwell), Some(est)) if est > 0 => (dwell as f64 / est as f64).min(1.0),
             // Opened but we don't yet know dwell time / read-time estimate:
             // credit partial engagement rather than 0 or 1.
             _ => 0.5,
         }
-        }
-        false => 0.0
     };
 
     if starred {
@@ -366,19 +365,13 @@ mod tests {
     /// 0.3 on top of the dwell-ratio score.
     #[test]
     fn engagement_score_starred_adds_bonus() {
-        assert_eq!(
-            engagement_score(true, Some(30), Some(60), true, false),
-            0.8
-        );
+        assert_eq!(engagement_score(true, Some(30), Some(60), true, false), 0.8);
     }
 
     /// The +0.3 star bonus must also respect the 1.0 ceiling, even when
     /// the dwell ratio alone is already at the max.
     #[test]
     fn engagement_score_starred_bonus_caps_at_one() {
-        assert_eq!(
-            engagement_score(true, Some(60), Some(60), true, false),
-            1.0
-        );
+        assert_eq!(engagement_score(true, Some(60), Some(60), true, false), 1.0);
     }
 }