iOS Live Activity Updates

Nucleic-Session: 665980BA-E8A5-4E84-9DF4-1757CF792353
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/Shared/SessionActivityAttributes.swift

@@ -64,6 +64,19 @@ struct NucleicSessionAttributes: ActivityAttributes {
         /// The most urgent sessions, attention-first (capped, typically ≤3): the detail rows.
         var lines: [SessionLine]
 
+        /// The attention-bearing fingerprint of the glance: the headline counts plus each row's
+        /// identity and `kind`. Deliberately EXCLUDES the mid-turn churn (files/±lines and the
+        /// churn-derived detail), which ticks on every transcript edit while the agent works.
+        /// `LiveActivityManager` gates its `activity.update` on this so the glance refreshes on a
+        /// status change — a session starting, finishing, needing approval/input — not on every diff
+        /// delta mid-turn (which would burn ActivityKit's update budget for an illegible number).
+        /// Mirrors the host's `LiveActivitySnapshot.attentionSignature`.
+        var attentionSignature: [String] {
+            var parts = ["run:\(runningCount)", "need:\(needsYouCount)", "appr:\(approvalCount)"]
+            parts.append(contentsOf: lines.map { "\($0.id):\($0.kind.rawValue)" })
+            return parts
+        }
+
         /// The single most urgent session (drives the compact/minimal regions).
         var top: SessionLine? { lines.first }
         /// Whether anything needs the user (waiting session or a pending approval).