First public release v2.3.1

oAI/Models/Message.swift

@@ -46,6 +46,9 @@ struct Message: Identifiable, Codable, Equatable {
     // Streaming state (not persisted)
     var isStreaming: Bool = false
 
+    // Star state (not persisted in messages table — tracked via message_metadata for saved conversations)
+    var isStarred: Bool = false
+
     // Generated images from image-output models (base64-decoded PNG/JPEG data)
     var generatedImages: [Data]? = nil
 

oAI/Models/SessionStats.swift

@@ -30,6 +30,7 @@ struct SessionStats {
     var totalOutputTokens: Int = 0
     var totalCost: Double = 0.0
     var messageCount: Int = 0
+    var hasCostData: Bool = false
     
     var totalTokens: Int {
         totalInputTokens + totalOutputTokens
@@ -46,14 +47,18 @@ struct SessionStats {
     }
     
     var totalCostDisplay: String {
-        String(format: "$%.4f", totalCost)
+        hasCostData ? String(format: "$%.4f", totalCost) : "N/A"
     }
-    
+
     var averageCostPerMessage: Double {
         guard messageCount > 0 else { return 0.0 }
         return totalCost / Double(messageCount)
     }
-    
+
+    var averageCostDisplay: String {
+        hasCostData ? String(format: "$%.4f", averageCostPerMessage) : "N/A"
+    }
+
     mutating func addMessage(inputTokens: Int?, outputTokens: Int?, cost: Double?) {
         if let input = inputTokens {
             totalInputTokens += input
@@ -63,14 +68,16 @@ struct SessionStats {
         }
         if let messageCost = cost {
             totalCost += messageCost
+            hasCostData = true
         }
         messageCount += 1
     }
-    
+
     mutating func reset() {
         totalInputTokens = 0
         totalOutputTokens = 0
         totalCost = 0.0
         messageCount = 0
+        hasCostData = false
     }
 }