feat: enhance transcript handling with collapsed chunks

notetaker/Models/Meeting.swift

@@ -7,9 +7,18 @@ enum AudioSource: String, Codable, CaseIterable {
     var displayName: String {
         switch self {
         case .mic:
-            return "Microphone"
+            return "Me"
         case .system:
-            return "System Audio"
+            return "Them"
+        }
+    }
+    
+    var copyPrefix: String {
+        switch self {
+        case .mic:
+            return "Me"
+        case .system:
+            return "Them"
         }
     }
     
@@ -39,6 +48,20 @@ struct TranscriptChunk: Codable, Identifiable, Hashable {
     }
 }
 
+struct CollapsedTranscriptChunk: Identifiable {
+    let id: UUID
+    let timestamp: Date
+    let source: AudioSource
+    let combinedText: String
+    
+    init(id: UUID = UUID(), timestamp: Date, source: AudioSource, combinedText: String) {
+        self.id = id
+        self.timestamp = timestamp
+        self.source = source
+        self.combinedText = combinedText
+    }
+}
+
 struct Meeting: Codable, Identifiable, Hashable {
     let id: UUID
     let date: Date
@@ -66,6 +89,86 @@ struct Meeting: Codable, Identifiable, Hashable {
             .joined(separator: " ")
     }
     
+    // Formatted transcript for copying with collapsed sequential chunks
+    var formattedTranscript: String {
+        let finalChunks = transcriptChunks.filter { $0.isFinal }
+        
+        guard !finalChunks.isEmpty else { return "" }
+        
+        var result: [String] = []
+        var currentSource: AudioSource?
+        var currentTexts: [String] = []
+        
+        for chunk in finalChunks {
+            if chunk.source != currentSource {
+                // Finish previous section if exists
+                if let source = currentSource, !currentTexts.isEmpty {
+                    let combinedText = currentTexts.joined(separator: " ")
+                    result.append("\(source.copyPrefix): \(combinedText)")
+                }
+                
+                // Start new section
+                currentSource = chunk.source
+                currentTexts = [chunk.text]
+            } else {
+                // Same source, add to current section
+                currentTexts.append(chunk.text)
+            }
+        }
+        
+        // Finish last section
+        if let source = currentSource, !currentTexts.isEmpty {
+            let combinedText = currentTexts.joined(separator: " ")
+            result.append("\(source.copyPrefix): \(combinedText)")
+        }
+        
+        return result.joined(separator: "  \n")
+    }
+    
+    // Collapsed chunks for UI display
+    var collapsedTranscriptChunks: [CollapsedTranscriptChunk] {
+        guard !transcriptChunks.isEmpty else { return [] }
+        
+        var result: [CollapsedTranscriptChunk] = []
+        var currentSource: AudioSource?
+        var currentTexts: [String] = []
+        var currentTimestamp: Date?
+        
+        for chunk in transcriptChunks {
+            if chunk.source != currentSource {
+                // Finish previous section if exists
+                if let source = currentSource, !currentTexts.isEmpty, let timestamp = currentTimestamp {
+                    let combinedText = currentTexts.joined(separator: " ")
+                    result.append(CollapsedTranscriptChunk(
+                        timestamp: timestamp,
+                        source: source,
+                        combinedText: combinedText
+                    ))
+                }
+                
+                // Start new section
+                currentSource = chunk.source
+                currentTexts = [chunk.text]
+                currentTimestamp = chunk.timestamp
+            } else {
+                // Same source, add to current section
+                currentTexts.append(chunk.text)
+            }
+        }
+        
+        // Finish last section
+        if let source = currentSource, !currentTexts.isEmpty, let timestamp = currentTimestamp {
+            let combinedText = currentTexts.joined(separator: " ")
+            result.append(CollapsedTranscriptChunk(
+                timestamp: timestamp,
+                source: source,
+                combinedText: combinedText
+            ))
+        }
+        
+        return result
+    }
+    
     // Separate computed properties for mic and system transcripts
     var micTranscript: String {
         return transcriptChunks