feat: improved template-based system prompt

notetaker/ViewModels/MeetingViewModel.swift

@@ -118,10 +118,8 @@ class MeetingViewModel: ObservableObject {
             let userBlurb = KeychainHelper.shared.get(forKey: "userBlurb") ?? ""
             let systemPrompt = KeychainHelper.shared.get(forKey: "systemPrompt") ?? Settings.defaultSystemPrompt
             
-            // Generate notes
             meeting.generatedNotes = try await NotesGenerator.shared.generateNotes(
-                transcript: meeting.transcript,
-                userNotes: meeting.userNotes,
+                meeting: meeting,
                 userBlurb: userBlurb,
                 systemPrompt: systemPrompt
             )

notetaker/ViewModels/SettingsViewModel.swift

@@ -26,6 +26,15 @@ class SettingsViewModel: ObservableObject {
         errorMessage = nil
         saveSuccessful = false
         
+        // Validate system prompt template before saving
+        let validation = settings.validateSystemPrompt()
+        if !validation.isValid {
+            let missingVars = validation.missingVariables.joined(separator: ", ")
+            errorMessage = "System prompt is missing required variables: \(missingVars). Please include these variables in your template using double curly braces (e.g., {{transcript}})."
+            isSaving = false
+            return
+        }
+        
         // Save to Keychain
         let deepgramSaved = KeychainHelper.shared.save(settings.deepgramKey, forKey: "deepgramKey")
         let openAISaved = KeychainHelper.shared.save(settings.openAIKey, forKey: "openAIKey")