Fix TTS toggle state reversed on voice enable

Hermes auto-enables TTS when voice mode turns on (auto_tts config).
Our ttsEnabled started as false, so the UI showed off when TTS was
actually on. Now reads auto_tts from config.yaml when voice enables
and sets the initial state to match.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scarf/scarf/Core/Models/HermesConfig.swift

@@ -13,6 +13,7 @@ struct HermesConfig: Sendable {
     var streaming: Bool
     var showReasoning: Bool
     var verbose: Bool
+    var autoTTS: Bool
 
     static let empty = HermesConfig(
         model: "unknown",
@@ -26,7 +27,8 @@ struct HermesConfig: Sendable {
         nudgeInterval: 0,
         streaming: true,
         showReasoning: false,
-        verbose: false
+        verbose: false,
+        autoTTS: true
     )
 }
 

scarf/scarf/Core/Services/HermesFileService.swift

@@ -42,7 +42,8 @@ struct HermesFileService: Sendable {
             nudgeInterval: Int(values["memory.nudge_interval"] ?? "") ?? 0,
             streaming: values["display.streaming"] != "false",
             showReasoning: values["display.show_reasoning"] == "true",
-            verbose: values["agent.verbose"] == "true"
+            verbose: values["agent.verbose"] == "true",
+            autoTTS: values["voice.auto_tts"] != "false"
         )
     }
 

scarf/scarf/Features/Chat/ViewModels/ChatViewModel.swift

@@ -5,6 +5,7 @@ import SwiftTerm
 @Observable
 final class ChatViewModel {
     private let dataService = HermesDataService()
+    private let fileService = HermesFileService()
 
     var recentSessions: [HermesSession] = []
     var sessionPreviews: [String: String] = [:]
@@ -63,6 +64,7 @@ final class ChatViewModel {
         } else {
             sendToTerminal(tv, text: "/voice on\r")
             voiceEnabled = true
+            ttsEnabled = fileService.loadConfig().autoTTS
         }
     }