Add Text-to-Speech and Speech-to-Text features

- Add TTS service using AVSpeechSynthesizer for voice output
- Add STT service using SpeechAnalyzer (macOS 26) for transcription
- Add voice input (microphone) button in chat with recording level indicator
- Add speak button on assistant messages for TTS playback
- Add language toggle (EN-CA/FR-CA) for bilingual speech recognition
- Fix Swift 6 strict concurrency issues in audio callbacks
- Update proto schema with TTS/STT message types and RPCs
- Update gRPC provider with speech service endpoints

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Sources/AppleIntelligenceServer/main.swift

@@ -37,7 +37,21 @@ struct AppleIntelligenceServer: AsyncParsableCommand {
             throw ExitCode.failure
         }
 
-        let provider = AppleIntelligenceProvider(service: service, apiKey: config.apiKey)
+        // Initialize speech services
+        print("Initializing Text-to-Speech service...")
+        let ttsService = TextToSpeechService()
+
+        print("Initializing Speech-to-Text service...")
+        let sttService = await SpeechToTextService()
+        let sttStatus = await sttService.getStatus()
+        print("Speech-to-Text status: \(sttStatus)")
+
+        let provider = AppleIntelligenceProvider(
+            service: service,
+            ttsService: ttsService,
+            sttService: sttService,
+            apiKey: config.apiKey
+        )
 
         let transport = HTTP2ServerTransport.Posix(
             address: .ipv4(host: bindHost, port: bindPort),
@@ -52,7 +66,15 @@ struct AppleIntelligenceServer: AsyncParsableCommand {
             print("API key authentication is enabled")
         }
         print("Server is ready to accept connections")
-        print("Health check: grpcurl -plaintext \(bindHost):\(bindPort) appleintelligence.AppleIntelligence/Health")
+        print("")
+        print("Available services:")
+        print("  - Complete/StreamComplete: Text generation with Apple Intelligence")
+        print("  - TextToSpeech: Convert text to spoken audio")
+        print("  - ListVoices: List available TTS voices")
+        print("  - Transcribe: Convert audio file to text")
+        print("  - StreamTranscribe: Real-time speech-to-text")
+        print("")
+        print("Health check: grpcurl -plaintext \(bindHost):\(bindPort) appleintelligence.AppleIntelligenceService/Health")
         print("Press Ctrl+C to stop the server")
 
         try await server.serve()