Add unified per-speaker font support and remote transcription service

Font changes:
- Consolidate font settings into single Display Settings section
- Support Web-Safe, Google Fonts, and Custom File uploads for both displays
- Fix Google Fonts URL encoding (use + instead of %2B for spaces)
- Fix per-speaker font inline style quote escaping in Node.js display
- Add font debug logging to help diagnose font issues
- Update web server to sync all font settings on settings change
- Remove deprecated PHP server documentation files

New features:
- Add remote transcription service for GPU offloading
- Add instance lock to prevent multiple app instances
- Add version tracking

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

CLAUDE.md

@@ -174,8 +174,9 @@ See [server/nodejs/README.md](server/nodejs/README.md) for deployment instructio
 
 - [client/server_sync.py](client/server_sync.py) handles server communication
 - Toggle in Settings: "Enable Server Sync"
-- Sends transcriptions to PHP server via POST
-- Separate web display shows merged transcriptions from all users
+- Sends transcriptions to Node.js server via HTTP POST
+- Real-time updates via WebSocket to display page
+- Per-speaker font support (Web-Safe, Google Fonts, Custom uploads)
 - Falls back gracefully if server unavailable
 
 ## Common Patterns
@@ -191,8 +192,8 @@ See [server/nodejs/README.md](server/nodejs/README.md) for deployment instructio
 ### Modifying Transcription Display
 
 - Local GUI: [gui/transcription_display_qt.py](gui/transcription_display_qt.py)
-- Web display (OBS): [server/web_display.py](server/web_display.py) (HTML in `_get_html()`)
-- Multi-user display: [server/php/display.php](server/php/display.php)
+- Local web display (OBS): [server/web_display.py](server/web_display.py) (HTML in `_get_html()`)
+- Multi-user display: [server/nodejs/server.js](server/nodejs/server.js) (display page in `/display` route)
 
 ### Adding a New Model Size
 

client/config.py

@@ -19,6 +19,10 @@ class Config:
         self.app_dir = Path.home() / ".local-transcription"
         self.app_dir.mkdir(parents=True, exist_ok=True)
 
+        # Fonts directory for custom font files
+        self.fonts_dir = self.app_dir / "fonts"
+        self.fonts_dir.mkdir(parents=True, exist_ok=True)
+
         if config_path is None:
             self.config_path = self.app_dir / "config.yaml"
         else:
@@ -34,7 +38,7 @@ class Config:
                 self.config = yaml.safe_load(f) or {}
         else:
             # Load default configuration
-            default_config_path = Path(__file__).parent.parent / "config" / "default_config.yaml"
+            default_config_path = Path(__file__).resolve().parent.parent / "config" / "default_config.yaml"
             if default_config_path.exists():
                 with open(default_config_path, 'r') as f:
                     self.config = yaml.safe_load(f) or {}
@@ -137,5 +141,24 @@ class Config:
         self.config = self._get_default_config()
         self.save()
 
+    def get_custom_fonts(self) -> list:
+        """
+        Get list of custom font files in the fonts directory.
+
+        Returns:
+            List of (font_name, font_path) tuples
+        """
+        fonts = []
+        font_extensions = {'.ttf', '.otf', '.woff', '.woff2'}
+
+        if self.fonts_dir.exists():
+            for font_file in self.fonts_dir.iterdir():
+                if font_file.suffix.lower() in font_extensions:
+                    # Use filename without extension as font name
+                    font_name = font_file.stem
+                    fonts.append((font_name, font_file))
+
+        return sorted(fonts, key=lambda x: x[0].lower())
+
     def __repr__(self) -> str:
         return f"Config(path={self.config_path})"

client/instance_lock.py

@@ -0,0 +1,94 @@
+"""Single instance lock management for Local Transcription application."""
+
+import os
+import sys
+from pathlib import Path
+
+
+class InstanceLock:
+    """Manages single instance lock using a PID file."""
+
+    def __init__(self):
+        """Initialize the instance lock."""
+        self.lock_dir = Path.home() / '.local-transcription'
+        self.lock_file = self.lock_dir / 'app.lock'
+
+    def acquire(self) -> bool:
+        """
+        Try to acquire the instance lock.
+
+        Returns:
+            True if lock acquired (no other instance running),
+            False if another instance is already running.
+        """
+        # Ensure lock directory exists
+        self.lock_dir.mkdir(parents=True, exist_ok=True)
+
+        if self.lock_file.exists():
+            try:
+                pid_str = self.lock_file.read_text().strip()
+                if pid_str:
+                    pid = int(pid_str)
+                    if self._is_process_running(pid):
+                        return False
+            except (ValueError, OSError):
+                # Invalid PID file, we can overwrite it
+                pass
+
+        # Write our PID to the lock file
+        try:
+            self.lock_file.write_text(str(os.getpid()))
+            return True
+        except OSError:
+            return False
+
+    def release(self):
+        """Release the instance lock."""
+        try:
+            if self.lock_file.exists():
+                # Only remove if it contains our PID
+                pid_str = self.lock_file.read_text().strip()
+                if pid_str and int(pid_str) == os.getpid():
+                    self.lock_file.unlink()
+        except (ValueError, OSError):
+            pass
+
+    def _is_process_running(self, pid: int) -> bool:
+        """
+        Check if a process with the given PID is running.
+
+        Args:
+            pid: Process ID to check
+
+        Returns:
+            True if process is running, False otherwise
+        """
+        if sys.platform == 'win32':
+            # Windows
+            try:
+                import ctypes
+                kernel32 = ctypes.windll.kernel32
+                SYNCHRONIZE = 0x00100000
+                process = kernel32.OpenProcess(SYNCHRONIZE, False, pid)
+                if process:
+                    kernel32.CloseHandle(process)
+                    return True
+                return False
+            except Exception:
+                return False
+        else:
+            # Unix/Linux/macOS
+            try:
+                os.kill(pid, 0)
+                return True
+            except OSError:
+                return False
+
+    def __enter__(self):
+        """Context manager entry."""
+        return self.acquire()
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        """Context manager exit."""
+        self.release()
+        return False

client/remote_transcription.py

@@ -0,0 +1,346 @@
+"""
+Remote Transcription Client
+
+Handles streaming audio to a remote transcription service and receiving transcriptions.
+Provides fallback to local transcription if the remote service is unavailable.
+"""
+
+import asyncio
+import base64
+import json
+import logging
+import numpy as np
+from datetime import datetime
+from threading import Thread, Lock
+from typing import Optional, Callable
+from queue import Queue, Empty
+
+logger = logging.getLogger(__name__)
+
+
+class RemoteTranscriptionClient:
+    """
+    Client for remote transcription service.
+
+    Streams audio to a remote server and receives transcriptions.
+    """
+
+    def __init__(
+        self,
+        server_url: str,
+        api_key: str,
+        on_transcription: Optional[Callable[[str, bool], None]] = None,
+        on_error: Optional[Callable[[str], None]] = None,
+        on_connection_change: Optional[Callable[[bool], None]] = None,
+        sample_rate: int = 16000
+    ):
+        """
+        Initialize remote transcription client.
+
+        Args:
+            server_url: WebSocket URL of the transcription service
+            api_key: API key for authentication
+            on_transcription: Callback for transcriptions (text, is_preview)
+            on_error: Callback for errors
+            on_connection_change: Callback for connection status changes
+            sample_rate: Audio sample rate
+        """
+        self.server_url = server_url
+        self.api_key = api_key
+        self.sample_rate = sample_rate
+        self.on_transcription = on_transcription
+        self.on_error = on_error
+        self.on_connection_change = on_connection_change
+
+        self.websocket = None
+        self.is_connected = False
+        self.is_authenticated = False
+        self.is_running = False
+
+        self.audio_queue: Queue = Queue()
+        self.send_thread: Optional[Thread] = None
+        self.receive_thread: Optional[Thread] = None
+        self.loop: Optional[asyncio.AbstractEventLoop] = None
+
+        self._lock = Lock()
+
+    async def _connect(self):
+        """Establish WebSocket connection and authenticate."""
+        try:
+            import websockets
+
+            logger.info(f"Connecting to {self.server_url}")
+            self.websocket = await websockets.connect(
+                self.server_url,
+                ping_interval=30,
+                ping_timeout=10
+            )
+
+            # Authenticate
+            auth_message = {
+                "type": "auth",
+                "api_key": self.api_key
+            }
+            await self.websocket.send(json.dumps(auth_message))
+
+            # Wait for auth response
+            response = await asyncio.wait_for(
+                self.websocket.recv(),
+                timeout=10.0
+            )
+            auth_result = json.loads(response)
+
+            if auth_result.get("type") == "auth_result" and auth_result.get("success"):
+                self.is_connected = True
+                self.is_authenticated = True
+                logger.info("Connected and authenticated to remote transcription service")
+                if self.on_connection_change:
+                    self.on_connection_change(True)
+                return True
+            else:
+                error_msg = auth_result.get("message", "Authentication failed")
+                logger.error(f"Authentication failed: {error_msg}")
+                if self.on_error:
+                    self.on_error(f"Authentication failed: {error_msg}")
+                return False
+
+        except Exception as e:
+            logger.error(f"Connection failed: {e}")
+            if self.on_error:
+                self.on_error(f"Connection failed: {e}")
+            return False
+
+    async def _send_loop(self):
+        """Send audio chunks from the queue."""
+        while self.is_running and self.websocket:
+            try:
+                # Get audio from queue with timeout
+                try:
+                    audio_data = self.audio_queue.get(timeout=0.1)
+                except Empty:
+                    continue
+
+                if audio_data is None:
+                    continue
+
+                # Encode audio as base64
+                audio_bytes = audio_data.astype(np.float32).tobytes()
+                audio_b64 = base64.b64encode(audio_bytes).decode('utf-8')
+
+                # Send to server
+                message = {
+                    "type": "audio",
+                    "data": audio_b64,
+                    "sample_rate": self.sample_rate
+                }
+                await self.websocket.send(json.dumps(message))
+
+            except Exception as e:
+                if self.is_running:
+                    logger.error(f"Send error: {e}")
+                break
+
+    async def _receive_loop(self):
+        """Receive transcriptions from the server."""
+        while self.is_running and self.websocket:
+            try:
+                message = await asyncio.wait_for(
+                    self.websocket.recv(),
+                    timeout=1.0
+                )
+                data = json.loads(message)
+                msg_type = data.get("type", "")
+
+                if msg_type == "transcription":
+                    text = data.get("text", "")
+                    is_preview = data.get("is_preview", False)
+                    if text and self.on_transcription:
+                        self.on_transcription(text, is_preview)
+
+                elif msg_type == "error":
+                    error_msg = data.get("message", "Unknown error")
+                    logger.error(f"Server error: {error_msg}")
+                    if self.on_error:
+                        self.on_error(error_msg)
+
+                elif msg_type == "pong":
+                    pass  # Keep-alive response
+
+            except asyncio.TimeoutError:
+                continue
+            except Exception as e:
+                if self.is_running:
+                    logger.error(f"Receive error: {e}")
+                break
+
+        # Connection lost
+        self.is_connected = False
+        self.is_authenticated = False
+        if self.on_connection_change:
+            self.on_connection_change(False)
+
+    def _run_async(self):
+        """Run the async event loop in a thread."""
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+
+        try:
+            # Connect
+            connected = self.loop.run_until_complete(self._connect())
+            if not connected:
+                return
+
+            # Run send and receive loops
+            tasks = [
+                self._send_loop(),
+                self._receive_loop()
+            ]
+            self.loop.run_until_complete(asyncio.gather(*tasks))
+
+        except Exception as e:
+            logger.error(f"Async loop error: {e}")
+        finally:
+            if self.websocket:
+                try:
+                    self.loop.run_until_complete(self.websocket.close())
+                except:
+                    pass
+            self.loop.close()
+
+    def start(self):
+        """Start the remote transcription client."""
+        with self._lock:
+            if self.is_running:
+                return
+
+            self.is_running = True
+
+            # Start async loop in background thread
+            self.send_thread = Thread(target=self._run_async, daemon=True)
+            self.send_thread.start()
+
+    def stop(self):
+        """Stop the remote transcription client."""
+        with self._lock:
+            self.is_running = False
+
+            # Signal end to server
+            if self.websocket and self.loop:
+                try:
+                    asyncio.run_coroutine_threadsafe(
+                        self.websocket.send(json.dumps({"type": "end"})),
+                        self.loop
+                    )
+                except:
+                    pass
+
+            self.is_connected = False
+            self.is_authenticated = False
+
+    def send_audio(self, audio_data: np.ndarray):
+        """
+        Send audio data for transcription.
+
+        Args:
+            audio_data: Audio data as numpy array (float32, mono, sample_rate)
+        """
+        if self.is_connected and self.is_authenticated:
+            self.audio_queue.put(audio_data)
+
+    @property
+    def connected(self) -> bool:
+        """Check if connected and authenticated."""
+        return self.is_connected and self.is_authenticated
+
+
+class RemoteTranscriptionManager:
+    """
+    Manages remote transcription with fallback to local processing.
+    """
+
+    def __init__(
+        self,
+        server_url: str,
+        api_key: str,
+        local_engine=None,
+        on_transcription: Optional[Callable] = None,
+        on_preview: Optional[Callable] = None
+    ):
+        """
+        Initialize the remote transcription manager.
+
+        Args:
+            server_url: Remote transcription service URL
+            api_key: API key for authentication
+            local_engine: Local transcription engine for fallback
+            on_transcription: Callback for final transcriptions
+            on_preview: Callback for preview transcriptions
+        """
+        self.server_url = server_url
+        self.api_key = api_key
+        self.local_engine = local_engine
+        self.on_transcription = on_transcription
+        self.on_preview = on_preview
+
+        self.client: Optional[RemoteTranscriptionClient] = None
+        self.use_remote = True
+        self.is_running = False
+
+    def _handle_transcription(self, text: str, is_preview: bool):
+        """Handle transcription from remote service."""
+        if is_preview:
+            if self.on_preview:
+                self.on_preview(text)
+        else:
+            if self.on_transcription:
+                self.on_transcription(text)
+
+    def _handle_error(self, error: str):
+        """Handle error from remote service."""
+        logger.error(f"Remote transcription error: {error}")
+        # Could switch to local fallback here
+
+    def _handle_connection_change(self, connected: bool):
+        """Handle connection status change."""
+        if connected:
+            logger.info("Remote transcription connected")
+        else:
+            logger.warning("Remote transcription disconnected")
+            # Could switch to local fallback here
+
+    def start(self):
+        """Start remote transcription."""
+        if self.is_running:
+            return
+
+        self.is_running = True
+
+        if self.use_remote and self.server_url and self.api_key:
+            self.client = RemoteTranscriptionClient(
+                server_url=self.server_url,
+                api_key=self.api_key,
+                on_transcription=self._handle_transcription,
+                on_error=self._handle_error,
+                on_connection_change=self._handle_connection_change
+            )
+            self.client.start()
+
+    def stop(self):
+        """Stop remote transcription."""
+        self.is_running = False
+        if self.client:
+            self.client.stop()
+            self.client = None
+
+    def send_audio(self, audio_data: np.ndarray):
+        """Send audio for transcription."""
+        if self.client and self.client.connected:
+            self.client.send_audio(audio_data)
+        elif self.local_engine:
+            # Fallback to local processing
+            pass  # Local engine handles its own audio capture
+
+    @property
+    def is_connected(self) -> bool:
+        """Check if remote service is connected."""
+        return self.client is not None and self.client.connected

client/server_sync.py

@@ -2,7 +2,9 @@
 
 import requests
 import json
-from typing import Optional
+import base64
+from pathlib import Path
+from typing import Optional, List
 from datetime import datetime
 import threading
 import queue
@@ -10,22 +12,41 @@ from concurrent.futures import ThreadPoolExecutor
 
 
 class ServerSyncClient:
-    """Client for syncing transcriptions to a PHP server."""
+    """Client for syncing transcriptions to a multi-user server."""
 
-    def __init__(self, url: str, room: str, passphrase: str, user_name: str):
+    def __init__(self, url: str, room: str, passphrase: str, user_name: str,
+                 fonts_dir: Optional[Path] = None,
+                 font_source: str = "None",
+                 websafe_font: Optional[str] = None,
+                 google_font: Optional[str] = None,
+                 custom_font_file: Optional[str] = None):
         """
         Initialize server sync client.
 
         Args:
-            url: Server URL (e.g., http://example.com/transcription/server.php)
+            url: Server URL (e.g., http://example.com/api/send)
             room: Room name
             passphrase: Room passphrase
             user_name: User's display name
+            fonts_dir: Optional directory containing custom fonts to upload
+            font_source: Font source type ("None", "Web-Safe", "Google Font", "Custom File")
+            websafe_font: Web-safe font name (e.g., "Arial", "Times New Roman")
+            google_font: Google Font name (e.g., "Roboto", "Open Sans")
+            custom_font_file: Path to a custom font file for this speaker
         """
         self.url = url
         self.room = room
         self.passphrase = passphrase
         self.user_name = user_name
+        self.fonts_dir = fonts_dir
+        self.font_source = font_source
+        self.websafe_font = websafe_font
+        self.google_font = google_font
+        self.custom_font_file = custom_font_file
+
+        # Font info to send with transcriptions
+        self.font_family: Optional[str] = None
+        self.font_type: Optional[str] = None  # "websafe", "google", "custom"
 
         # Queue for sending transcriptions asynchronously
         self.send_queue = queue.Queue()
@@ -50,6 +71,153 @@ class ServerSyncClient:
         self.send_thread.start()
         print(f"Server sync started: room={self.room}")
 
+        # Set up font based on source type
+        if self.font_source == "Web-Safe" and self.websafe_font:
+            self.font_family = self.websafe_font
+            self.font_type = "websafe"
+            print(f"Using web-safe font: {self.font_family}")
+        elif self.font_source == "Google Font" and self.google_font:
+            self.font_family = self.google_font
+            self.font_type = "google"
+            print(f"Using Google Font: {self.font_family}")
+        elif self.font_source == "Custom File" and self.custom_font_file:
+            self._upload_custom_font()
+        # Legacy fallback: upload all fonts from fonts_dir if available
+        elif self.fonts_dir:
+            self._upload_fonts()
+
+    def _upload_custom_font(self):
+        """Upload the user's custom font file to the server for per-speaker fonts."""
+        if not self.custom_font_file:
+            return
+
+        font_path = Path(self.custom_font_file)
+        if not font_path.exists():
+            print(f"Custom font file not found: {self.custom_font_file}")
+            return
+
+        # Validate extension
+        font_extensions = {'.ttf', '.otf', '.woff', '.woff2'}
+        if font_path.suffix.lower() not in font_extensions:
+            print(f"Invalid font file type: {font_path.suffix}")
+            return
+
+        mime_types = {
+            '.ttf': 'font/ttf',
+            '.otf': 'font/otf',
+            '.woff': 'font/woff',
+            '.woff2': 'font/woff2'
+        }
+
+        try:
+            # Read and encode font data
+            with open(font_path, 'rb') as f:
+                font_data = base64.b64encode(f.read()).decode('utf-8')
+
+            # Font family name is filename without extension
+            self.font_family = font_path.stem
+            font_filename = font_path.name
+
+            print(f"Uploading custom font: {font_filename} (family: {self.font_family})")
+
+            # Upload to server
+            from urllib.parse import urlparse
+            parsed = urlparse(self.url)
+            base_url = f"{parsed.scheme}://{parsed.netloc}"
+            fonts_url = f"{base_url}/api/fonts"
+
+            response = requests.post(
+                fonts_url,
+                json={
+                    'room': self.room,
+                    'passphrase': self.passphrase,
+                    'fonts': [{
+                        'name': font_filename,
+                        'data': font_data,
+                        'mime': mime_types.get(font_path.suffix.lower(), 'font/ttf')
+                    }]
+                },
+                timeout=30.0
+            )
+
+            if response.status_code == 200:
+                result = response.json()
+                self.font_type = "custom"
+                print(f"Custom font uploaded: {self.font_family}")
+            else:
+                print(f"Custom font upload failed: {response.status_code}")
+                self.font_family = None
+                self.font_type = None
+
+        except Exception as e:
+            print(f"Error uploading custom font: {e}")
+            self.font_family = None
+            self.font_type = None
+
+    def _upload_fonts(self):
+        """Upload custom fonts to the server."""
+        if not self.fonts_dir or not self.fonts_dir.exists():
+            return
+
+        # Find font files
+        font_extensions = {'.ttf', '.otf', '.woff', '.woff2'}
+        font_files = [f for f in self.fonts_dir.iterdir()
+                      if f.is_file() and f.suffix.lower() in font_extensions]
+
+        if not font_files:
+            return
+
+        # Prepare font data
+        fonts = []
+        mime_types = {
+            '.ttf': 'font/ttf',
+            '.otf': 'font/otf',
+            '.woff': 'font/woff',
+            '.woff2': 'font/woff2'
+        }
+
+        for font_file in font_files:
+            try:
+                with open(font_file, 'rb') as f:
+                    font_data = base64.b64encode(f.read()).decode('utf-8')
+                fonts.append({
+                    'name': font_file.name,
+                    'data': font_data,
+                    'mime': mime_types.get(font_file.suffix.lower(), 'font/ttf')
+                })
+                print(f"Prepared font for upload: {font_file.name}")
+            except Exception as e:
+                print(f"Error reading font file {font_file}: {e}")
+
+        if not fonts:
+            return
+
+        # Upload to server
+        try:
+            # Extract base URL for fonts endpoint
+            from urllib.parse import urlparse
+            parsed = urlparse(self.url)
+            base_url = f"{parsed.scheme}://{parsed.netloc}"
+            fonts_url = f"{base_url}/api/fonts"
+
+            response = requests.post(
+                fonts_url,
+                json={
+                    'room': self.room,
+                    'passphrase': self.passphrase,
+                    'fonts': fonts
+                },
+                timeout=30.0  # Longer timeout for font uploads
+            )
+
+            if response.status_code == 200:
+                result = response.json()
+                print(f"Fonts uploaded successfully: {result.get('message', '')}")
+            else:
+                print(f"Font upload failed: {response.status_code}")
+        except Exception as e:
+            print(f"Error uploading fonts: {e}")
+
     def stop(self):
         """Stop the sync client."""
         self.is_running = False
@@ -59,13 +227,14 @@ class ServerSyncClient:
         self.executor.shutdown(wait=False)  # Don't wait - let pending requests finish in background
         print("Server sync stopped")
 
-    def send_transcription(self, text: str, timestamp: Optional[datetime] = None):
+    def send_transcription(self, text: str, timestamp: Optional[datetime] = None, is_preview: bool = False):
         """
         Send a transcription to the server (non-blocking).
 
         Args:
             text: Transcription text
             timestamp: Timestamp (defaults to now)
+            is_preview: Whether this is a preview transcription
         """
         if timestamp is None:
             timestamp = datetime.now()
@@ -78,9 +247,20 @@ class ServerSyncClient:
         self.send_queue.put({
             'text': text,
             'timestamp': timestamp.strftime("%H:%M:%S"),
+            'is_preview': is_preview,
             'queue_time': queue_time  # For debugging
         })
 
+    def send_preview(self, text: str, timestamp: Optional[datetime] = None):
+        """
+        Send a preview transcription to the server (non-blocking).
+
+        Args:
+            text: Preview transcription text
+            timestamp: Timestamp (defaults to now)
+        """
+        self.send_transcription(text, timestamp, is_preview=True)
+
     def _send_loop(self):
         """Background thread for sending transcriptions."""
         while self.is_running:
@@ -122,28 +302,25 @@ class ServerSyncClient:
                 'passphrase': self.passphrase,
                 'user_name': self.user_name,
                 'text': trans_data['text'],
-                'timestamp': trans_data['timestamp']
+                'timestamp': trans_data['timestamp'],
+                'is_preview': trans_data.get('is_preview', False)
             }
 
-            # Detect server type and send appropriately
-            # PHP servers have "server.php" in URL and need ?action=send
-            # Node.js servers have "/api/send" in URL and don't need it
-            request_start = time.time()
-            if 'server.php' in self.url:
-                # PHP server - add action parameter
-                response = requests.post(
-                    self.url,
-                    params={'action': 'send'},
-                    json=payload,
-                    timeout=2.0  # Reduced timeout for faster failure detection
-                )
+            # Add font info if user has a custom font configured
+            if self.font_family:
+                payload['font_family'] = self.font_family
+                payload['font_type'] = self.font_type  # "websafe", "google", or "custom"
+                print(f"[Server Sync] Sending with font: {self.font_family} ({self.font_type})")
             else:
-                # Node.js server - no action parameter
-                response = requests.post(
-                    self.url,
-                    json=payload,
-                    timeout=2.0  # Reduced timeout for faster failure detection
-                )
+                print(f"[Server Sync] No font configured (font_source={self.font_source})")
+
+            # Send to Node.js server
+            request_start = time.time()
+            response = requests.post(
+                self.url,
+                json=payload,
+                timeout=2.0  # Reduced timeout for faster failure detection
+            )
 
             request_time = (time.time() - request_start) * 1000
             print(f"[Server Sync] HTTP request: {request_time:.0f}ms, Status: {response.status_code}")

client/transcription_engine_realtime.py

@@ -29,7 +29,7 @@ class TranscriptionResult:
     def __repr__(self) -> str:
         time_str = self.timestamp.strftime("%H:%M:%S")
         prefix = "[FINAL]" if self.is_final else "[PREVIEW]"
-        if self.user_name:
+        if self.user_name and self.user_name.strip():
             return f"{prefix} [{time_str}] {self.user_name}: {self.text}"
         return f"{prefix} [{time_str}] {self.text}"
 
@@ -63,6 +63,7 @@ class RealtimeTranscriptionEngine:
         # Realtime preview settings
         enable_realtime_transcription: bool = False,
         realtime_model: str = "tiny.en",
+        realtime_processing_pause: float = 0.1,  # How often to update preview (lower = more frequent)
         # VAD settings
         silero_sensitivity: float = 0.4,
         silero_use_onnx: bool = True,
@@ -106,11 +107,21 @@ class RealtimeTranscriptionEngine:
             user_name: User name for transcriptions
         """
         self.model = model
-        self.device = device
         self.language = language
         self.compute_type = compute_type
+
+        # Resolve device - 'auto' means use CUDA if available, else CPU
+        if device == 'auto':
+            try:
+                import torch
+                self.device = 'cuda' if torch.cuda.is_available() else 'cpu'
+            except:
+                self.device = 'cpu'
+        else:
+            self.device = device
         self.enable_realtime = enable_realtime_transcription
         self.realtime_model = realtime_model
+        self.realtime_processing_pause = realtime_processing_pause
         self.user_name = user_name
 
         # Callbacks
@@ -131,6 +142,7 @@ class RealtimeTranscriptionEngine:
         # Store configuration for recorder initialization
         self.config = {
             'model': model,
+            'device': self.device,  # Use resolved device (auto -> cuda/cpu)
             'language': language if language != 'auto' else None,
             'compute_type': compute_type if compute_type != 'default' else 'default',
             'input_device_index': input_device_index,
@@ -145,8 +157,18 @@ class RealtimeTranscriptionEngine:
             'initial_prompt': initial_prompt if initial_prompt else None,
             'enable_realtime_transcription': enable_realtime_transcription,
             'realtime_model_type': realtime_model if enable_realtime_transcription else None,
+            'realtime_processing_pause': realtime_processing_pause if enable_realtime_transcription else 0.2,
+            # The realtime callback is added during initialize() after set_callbacks is called
         }
 
+    def _is_cuda_available(self) -> bool:
+        """Check if CUDA is available."""
+        try:
+            import torch
+            return torch.cuda.is_available()
+        except:
+            return False
+
     def set_callbacks(
         self,
         realtime_callback: Optional[Callable[[TranscriptionResult], None]] = None,
@@ -198,8 +220,15 @@ class RealtimeTranscriptionEngine:
 
             try:
                 print(f"Initializing RealtimeSTT with model: {self.model}")
+                print(f"  Device: {self.device}, Compute type: {self.compute_type}")
                 if self.enable_realtime:
                     print(f"  Realtime preview enabled with model: {self.realtime_model}")
+                    print(f"  Realtime processing pause: {self.realtime_processing_pause}s")
+
+                # Add realtime transcription callback if enabled
+                # This provides word-by-word updates as speech is being processed
+                if self.enable_realtime:
+                    self.config['on_realtime_transcription_update'] = self._on_realtime_transcription
 
                 # Create recorder with configuration
                 self.recorder = AudioToTextRecorder(**self.config)
@@ -325,7 +354,7 @@ class RealtimeTranscriptionEngine:
         Returns:
             True if model changed successfully
         """
-        was_running = self.is_running
+        was_running = self.is_recording
 
         # Stop current recording
         self.stop()
@@ -355,7 +384,7 @@ class RealtimeTranscriptionEngine:
         Returns:
             True if device changed successfully
         """
-        was_running = self.is_running
+        was_running = self.is_recording
 
         # Stop current recording
         self.stop()
@@ -396,7 +425,7 @@ class RealtimeTranscriptionEngine:
         self.config['webrtc_sensitivity'] = webrtc_sensitivity
 
         # If running, need to restart to apply changes
-        if self.is_running:
+        if self.is_recording:
             print("VAD settings updated. Restart transcription to apply changes.")
 
     def set_user_name(self, user_name: str):
@@ -404,7 +433,7 @@ class RealtimeTranscriptionEngine:
         self.user_name = user_name
 
     def __repr__(self) -> str:
-        return f"RealtimeTranscriptionEngine(model={self.model}, device={self.device}, running={self.is_running})"
+        return f"RealtimeTranscriptionEngine(model={self.model}, device={self.device}, running={self.is_recording})"
 
     def __del__(self):
         """Cleanup when object is destroyed."""

config/default_config.yaml

@@ -16,6 +16,7 @@ transcription:
   # Realtime preview settings (optional faster preview before final transcription)
   enable_realtime_transcription: false
   realtime_model: "tiny.en"  # Faster model for instant preview
+  realtime_processing_pause: 0.1  # Seconds between preview updates (lower = more responsive, default 0.1)
 
   # VAD (Voice Activity Detection) settings
   silero_sensitivity: 0.4  # 0.0-1.0, lower = more sensitive (detects more speech)
@@ -35,16 +36,26 @@ transcription:
   # Performance settings
   no_log_file: true  # Disable RealtimeSTT logging
 
+  # Fast speaker mode - for speakers who talk quickly without pauses
+  # Reduces silence detection thresholds for more frequent transcription outputs
+  continuous_mode: false
+
 server_sync:
   enabled: false
   url: "http://localhost:3000/api/send"
   room: "default"
   passphrase: ""
+  # Font settings are now in the display section (shared for local and server sync)
 
 display:
   show_timestamps: true
   max_lines: 100
-  font_family: "Courier"
+  # Font settings (used for both local display and server sync)
+  font_source: "System Font"  # Options: System Font, Web-Safe, Google Font, Custom File
+  font_family: "Courier"  # System font name (local only, won't work with server sync)
+  websafe_font: "Arial"  # Web-safe font name
+  google_font: "Roboto"  # Google Font name
+  custom_font_file: ""  # Path to custom font file (.ttf, .otf, .woff, .woff2)
   font_size: 12
   theme: "dark"
   fade_after_seconds: 10  # Time before transcriptions fade out (0 = never fade)
@@ -52,3 +63,9 @@ display:
 web_server:
   port: 8080
   host: "127.0.0.1"
+
+remote_processing:
+  enabled: false  # Enable remote transcription offloading
+  server_url: ""  # WebSocket URL of remote transcription service (e.g., ws://your-server:8765/ws/transcribe)
+  api_key: ""  # API key for authentication
+  fallback_to_local: true  # Fall back to local processing if remote fails

gui/main_window_qt.py

@@ -9,16 +9,16 @@ from PySide6.QtGui import QFont
 from pathlib import Path
 import sys
 
-# Add parent directory to path for imports
-sys.path.append(str(Path(__file__).parent.parent))
+# Add parent directory to path for imports (resolve symlinks)
+sys.path.append(str(Path(__file__).resolve().parent.parent))
 
 from client.config import Config
 from client.device_utils import DeviceManager
 from client.transcription_engine_realtime import RealtimeTranscriptionEngine, TranscriptionResult
 from client.server_sync import ServerSyncClient
-from gui.transcription_display_qt import TranscriptionDisplay
 from gui.settings_dialog_qt import SettingsDialog
 from server.web_display import TranscriptionWebServer
+from version import __version__
 import asyncio
 from threading import Thread
 
@@ -96,9 +96,13 @@ class MainWindow(QMainWindow):
         # Server sync components
         self.server_sync_client: ServerSyncClient = None
 
+        # Store all transcriptions for saving (separate from display)
+        self.transcriptions: list = []
+
         # Configure window
         self.setWindowTitle("Local Transcription")
-        self.resize(900, 700)
+        self.resize(700, 300)
+        self.setMinimumSize(600, 280)
 
         # Set application icon
         # In PyInstaller frozen executables, use _MEIPASS for bundled files
@@ -108,7 +112,7 @@ class MainWindow(QMainWindow):
             icon_path = Path(sys._MEIPASS) / "LocalTranscription.png"
         else:
             # Running in normal Python
-            icon_path = Path(__file__).parent.parent / "LocalTranscription.png"
+            icon_path = Path(__file__).resolve().parent.parent / "LocalTranscription.png"
 
         if icon_path.exists():
             from PySide6.QtGui import QIcon
@@ -174,13 +178,14 @@ class MainWindow(QMainWindow):
 
         # Status bar
         status_widget = QWidget()
-        status_widget.setFixedHeight(60)
+        status_widget.setFixedHeight(40)
         status_layout = QHBoxLayout()
+        status_layout.setContentsMargins(0, 0, 0, 0)
         status_widget.setLayout(status_layout)
 
         self.status_label = QLabel("⚫ Initializing...")
         status_font = QFont()
-        status_font.setPointSize(14)
+        status_font.setPointSize(12)
         self.status_label.setFont(status_font)
         status_layout.addWidget(self.status_label)
 
@@ -193,28 +198,36 @@ class MainWindow(QMainWindow):
         self.user_label = QLabel(f"User: {user_name}")
         status_layout.addWidget(self.user_label)
 
-        # Web display link
-        web_host = self.config.get('web_server.host', '127.0.0.1')
-        web_port = self.config.get('web_server.port', 8080)
-        web_url = f"http://{web_host}:{web_port}"
-        self.web_link = QLabel(f'<a href="{web_url}">🌐 Open Web Display</a>')
-        self.web_link.setOpenExternalLinks(True)
-        self.web_link.setToolTip(f"Click to open {web_url} in browser (for OBS)")
-        self.web_link.setStyleSheet("QLabel { color: #4CAF50; }")
-        status_layout.addWidget(self.web_link)
-
         status_layout.addStretch()
 
         main_layout.addWidget(status_widget)
 
-        # Transcription display
-        self.transcription_display = TranscriptionDisplay(
-            max_lines=self.config.get('display.max_lines', 100),
-            show_timestamps=self.config.get('display.show_timestamps', True),
-            font_family=self.config.get('display.font_family', 'Courier'),
-            font_size=self.config.get('display.font_size', 12)
-        )
-        main_layout.addWidget(self.transcription_display)
+        # Web display links section
+        links_widget = QWidget()
+        links_layout = QVBoxLayout()
+        links_layout.setContentsMargins(0, 5, 0, 5)
+        links_layout.setSpacing(5)
+        links_widget.setLayout(links_layout)
+
+        # Local web display link
+        web_host = self.config.get('web_server.host', '127.0.0.1')
+        web_port = self.config.get('web_server.port', 8080)
+        web_url = f"http://{web_host}:{web_port}"
+        self.web_link = QLabel(f'🌐 Local Web Display: <a href="{web_url}">{web_url}</a>')
+        self.web_link.setOpenExternalLinks(True)
+        self.web_link.setToolTip("Click to open in browser (for OBS)")
+        self.web_link.setStyleSheet("QLabel a { color: #4CAF50; }")
+        links_layout.addWidget(self.web_link)
+
+        # Multi-user sync display link (shown when server sync is enabled)
+        self.sync_link = QLabel("")
+        self.sync_link.setOpenExternalLinks(True)
+        self.sync_link.setStyleSheet("QLabel a { color: #2196F3; }")
+        self.sync_link.setVisible(False)
+        links_layout.addWidget(self.sync_link)
+        self._update_sync_link()
+
+        main_layout.addWidget(links_widget)
 
         # Control buttons
         control_widget = QWidget()
@@ -232,7 +245,7 @@ class MainWindow(QMainWindow):
         self.start_button.setStyleSheet("background-color: #2ecc71; color: white;")
         control_layout.addWidget(self.start_button)
 
-        self.clear_button = QPushButton("Clear")
+        self.clear_button = QPushButton("🗑 Clear")
         self.clear_button.setFixedSize(120, 50)
         self.clear_button.clicked.connect(self._clear_transcriptions)
         control_layout.addWidget(self.clear_button)
@@ -246,6 +259,12 @@ class MainWindow(QMainWindow):
 
         main_layout.addWidget(control_widget)
 
+        # Version label (bottom right)
+        version_label = QLabel(f"v{__version__}")
+        version_label.setStyleSheet("QLabel { color: #666; font-size: 10px; }")
+        version_label.setAlignment(Qt.AlignRight)
+        main_layout.addWidget(version_label)
+
     def _initialize_components(self):
         """Initialize RealtimeSTT transcription engine."""
         # Update status
@@ -271,6 +290,20 @@ class MainWindow(QMainWindow):
 
         user_name = self.config.get('user.name', 'User')
 
+        # Check for continuous/fast speaker mode
+        continuous_mode = self.config.get('transcription.continuous_mode', False)
+
+        # Get timing settings - use faster values if continuous mode is enabled
+        if continuous_mode:
+            # Faster settings for speakers who talk without pauses
+            post_speech_silence = 0.15  # Reduced from default 0.3
+            min_gap = 0.0  # No gap between recordings
+            min_recording = 0.3  # Shorter minimum recording
+        else:
+            post_speech_silence = self.config.get('transcription.post_speech_silence_duration', 0.3)
+            min_gap = self.config.get('transcription.min_gap_between_recordings', 0.0)
+            min_recording = self.config.get('transcription.min_length_of_recording', 0.5)
+
         self.transcription_engine = RealtimeTranscriptionEngine(
             model=model,
             device=device,
@@ -278,12 +311,13 @@ class MainWindow(QMainWindow):
             compute_type=compute_type,
             enable_realtime_transcription=self.config.get('transcription.enable_realtime_transcription', False),
             realtime_model=self.config.get('transcription.realtime_model', 'tiny.en'),
+            realtime_processing_pause=self.config.get('transcription.realtime_processing_pause', 0.1),
             silero_sensitivity=self.config.get('transcription.silero_sensitivity', 0.4),
             silero_use_onnx=self.config.get('transcription.silero_use_onnx', True),
             webrtc_sensitivity=self.config.get('transcription.webrtc_sensitivity', 3),
-            post_speech_silence_duration=self.config.get('transcription.post_speech_silence_duration', 0.3),
-            min_length_of_recording=self.config.get('transcription.min_length_of_recording', 0.5),
-            min_gap_between_recordings=self.config.get('transcription.min_gap_between_recordings', 0.0),
+            post_speech_silence_duration=post_speech_silence,
+            min_length_of_recording=min_recording,
+            min_gap_between_recordings=min_gap,
             pre_recording_buffer_duration=self.config.get('transcription.pre_recording_buffer_duration', 0.2),
             beam_size=self.config.get('transcription.beam_size', 5),
             initial_prompt=self.config.get('transcription.initial_prompt', ''),
@@ -332,6 +366,12 @@ class MainWindow(QMainWindow):
             max_lines = self.config.get('display.max_lines', 50)
             font_family = self.config.get('display.font_family', 'Arial')
             font_size = self.config.get('display.font_size', 16)
+            fonts_dir = self.config.fonts_dir  # Custom fonts directory
+
+            # Font source settings
+            font_source = self.config.get('display.font_source', 'System Font')
+            websafe_font = self.config.get('display.websafe_font', 'Arial')
+            google_font = self.config.get('display.google_font', 'Roboto')
 
             # Try up to 5 ports if the default is in use
             ports_to_try = [port] + [port + i for i in range(1, 5)]
@@ -346,7 +386,11 @@ class MainWindow(QMainWindow):
                     fade_after_seconds=fade_after_seconds,
                     max_lines=max_lines,
                     font_family=font_family,
-                    font_size=font_size
+                    font_size=font_size,
+                    fonts_dir=fonts_dir,
+                    font_source=font_source,
+                    websafe_font=websafe_font,
+                    google_font=google_font
                 )
                 self.web_server_thread = WebServerThread(self.web_server)
                 self.web_server_thread.start()
@@ -450,15 +494,21 @@ class MainWindow(QMainWindow):
             return
 
         try:
-            # Update display with preview (thread-safe Qt call)
-            from PySide6.QtCore import QMetaObject, Q_ARG
-            QMetaObject.invokeMethod(
-                self.transcription_display,
-                "add_transcription",
-                Qt.QueuedConnection,
-                Q_ARG(str, f"[PREVIEW] {result.text}"),
-                Q_ARG(str, result.user_name)
-            )
+            # Broadcast preview to local web server
+            if self.web_server and self.web_server_thread and self.web_server_thread.loop:
+                asyncio.run_coroutine_threadsafe(
+                    self.web_server.broadcast_preview(
+                        result.text,
+                        result.user_name,
+                        result.timestamp
+                    ),
+                    self.web_server_thread.loop
+                )
+
+            # Send preview to server sync if enabled
+            if self.server_sync_client:
+                self.server_sync_client.send_preview(result.text, result.timestamp)
+
         except Exception as e:
             print(f"Error handling realtime transcription: {e}")
 
@@ -468,15 +518,8 @@ class MainWindow(QMainWindow):
             return
 
         try:
-            # Update display (thread-safe Qt call)
-            from PySide6.QtCore import QMetaObject, Q_ARG
-            QMetaObject.invokeMethod(
-                self.transcription_display,
-                "add_transcription",
-                Qt.QueuedConnection,
-                Q_ARG(str, result.text),
-                Q_ARG(str, result.user_name)
-            )
+            # Store transcription for saving
+            self.transcriptions.append(result)
 
             # Broadcast to web server if enabled
             if self.web_server and self.web_server_thread:
@@ -508,18 +551,27 @@ class MainWindow(QMainWindow):
 
     def _clear_transcriptions(self):
         """Clear all transcriptions."""
+        if not self.transcriptions:
+            QMessageBox.information(self, "No Transcriptions", "There are no transcriptions to clear.")
+            return
+
         reply = QMessageBox.question(
             self,
             "Clear Transcriptions",
-            "Are you sure you want to clear all transcriptions?",
+            f"Are you sure you want to clear {len(self.transcriptions)} transcription(s)?",
             QMessageBox.Yes | QMessageBox.No
         )
 
         if reply == QMessageBox.Yes:
-            self.transcription_display.clear_all()
+            self.transcriptions.clear()
+            QMessageBox.information(self, "Cleared", "All transcriptions have been cleared.")
 
     def _save_transcriptions(self):
         """Save transcriptions to file."""
+        if not self.transcriptions:
+            QMessageBox.warning(self, "No Transcriptions", "There are no transcriptions to save.")
+            return
+
         filepath, _ = QFileDialog.getSaveFileName(
             self,
             "Save Transcriptions",
@@ -528,10 +580,21 @@ class MainWindow(QMainWindow):
         )
 
         if filepath:
-            if self.transcription_display.save_to_file(filepath):
+            try:
+                show_timestamps = self.config.get('display.show_timestamps', True)
+                with open(filepath, 'w', encoding='utf-8') as f:
+                    for result in self.transcriptions:
+                        line_parts = []
+                        if show_timestamps:
+                            time_str = result.timestamp.strftime("%H:%M:%S")
+                            line_parts.append(f"[{time_str}]")
+                        if result.user_name and result.user_name.strip():
+                            line_parts.append(f"{result.user_name}:")
+                        line_parts.append(result.text)
+                        f.write(" ".join(line_parts) + "\n")
                 QMessageBox.information(self, "Saved", f"Transcriptions saved to:\n{filepath}")
-            else:
-                QMessageBox.critical(self, "Error", "Failed to save transcriptions")
+            except Exception as e:
+                QMessageBox.critical(self, "Error", f"Failed to save transcriptions:\n{e}")
 
     def _open_settings(self):
         """Open settings dialog."""
@@ -569,22 +632,20 @@ class MainWindow(QMainWindow):
         user_name = self.config.get('user.name', 'User')
         self.user_label.setText(f"User: {user_name}")
 
-        # Update display settings
-        show_timestamps = self.config.get('display.show_timestamps', True)
-        self.transcription_display.set_max_lines(self.config.get('display.max_lines', 100))
-        self.transcription_display.set_show_timestamps(show_timestamps)
-        self.transcription_display.set_font(
-            self.config.get('display.font_family', 'Courier'),
-            self.config.get('display.font_size', 12)
-        )
-
         # Update web server settings
         if self.web_server:
-            self.web_server.show_timestamps = show_timestamps
+            self.web_server.show_timestamps = self.config.get('display.show_timestamps', True)
             self.web_server.fade_after_seconds = self.config.get('display.fade_after_seconds', 10)
             self.web_server.max_lines = self.config.get('display.max_lines', 50)
             self.web_server.font_family = self.config.get('display.font_family', 'Arial')
             self.web_server.font_size = self.config.get('display.font_size', 16)
+            # Update font source settings
+            self.web_server.font_source = self.config.get('display.font_source', 'System Font')
+            self.web_server.websafe_font = self.config.get('display.websafe_font', 'Arial')
+            self.web_server.google_font = self.config.get('display.google_font', 'Roboto')
+
+        # Update sync link visibility based on server sync settings
+        self._update_sync_link()
 
         # Restart server sync if it was running and settings changed
         if self.is_transcribing and self.server_sync_client:
@@ -656,18 +717,33 @@ class MainWindow(QMainWindow):
             room = self.config.get('server_sync.room', 'default')
             passphrase = self.config.get('server_sync.passphrase', '')
             user_name = self.config.get('user.name', 'User')
+            fonts_dir = self.config.fonts_dir  # Custom fonts directory
+
+            # Font settings (shared with display settings)
+            # Note: "System Font" only works locally, so we treat it as "None" for server sync
+            font_source = self.config.get('display.font_source', 'System Font')
+            if font_source == "System Font":
+                font_source = "None"  # System fonts don't work on remote displays
+            websafe_font = self.config.get('display.websafe_font', '')
+            google_font = self.config.get('display.google_font', '')
+            custom_font_file = self.config.get('display.custom_font_file', '')
 
             if not url:
                 print("Server sync enabled but no URL configured")
                 return
 
-            print(f"Starting server sync: {url}, room: {room}, user: {user_name}")
+            print(f"Starting server sync: {url}, room: {room}, user: {user_name}, font: {font_source}")
 
             self.server_sync_client = ServerSyncClient(
                 url=url,
                 room=room,
                 passphrase=passphrase,
-                user_name=user_name
+                user_name=user_name,
+                fonts_dir=fonts_dir,
+                font_source=font_source,
+                websafe_font=websafe_font if websafe_font else None,
+                google_font=google_font if google_font else None,
+                custom_font_file=custom_font_file if custom_font_file else None
             )
             self.server_sync_client.start()
 
@@ -679,6 +755,40 @@ class MainWindow(QMainWindow):
                 f"Failed to start server sync:\n{e}\n\nTranscription will continue locally."
             )
 
+    def _update_sync_link(self):
+        """Update the multi-user sync link visibility and URL."""
+        server_sync_enabled = self.config.get('server_sync.enabled', False)
+        server_url = self.config.get('server_sync.url', '')
+        room = self.config.get('server_sync.room', 'default')
+
+        if server_sync_enabled and server_url:
+            # Extract base URL from the API endpoint (e.g., http://server:3000/api/send -> http://server:3000)
+            try:
+                from urllib.parse import urlparse, urlencode
+                parsed = urlparse(server_url)
+                base_url = f"{parsed.scheme}://{parsed.netloc}"
+
+                # Get display settings to pass as URL parameters
+                params = {
+                    'room': room,
+                    'fontfamily': self.config.get('display.font_family', 'Arial'),
+                    'fontsize': self.config.get('display.font_size', 16),
+                    'fade': self.config.get('display.fade_after_seconds', 10),
+                    'timestamps': 'true' if self.config.get('display.show_timestamps', True) else 'false',
+                    'maxlines': self.config.get('display.max_lines', 50)
+                }
+                display_url = f"{base_url}/display?{urlencode(params)}"
+                # Show shorter text with just address and room
+                display_text = f"{base_url} (room: {room})"
+                self.sync_link.setText(f'🔗 Multi-User Display: <a href="{display_url}">{display_text}</a>')
+                self.sync_link.setToolTip(f"Click to open: {display_url}")
+                self.sync_link.setVisible(True)
+            except Exception as e:
+                print(f"Error parsing server URL: {e}")
+                self.sync_link.setVisible(False)
+        else:
+            self.sync_link.setVisible(False)
+
     def closeEvent(self, event):
         """Handle window closing."""
         # Stop transcription if running

gui/settings_dialog_qt.py

@@ -3,10 +3,11 @@
 from PySide6.QtWidgets import (
     QDialog, QVBoxLayout, QHBoxLayout, QFormLayout,
     QLabel, QLineEdit, QComboBox, QCheckBox, QSlider,
-    QPushButton, QMessageBox, QGroupBox, QScrollArea, QWidget
+    QPushButton, QMessageBox, QGroupBox, QScrollArea, QWidget,
+    QFileDialog
 )
 from PySide6.QtCore import Qt
-from PySide6.QtGui import QScreen
+from PySide6.QtGui import QScreen, QFontDatabase
 from typing import Callable, List, Tuple
 
 
@@ -179,6 +180,16 @@ class SettingsDialog(QDialog):
         self.realtime_model_combo.addItems(["tiny", "tiny.en", "base", "base.en"])
         realtime_layout.addRow("Preview Model:", self.realtime_model_combo)
 
+        self.realtime_pause_input = QLineEdit()
+        self.realtime_pause_input.setToolTip(
+            "Seconds between preview updates:\n"
+            "• Lower values = More responsive, more frequent updates\n"
+            "• Higher values = Less CPU usage, updates less often\n"
+            "• 0.1 is recommended for real-time streaming\n"
+            "• Try 0.05 for even faster updates"
+        )
+        realtime_layout.addRow("Preview Update Interval (s):", self.realtime_pause_input)
+
         realtime_group.setLayout(realtime_layout)
         content_layout.addWidget(realtime_group)
 
@@ -261,6 +272,16 @@ class SettingsDialog(QDialog):
         )
         timing_layout.addRow("Pre-Recording Buffer (s):", self.pre_buffer_input)
 
+        self.continuous_mode_check = QCheckBox()
+        self.continuous_mode_check.setToolTip(
+            "Fast Speaker Mode:\n"
+            "• For speakers who talk quickly without pauses\n"
+            "• Reduces silence detection thresholds\n"
+            "• Produces more frequent transcription outputs\n"
+            "• May result in more fragmented sentences"
+        )
+        timing_layout.addRow("Fast Speaker Mode:", self.continuous_mode_check)
+
         timing_group.setLayout(timing_layout)
         content_layout.addWidget(timing_group)
 
@@ -281,10 +302,79 @@ class SettingsDialog(QDialog):
         )
         display_layout.addRow("Max Lines:", self.maxlines_input)
 
+        # Font source selector (shared for local display and server sync)
+        self.display_font_source_combo = QComboBox()
+        self.display_font_source_combo.addItems(["System Font", "Web-Safe", "Google Font", "Custom File"])
+        self.display_font_source_combo.setToolTip(
+            "Choose font for local display and server sync:\n"
+            "• System Font - Local only (won't work with server sync)\n"
+            "• Web-Safe - Universal fonts (Arial, Comic Sans, etc.)\n"
+            "• Google Font - Free fonts from fonts.google.com\n"
+            "• Custom File - Upload your own font file"
+        )
+        self.display_font_source_combo.currentTextChanged.connect(self._on_display_font_source_changed)
+        display_layout.addRow("Font Source:", self.display_font_source_combo)
+
+        # System font selector
         self.font_family_combo = QComboBox()
-        self.font_family_combo.setToolTip("Font family for transcription display")
-        self.font_family_combo.addItems(["Courier", "Arial", "Times New Roman", "Consolas", "Monaco", "Monospace"])
-        display_layout.addRow("Font Family:", self.font_family_combo)
+        self.font_family_combo.setToolTip("Font family for transcription display (system fonts)")
+        self.font_family_combo.setEditable(True)
+        self.font_family_combo.setMaxVisibleItems(20)
+        system_fonts = QFontDatabase.families()
+        common_fonts = ["Courier", "Arial", "Times New Roman", "Consolas", "Monaco", "Monospace"]
+        ordered_fonts = []
+        for font in common_fonts:
+            if font in system_fonts:
+                ordered_fonts.append(font)
+        for font in sorted(system_fonts):
+            if font not in ordered_fonts:
+                ordered_fonts.append(font)
+        self.font_family_combo.addItems(ordered_fonts)
+        display_layout.addRow("System Font:", self.font_family_combo)
+
+        # Web-safe font selector for display
+        self.display_websafe_combo = QComboBox()
+        display_websafe_fonts = [
+            "Arial", "Arial Black", "Comic Sans MS", "Courier New",
+            "Georgia", "Impact", "Lucida Console", "Lucida Sans Unicode",
+            "Palatino Linotype", "Tahoma", "Times New Roman", "Trebuchet MS", "Verdana"
+        ]
+        self.display_websafe_combo.addItems(display_websafe_fonts)
+        self.display_websafe_combo.setToolTip("Web-safe fonts work on all systems")
+        display_layout.addRow("Web-Safe Font:", self.display_websafe_combo)
+
+        # Google Font selector for display
+        self.display_google_font_combo = QComboBox()
+        display_google_fonts = [
+            "Roboto", "Open Sans", "Lato", "Montserrat", "Poppins",
+            "Nunito", "Raleway", "Ubuntu", "Rubik", "Work Sans",
+            "Inter", "Outfit", "Quicksand", "Comfortaa", "Varela Round",
+            "Playfair Display", "Merriweather", "Lora", "PT Serif", "Crimson Text",
+            "Roboto Mono", "Source Code Pro", "Fira Code", "JetBrains Mono", "IBM Plex Mono",
+            "Bebas Neue", "Oswald", "Righteous", "Bangers", "Permanent Marker",
+            "Pacifico", "Lobster", "Dancing Script", "Caveat", "Satisfy"
+        ]
+        self.display_google_font_combo.addItems(display_google_fonts)
+        self.display_google_font_combo.setToolTip("Select a Google Font for display")
+        display_layout.addRow("Google Font:", self.display_google_font_combo)
+
+        # Custom font file picker (for server sync upload)
+        custom_font_layout = QHBoxLayout()
+        self.display_custom_font_input = QLineEdit()
+        self.display_custom_font_input.setPlaceholderText("No file selected")
+        self.display_custom_font_input.setReadOnly(True)
+        self.display_custom_font_input.setToolTip(
+            "Select a font file to use:\n"
+            "• Supports .ttf, .otf, .woff, .woff2 files\n"
+            "• Font is uploaded to server automatically when using Server Sync"
+        )
+        custom_font_layout.addWidget(self.display_custom_font_input)
+
+        self.display_custom_font_browse = QPushButton("Browse...")
+        self.display_custom_font_browse.clicked.connect(self._browse_display_custom_font)
+        custom_font_layout.addWidget(self.display_custom_font_browse)
+
+        display_layout.addRow("Custom Font File:", custom_font_layout)
 
         self.font_size_input = QLineEdit()
         self.font_size_input.setToolTip("Font size in pixels (12-20 recommended)")
@@ -301,6 +391,9 @@ class SettingsDialog(QDialog):
         display_group.setLayout(display_layout)
         content_layout.addWidget(display_group)
 
+        # Initially show only System Font (default)
+        self._on_display_font_source_changed("System Font")
+
         # Server Sync Group
         server_group = QGroupBox("Multi-User Server Sync (Optional)")
         server_layout = QFormLayout()
@@ -339,9 +432,55 @@ class SettingsDialog(QDialog):
         )
         server_layout.addRow("Passphrase:", self.server_passphrase_input)
 
+        # Note about font settings
+        font_note = QLabel("Font settings are in Display Settings above")
+        font_note.setStyleSheet("color: #666; font-style: italic;")
+        server_layout.addRow("", font_note)
+
         server_group.setLayout(server_layout)
         content_layout.addWidget(server_group)
 
+        # Remote Processing Group
+        remote_group = QGroupBox("Remote Processing (GPU Offload)")
+        remote_layout = QFormLayout()
+        remote_layout.setSpacing(10)
+
+        self.remote_enabled_check = QCheckBox()
+        self.remote_enabled_check.setToolTip(
+            "Enable remote transcription processing:\n"
+            "• Offload transcription to a GPU-equipped server\n"
+            "• Reduces local CPU/GPU usage\n"
+            "• Requires running the remote transcription service"
+        )
+        remote_layout.addRow("Enable Remote Processing:", self.remote_enabled_check)
+
+        self.remote_url_input = QLineEdit()
+        self.remote_url_input.setPlaceholderText("ws://your-server:8765/ws/transcribe")
+        self.remote_url_input.setToolTip(
+            "WebSocket URL of the remote transcription service:\n"
+            "• Format: ws://host:port/ws/transcribe\n"
+            "• Use wss:// for secure connections"
+        )
+        remote_layout.addRow("Server URL:", self.remote_url_input)
+
+        self.remote_api_key_input = QLineEdit()
+        self.remote_api_key_input.setEchoMode(QLineEdit.Password)
+        self.remote_api_key_input.setPlaceholderText("your-api-key")
+        self.remote_api_key_input.setToolTip(
+            "API key for authentication with the remote service"
+        )
+        remote_layout.addRow("API Key:", self.remote_api_key_input)
+
+        self.remote_fallback_check = QCheckBox("Enable")
+        self.remote_fallback_check.setChecked(True)
+        self.remote_fallback_check.setToolTip(
+            "Fall back to local transcription if remote service is unavailable"
+        )
+        remote_layout.addRow("Fallback to Local:", self.remote_fallback_check)
+
+        remote_group.setLayout(remote_layout)
+        content_layout.addWidget(remote_group)
+
         # Add stretch to push everything to the top
         content_layout.addStretch()
 
@@ -367,6 +506,77 @@ class SettingsDialog(QDialog):
         """Update the Silero sensitivity label."""
         self.silero_label.setText(f"{value / 100:.2f}")
 
+    def _open_fonts_folder(self):
+        """Open the custom fonts folder in the system file manager."""
+        import subprocess
+        import sys
+        from pathlib import Path
+
+        fonts_dir = self.config.fonts_dir
+
+        # Ensure the folder exists
+        fonts_dir.mkdir(parents=True, exist_ok=True)
+
+        # Open the folder in the system file manager
+        if sys.platform == 'win32':
+            subprocess.run(['explorer', str(fonts_dir)])
+        elif sys.platform == 'darwin':
+            subprocess.run(['open', str(fonts_dir)])
+        else:
+            # Linux
+            subprocess.run(['xdg-open', str(fonts_dir)])
+
+    def _on_display_font_source_changed(self, source: str):
+        """Show/hide display font inputs based on selected source."""
+        # Hide all font-specific inputs first
+        self.font_family_combo.setVisible(False)
+        self.display_websafe_combo.setVisible(False)
+        self.display_google_font_combo.setVisible(False)
+        self.display_custom_font_input.setVisible(False)
+        self.display_custom_font_browse.setVisible(False)
+
+        # Find the form layout rows and hide/show labels too
+        parent = self.display_font_source_combo.parent()
+        display_layout = parent.layout() if parent else None
+        if display_layout and hasattr(display_layout, 'rowCount'):
+            for i in range(display_layout.rowCount()):
+                label = display_layout.itemAt(i, QFormLayout.LabelRole)
+                field = display_layout.itemAt(i, QFormLayout.FieldRole)
+                if label and field:
+                    label_widget = label.widget()
+                    if label_widget:
+                        label_text = label_widget.text()
+                        if label_text == "System Font:":
+                            label_widget.setVisible(source == "System Font")
+                        elif label_text == "Web-Safe Font:":
+                            label_widget.setVisible(source == "Web-Safe")
+                        elif label_text == "Google Font:":
+                            label_widget.setVisible(source == "Google Font")
+                        elif label_text == "Custom Font File:":
+                            label_widget.setVisible(source == "Custom File")
+
+        # Show the relevant input
+        if source == "System Font":
+            self.font_family_combo.setVisible(True)
+        elif source == "Web-Safe":
+            self.display_websafe_combo.setVisible(True)
+        elif source == "Google Font":
+            self.display_google_font_combo.setVisible(True)
+        elif source == "Custom File":
+            self.display_custom_font_input.setVisible(True)
+            self.display_custom_font_browse.setVisible(True)
+
+    def _browse_display_custom_font(self):
+        """Browse for a custom font file."""
+        file_path, _ = QFileDialog.getOpenFileName(
+            self,
+            "Select Font File",
+            "",
+            "Font Files (*.ttf *.otf *.woff *.woff2);;All Files (*)"
+        )
+        if file_path:
+            self.display_custom_font_input.setText(file_path)
+
     def _load_current_settings(self):
         """Load current settings from config."""
         # User settings
@@ -402,6 +612,7 @@ class SettingsDialog(QDialog):
         self.realtime_enabled_check.setChecked(self.config.get('transcription.enable_realtime_transcription', False))
         realtime_model = self.config.get('transcription.realtime_model', 'tiny.en')
         self.realtime_model_combo.setCurrentText(realtime_model)
+        self.realtime_pause_input.setText(str(self.config.get('transcription.realtime_processing_pause', 0.1)))
 
         # VAD settings
         silero_sens = self.config.get('transcription.silero_sensitivity', 0.4)
@@ -417,13 +628,23 @@ class SettingsDialog(QDialog):
         self.post_silence_input.setText(str(self.config.get('transcription.post_speech_silence_duration', 0.3)))
         self.min_recording_input.setText(str(self.config.get('transcription.min_length_of_recording', 0.5)))
         self.pre_buffer_input.setText(str(self.config.get('transcription.pre_recording_buffer_duration', 0.2)))
+        self.continuous_mode_check.setChecked(self.config.get('transcription.continuous_mode', False))
 
         # Display settings
         self.timestamps_check.setChecked(self.config.get('display.show_timestamps', True))
         self.maxlines_input.setText(str(self.config.get('display.max_lines', 100)))
 
+        # Display font settings
+        display_font_source = self.config.get('display.font_source', 'System Font')
+        self.display_font_source_combo.setCurrentText(display_font_source)
         font_family = self.config.get('display.font_family', 'Courier')
         self.font_family_combo.setCurrentText(font_family)
+        self.display_websafe_combo.setCurrentText(self.config.get('display.websafe_font', 'Arial'))
+        display_google_font = self.config.get('display.google_font', 'Roboto')
+        if display_google_font:
+            self.display_google_font_combo.setCurrentText(display_google_font)
+        self.display_custom_font_input.setText(self.config.get('display.custom_font_file', ''))
+        self._on_display_font_source_changed(display_font_source)
 
         self.font_size_input.setText(str(self.config.get('display.font_size', 12)))
         self.fade_seconds_input.setText(str(self.config.get('display.fade_after_seconds', 10)))
@@ -434,6 +655,12 @@ class SettingsDialog(QDialog):
         self.server_room_input.setText(self.config.get('server_sync.room', 'default'))
         self.server_passphrase_input.setText(self.config.get('server_sync.passphrase', ''))
 
+        # Remote processing settings
+        self.remote_enabled_check.setChecked(self.config.get('remote_processing.enabled', False))
+        self.remote_url_input.setText(self.config.get('remote_processing.server_url', ''))
+        self.remote_api_key_input.setText(self.config.get('remote_processing.api_key', ''))
+        self.remote_fallback_check.setChecked(self.config.get('remote_processing.fallback_to_local', True))
+
     def _save_settings(self):
         """Save settings to config."""
         try:
@@ -459,6 +686,7 @@ class SettingsDialog(QDialog):
             # Realtime preview
             self.config.set('transcription.enable_realtime_transcription', self.realtime_enabled_check.isChecked())
             self.config.set('transcription.realtime_model', self.realtime_model_combo.currentText())
+            self.config.set('transcription.realtime_processing_pause', float(self.realtime_pause_input.text()))
 
             # VAD settings
             self.config.set('transcription.silero_sensitivity', self.silero_slider.value() / 100.0)
@@ -469,12 +697,20 @@ class SettingsDialog(QDialog):
             self.config.set('transcription.post_speech_silence_duration', float(self.post_silence_input.text()))
             self.config.set('transcription.min_length_of_recording', float(self.min_recording_input.text()))
             self.config.set('transcription.pre_recording_buffer_duration', float(self.pre_buffer_input.text()))
+            self.config.set('transcription.continuous_mode', self.continuous_mode_check.isChecked())
 
             # Display settings
             self.config.set('display.show_timestamps', self.timestamps_check.isChecked())
             max_lines = int(self.maxlines_input.text())
             self.config.set('display.max_lines', max_lines)
+
+            # Display font settings (also used for server sync)
+            self.config.set('display.font_source', self.display_font_source_combo.currentText())
             self.config.set('display.font_family', self.font_family_combo.currentText())
+            self.config.set('display.websafe_font', self.display_websafe_combo.currentText())
+            self.config.set('display.google_font', self.display_google_font_combo.currentText())
+            self.config.set('display.custom_font_file', self.display_custom_font_input.text())
+
             font_size = int(self.font_size_input.text())
             self.config.set('display.font_size', font_size)
             fade_seconds = int(self.fade_seconds_input.text())
@@ -486,6 +722,12 @@ class SettingsDialog(QDialog):
             self.config.set('server_sync.room', self.server_room_input.text())
             self.config.set('server_sync.passphrase', self.server_passphrase_input.text())
 
+            # Remote processing settings
+            self.config.set('remote_processing.enabled', self.remote_enabled_check.isChecked())
+            self.config.set('remote_processing.server_url', self.remote_url_input.text())
+            self.config.set('remote_processing.api_key', self.remote_api_key_input.text())
+            self.config.set('remote_processing.fallback_to_local', self.remote_fallback_check.isChecked())
+
             # Call save callback (which will show the success message)
             if self.on_save:
                 self.on_save()

gui/transcription_display_qt.py

@@ -1,7 +1,7 @@
 """PySide6 transcription display widget for showing real-time transcriptions."""
 
 from PySide6.QtWidgets import QTextEdit
-from PySide6.QtGui import QFont, QTextCursor
+from PySide6.QtGui import QFont, QTextCursor, QTextCharFormat, QColor
 from PySide6.QtCore import Qt, Slot
 from datetime import datetime
 
@@ -28,6 +28,10 @@ class TranscriptionDisplay(QTextEdit):
         self.font_family = font_family
         self.font_size = font_size
 
+        # Track the current preview line for two-stage transcription
+        self.preview_line_index = -1  # -1 means no active preview
+        self.preview_block_number = -1  # Block number for the preview line
+
         # Configure text widget
         self.setReadOnly(True)
         self.setFont(QFont(font_family, font_size))
@@ -43,6 +47,36 @@ class TranscriptionDisplay(QTextEdit):
             }
         """)
 
+    def _format_line(self, text: str, user_name: str, timestamp: datetime, is_preview: bool = False) -> str:
+        """
+        Format a transcription line.
+
+        Args:
+            text: Transcription text
+            user_name: User/speaker name
+            timestamp: Timestamp of transcription
+            is_preview: Whether this is a preview line
+
+        Returns:
+            Formatted line string
+        """
+        line_parts = []
+
+        if self.show_timestamps:
+            time_str = timestamp.strftime("%H:%M:%S")
+            line_parts.append(f"[{time_str}]")
+
+        if user_name and user_name.strip():
+            line_parts.append(f"{user_name}:")
+
+        # Add preview indicator for visual distinction
+        if is_preview:
+            line_parts.append(f"[...] {text}")
+        else:
+            line_parts.append(text)
+
+        return " ".join(line_parts)
+
     @Slot(str, str)
     def add_transcription(self, text: str, user_name: str = "", timestamp: datetime = None):
         """
@@ -56,35 +90,130 @@ class TranscriptionDisplay(QTextEdit):
         if timestamp is None:
             timestamp = datetime.now()
 
-        # Build the display line
-        line_parts = []
+        line = self._format_line(text, user_name, timestamp, is_preview=False)
 
-        if self.show_timestamps:
-            time_str = timestamp.strftime("%H:%M:%S")
-            line_parts.append(f"[{time_str}]")
-
-        if user_name:
-            line_parts.append(f"{user_name}:")
-
-        line_parts.append(text)
-
-        line = " ".join(line_parts)
-
-        # Add to display
-        self.append(line)
+        # If there's an active preview, replace it instead of appending
+        if self.preview_line_index >= 0:
+            self._replace_preview_with_final(line)
+        else:
+            # Add to display normally
+            self.append(line)
+            self.line_count += 1
 
         # Auto-scroll to bottom
         cursor = self.textCursor()
         cursor.movePosition(QTextCursor.End)
         self.setTextCursor(cursor)
 
-        # Track line count
-        self.line_count += 1
-
         # Remove old lines if exceeding max
         if self.line_count > self.max_lines:
             self._remove_oldest_lines(self.line_count - self.max_lines)
 
+    @Slot(str, str)
+    def add_preview(self, text: str, user_name: str = "", timestamp: datetime = None):
+        """
+        Add a preview transcription that will be replaced by the final transcription.
+
+        Args:
+            text: Preview transcription text
+            user_name: User/speaker name
+            timestamp: Timestamp of transcription
+        """
+        if timestamp is None:
+            timestamp = datetime.now()
+
+        line = self._format_line(text, user_name, timestamp, is_preview=True)
+
+        # If there's already a preview, replace it
+        if self.preview_line_index >= 0:
+            self._replace_preview_line(line)
+        else:
+            # Add new preview line
+            cursor = self.textCursor()
+            cursor.movePosition(QTextCursor.End)
+
+            # Apply italic formatting for preview
+            fmt = QTextCharFormat()
+            fmt.setFontItalic(True)
+
+            if self.line_count > 0:
+                cursor.insertText("\n")
+
+            cursor.insertText(line, fmt)
+
+            self.preview_line_index = self.line_count
+            self.preview_block_number = self.document().blockCount() - 1
+            self.line_count += 1
+
+        # Auto-scroll to bottom
+        cursor = self.textCursor()
+        cursor.movePosition(QTextCursor.End)
+        self.setTextCursor(cursor)
+
+    def _replace_preview_line(self, new_text: str):
+        """Replace the current preview line with new preview text."""
+        if self.preview_block_number < 0:
+            return
+
+        doc = self.document()
+        block = doc.findBlockByNumber(self.preview_block_number)
+
+        if block.isValid():
+            cursor = QTextCursor(block)
+            cursor.select(QTextCursor.BlockUnderCursor)
+
+            # Apply italic formatting for preview
+            fmt = QTextCharFormat()
+            fmt.setFontItalic(True)
+
+            cursor.removeSelectedText()
+            cursor.insertText(new_text, fmt)
+
+    def _replace_preview_with_final(self, final_text: str):
+        """Replace the preview line with final transcription."""
+        if self.preview_block_number < 0:
+            # No preview to replace, just add normally
+            self.append(final_text)
+            self.line_count += 1
+            self.preview_line_index = -1
+            self.preview_block_number = -1
+            return
+
+        doc = self.document()
+        block = doc.findBlockByNumber(self.preview_block_number)
+
+        if block.isValid():
+            cursor = QTextCursor(block)
+            cursor.select(QTextCursor.BlockUnderCursor)
+
+            # Apply normal formatting for final text
+            fmt = QTextCharFormat()
+            fmt.setFontItalic(False)
+            fmt.setForeground(QColor(255, 255, 255))  # White for final
+
+            cursor.removeSelectedText()
+            cursor.insertText(final_text, fmt)
+
+        # Clear preview tracking
+        self.preview_line_index = -1
+        self.preview_block_number = -1
+
+    def clear_preview(self):
+        """Clear the current preview without adding a final transcription."""
+        if self.preview_block_number >= 0:
+            doc = self.document()
+            block = doc.findBlockByNumber(self.preview_block_number)
+
+            if block.isValid():
+                cursor = QTextCursor(block)
+                cursor.select(QTextCursor.BlockUnderCursor)
+                cursor.removeSelectedText()
+                cursor.deleteChar()  # Remove newline
+                self.line_count -= 1
+
+        self.preview_line_index = -1
+        self.preview_block_number = -1
+
     def _remove_oldest_lines(self, num_lines: int):
         """
         Remove oldest lines from the display.
@@ -102,10 +231,20 @@ class TranscriptionDisplay(QTextEdit):
 
         self.line_count -= num_lines
 
+        # Adjust preview tracking if lines were removed
+        if self.preview_line_index >= 0:
+            self.preview_line_index -= num_lines
+            self.preview_block_number -= num_lines
+            if self.preview_line_index < 0:
+                self.preview_line_index = -1
+                self.preview_block_number = -1
+
     def clear_all(self):
         """Clear all transcriptions."""
         self.clear()
         self.line_count = 0
+        self.preview_line_index = -1
+        self.preview_block_number = -1
 
     def get_all_text(self) -> str:
         """

main.py

@@ -41,43 +41,68 @@ if getattr(sys, 'frozen', False) and sys.platform == 'win32':
         sys.stderr = io.StringIO()
 
 # Add project root to Python path
-project_root = Path(__file__).parent
+# Use resolve() to follow symlinks and get the real path
+project_root = Path(__file__).resolve().parent
 sys.path.insert(0, str(project_root))
 
-from PySide6.QtWidgets import QApplication, QSplashScreen
-from PySide6.QtGui import QPixmap, QPainter, QColor, QFont
-from PySide6.QtCore import Qt, QTimer
-from gui.main_window_qt import MainWindow
+# Change working directory to project root so relative paths work
+os.chdir(project_root)
+
+# Import only minimal Qt components needed for splash and dialogs
+# Heavy imports (MainWindow) are deferred until after splash is shown
+from PySide6.QtWidgets import QApplication, QSplashScreen, QMessageBox
+from PySide6.QtGui import QPixmap, QPainter, QColor, QFont, QIcon
+from PySide6.QtCore import Qt
+
+# Import single instance lock (lightweight module)
+from client.instance_lock import InstanceLock
+
+
+def get_icon_path():
+    """Get the application icon path."""
+    if getattr(sys, 'frozen', False):
+        # Running in PyInstaller bundle
+        return Path(sys._MEIPASS) / "LocalTranscription.png"
+    else:
+        # Running in normal Python
+        return project_root / "LocalTranscription.png"
 
 
 def create_splash_pixmap(message="Loading..."):
-    """Create a pixmap for the splash screen with a custom message."""
-    pixmap = QPixmap(500, 300)
+    """Create a pixmap for the splash screen with the app icon."""
+    pixmap = QPixmap(400, 320)
     pixmap.fill(QColor("#2b2b2b"))
 
     # Draw on the pixmap
     painter = QPainter(pixmap)
     painter.setRenderHint(QPainter.Antialiasing)
+    painter.setRenderHint(QPainter.SmoothPixmapTransform)
 
-    # Draw title
-    title_font = QFont("Arial", 28, QFont.Bold)
-    painter.setFont(title_font)
-    painter.setPen(QColor("#ffffff"))
-    painter.drawText(pixmap.rect(), Qt.AlignCenter, "Local Transcription")
+    # Load and draw the icon
+    icon_path = get_icon_path()
+    if icon_path.exists():
+        icon_pixmap = QPixmap(str(icon_path))
+        # Scale icon to fit nicely (200x200)
+        scaled_icon = icon_pixmap.scaled(200, 200, Qt.KeepAspectRatio, Qt.SmoothTransformation)
+        # Center the icon horizontally, position it in upper portion
+        icon_x = (pixmap.width() - scaled_icon.width()) // 2
+        icon_y = 30
+        painter.drawPixmap(icon_x, icon_y, scaled_icon)
 
-    # Draw subtitle
+    # Draw loading message below icon
     subtitle_font = QFont("Arial", 12)
     painter.setFont(subtitle_font)
     painter.setPen(QColor("#888888"))
-    subtitle_rect = pixmap.rect().adjusted(0, 60, 0, 0)
-    painter.drawText(subtitle_rect, Qt.AlignCenter, message)
+    subtitle_rect = pixmap.rect().adjusted(0, 0, 0, -40)
+    painter.drawText(subtitle_rect, Qt.AlignHCenter | Qt.AlignBottom, message)
 
     # Draw version/status at bottom
+    from version import __version__
     status_font = QFont("Arial", 10)
     painter.setFont(status_font)
     painter.setPen(QColor("#666666"))
-    status_rect = pixmap.rect().adjusted(0, 0, 0, -20)
-    painter.drawText(status_rect, Qt.AlignHCenter | Qt.AlignBottom, "Please wait...")
+    status_rect = pixmap.rect().adjusted(0, 0, 0, -15)
+    painter.drawText(status_rect, Qt.AlignHCenter | Qt.AlignBottom, f"v{__version__}")
 
     painter.end()
     return pixmap
@@ -93,11 +118,14 @@ def create_splash_screen():
 
 def main():
     """Main application entry point."""
+    # Instance lock for cleanup on exit
+    instance_lock = None
+
     try:
         print("Starting Local Transcription Application...")
         print("=" * 50)
 
-        # Create Qt application
+        # Create Qt application first (needed for dialogs)
         app = QApplication(sys.argv)
 
         # Set application info
@@ -105,19 +133,24 @@ def main():
         app.setOrganizationName("LocalTranscription")
 
         # Set application icon
-        # In PyInstaller frozen executables, use _MEIPASS for bundled files
-        if getattr(sys, 'frozen', False):
-            # Running in PyInstaller bundle
-            icon_path = Path(sys._MEIPASS) / "LocalTranscription.png"
-        else:
-            # Running in normal Python
-            icon_path = project_root / "LocalTranscription.png"
-
+        icon_path = get_icon_path()
         if icon_path.exists():
-            from PySide6.QtGui import QIcon
             app.setWindowIcon(QIcon(str(icon_path)))
 
-        # Create and show splash screen
+        # Check for single instance BEFORE showing splash
+        instance_lock = InstanceLock()
+        if not instance_lock.acquire():
+            # Another instance is already running
+            QMessageBox.warning(
+                None,
+                "Application Already Running",
+                "Local Transcription is already running.\n\n"
+                "Please check your taskbar or system tray for the existing instance.",
+                QMessageBox.Ok
+            )
+            sys.exit(0)
+
+        # Create and show splash screen IMMEDIATELY
         splash = create_splash_screen()
         splash.show()
         app.processEvents()  # Make sure splash is visible
@@ -126,6 +159,13 @@ def main():
         splash.showMessage("Loading configuration...", Qt.AlignBottom | Qt.AlignCenter, QColor("#888888"))
         app.processEvents()
 
+        # NOW import heavy modules (after splash is visible)
+        # This is the slow part - importing MainWindow loads many dependencies
+        splash.showMessage("Loading application modules...", Qt.AlignBottom | Qt.AlignCenter, QColor("#888888"))
+        app.processEvents()
+
+        from gui.main_window_qt import MainWindow
+
         # Create main window (this takes time due to model loading)
         # Pass splash to window so it can update the message
         window = MainWindow(splash_screen=splash)
@@ -135,15 +175,25 @@ def main():
         window.show()
 
         # Run application
-        sys.exit(app.exec())
+        exit_code = app.exec()
+
+        # Release lock on normal exit
+        if instance_lock:
+            instance_lock.release()
+
+        sys.exit(exit_code)
 
     except KeyboardInterrupt:
         print("\nApplication interrupted by user")
+        if instance_lock:
+            instance_lock.release()
         sys.exit(0)
     except Exception as e:
         print(f"Fatal error: {e}")
         import traceback
         traceback.print_exc()
+        if instance_lock:
+            instance_lock.release()
         sys.exit(1)
 
 

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "local-transcription"
-version = "0.1.0"
+version = "1.0.0"
 description = "A standalone desktop application for real-time speech-to-text transcription using Whisper models"
 readme = "README.md"
 requires-python = ">=3.9"

server/COMPARISON.md

@@ -1,308 +0,0 @@
-# Multi-User Server Comparison
-
-## TL;DR: Which Should You Use?
-
-| Situation | Recommended Solution |
-|-----------|---------------------|
-| **Shared hosting (cPanel, etc.)** | **PHP Polling** (display-polling.php) |
-| **VPS or cloud server** | **Node.js** (best performance) |
-| **Quick test/demo** | **PHP Polling** (easiest) |
-| **Production with many users** | **Node.js** (most reliable) |
-| **No server access** | Use local-only mode |
-
-## Detailed Comparison
-
-### 1. PHP with SSE (Original - server.php + display.php)
-
-**Status:** ⚠️ **PROBLEMATIC** - Not recommended
-
-**Problems:**
-- PHP-FPM buffers output (SSE doesn't work)
-- Apache/Nginx proxy timeouts
-- Shared hosting often blocks long connections
-- High resource usage (one PHP process per viewer)
-
-**When it might work:**
-- Only with specific Apache configurations
-- Not on shared hosting with PHP-FPM
-- Requires `ProxyTimeout` settings
-
-**Verdict:** ❌ Avoid unless you have full server control and can configure Apache properly
-
----
-
-### 2. PHP with Polling (NEW - display-polling.php)
-
-**Status:** ✅ **RECOMMENDED for PHP**
-
-**Pros:**
-- ✅ Works on ANY shared hosting
-- ✅ No buffering issues
-- ✅ No special configuration needed
-- ✅ Simple to deploy (just upload files)
-- ✅ Uses standard HTTP requests
-
-**Cons:**
-- ❌ Higher latency (1-2 seconds)
-- ❌ More server requests (polls every second)
-- ❌ Slightly higher bandwidth
-
-**Performance:**
-- Latency: 1-2 seconds
-- Max users: 20-30 concurrent viewers
-- Resource usage: Moderate
-
-**Best for:**
-- Shared hosting (cPanel, Bluehost, etc.)
-- Quick deployment
-- Small to medium groups
-
-**Setup:**
-```bash
-# Just upload these files:
-server.php
-display-polling.php  # ← Use this instead of display.php
-config.php
-```
-
-**OBS URL:**
-```
-https://your-site.com/transcription/display-polling.php?room=ROOM&fade=10
-```
-
----
-
-### 3. Node.js Server (NEW - server/nodejs/)
-
-**Status:** ⭐ **BEST PERFORMANCE**
-
-**Pros:**
-- ✅ Native WebSocket support
-- ✅ Real-time updates (< 100ms latency)
-- ✅ Handles 100+ concurrent connections easily
-- ✅ Lower resource usage
-- ✅ No buffering issues
-- ✅ Event-driven architecture
-
-**Cons:**
-- ❌ Requires VPS or cloud server
-- ❌ Need to install Node.js
-- ❌ More setup than PHP
-
-**Performance:**
-- Latency: < 100ms
-- Max users: 500+ concurrent
-- Resource usage: Very low (~50MB RAM)
-
-**Best for:**
-- Production deployments
-- Large groups (10+ streamers)
-- Professional use
-- Anyone with a VPS
-
-**Setup:**
-```bash
-cd server/nodejs
-npm install
-npm start
-```
-
-**Free hosting options:**
-- Railway.app (free tier)
-- Heroku (free tier)
-- Fly.io (free tier)
-- Any $5/month VPS (DigitalOcean, Linode)
-
-**OBS URL:**
-```
-http://your-server.com:3000/display?room=ROOM&fade=10
-```
-
----
-
-## Feature Comparison Matrix
-
-| Feature | PHP SSE | PHP Polling | Node.js |
-|---------|---------|-------------|---------|
-| **Real-time** | ⚠️ Should be, but breaks | ⚠️ 1-2s delay | ✅ < 100ms |
-| **Reliability** | ❌ Buffering issues | ✅ Very reliable | ✅ Very reliable |
-| **Shared Hosting** | ❌ Usually fails | ✅ Works everywhere | ❌ Needs VPS |
-| **Setup Difficulty** | 🟡 Medium | 🟢 Easy | 🟡 Medium |
-| **Max Users** | 10 | 30 | 500+ |
-| **Resource Usage** | High | Medium | Low |
-| **Latency** | Should be instant, but... | 1-2 seconds | < 100ms |
-| **Cost** | $5-10/month hosting | $5-10/month hosting | Free - $5/month |
-
----
-
-## Migration Guide
-
-### From PHP SSE to PHP Polling
-
-**Super easy - just change the URL:**
-
-Old:
-```
-https://your-site.com/transcription/display.php?room=ROOM
-```
-
-New:
-```
-https://your-site.com/transcription/display-polling.php?room=ROOM
-```
-
-Everything else stays the same! The desktop app doesn't need changes.
-
----
-
-### From PHP to Node.js
-
-**1. Deploy Node.js server** (see server/nodejs/README.md)
-
-**2. Update desktop app settings:**
-
-Old (PHP):
-```
-Server URL: https://your-site.com/transcription/server.php
-```
-
-New (Node.js):
-```
-Server URL: http://your-server.com:3000/api/send
-```
-
-**3. Update OBS browser source:**
-
-Old (PHP):
-```
-https://your-site.com/transcription/display.php?room=ROOM
-```
-
-New (Node.js):
-```
-http://your-server.com:3000/display?room=ROOM&fade=10
-```
-
----
-
-## Testing Your Setup
-
-### Test PHP Polling
-
-1. Upload files to server
-2. Visit: `https://your-site.com/transcription/server.php`
-   - Should see JSON response
-3. Visit: `https://your-site.com/transcription/display-polling.php?room=test`
-   - Should see "🟡 Waiting for data..."
-4. Send a test message:
-   ```bash
-   curl -X POST "https://your-site.com/transcription/server.php?action=send" \
-     -H "Content-Type: application/json" \
-     -d '{
-       "room": "test",
-       "passphrase": "testpass",
-       "user_name": "TestUser",
-       "text": "Hello World",
-       "timestamp": "12:34:56"
-     }'
-   ```
-5. Display should show "Hello World" within 1-2 seconds
-
-### Test Node.js
-
-1. Start server: `npm start`
-2. Visit: `http://localhost:3000`
-   - Should see JSON response
-3. Visit: `http://localhost:3000/display?room=test`
-   - Should see "⚫ Connecting..." then "🟢 Connected"
-4. Send test message (same curl as above, but to `http://localhost:3000/api/send`)
-5. Display should show message instantly
-
----
-
-## Troubleshooting
-
-### PHP Polling Issues
-
-**"Status stays yellow"**
-- Room doesn't exist yet
-- Send a message from desktop app first
-
-**"Gets 500 error"**
-- Check PHP error logs
-- Verify `data/` directory is writable
-
-**"Slow updates (5+ seconds)"**
-- Increase poll interval: `?poll=500` (500ms)
-- Check server load
-
-### Node.js Issues
-
-**"Cannot connect"**
-- Check firewall allows port 3000
-- Verify server is running: `curl http://localhost:3000`
-
-**"WebSocket failed"**
-- Check browser console for errors
-- Try different port
-- Check reverse proxy settings if using Nginx
-
----
-
-## Recommendations by Use Case
-
-### Solo Streamer (Local Only)
-**Use:** Built-in web server (no multi-user server needed)
-- Just run the desktop app
-- OBS: `http://localhost:8080`
-
-### 2-3 Friends on Shared Hosting
-**Use:** PHP Polling
-- Upload to your existing web hosting
-- Cost: $0 (use existing hosting)
-- Setup time: 5 minutes
-
-### 5+ Streamers, Want Best Quality
-**Use:** Node.js on VPS
-- Deploy to Railway.app (free) or DigitalOcean ($5/month)
-- Real-time updates
-- Professional quality
-
-### Large Event/Convention
-**Use:** Node.js on cloud
-- Deploy to AWS/Azure/GCP
-- Use load balancer for redundancy
-- Can handle hundreds of users
-
----
-
-## Cost Breakdown
-
-### PHP Polling
-- **Shared hosting:** $5-10/month (or free if you already have hosting)
-- **Total:** $5-10/month
-
-### Node.js
-- **Free options:**
-  - Railway.app (500 hours/month free)
-  - Heroku (free dyno)
-  - Fly.io (free tier)
-- **Paid options:**
-  - DigitalOcean Droplet: $5/month
-  - Linode: $5/month
-  - AWS EC2 t2.micro: $8/month (or free tier)
-- **Total:** $0-8/month
-
-### Just Use Local Mode
-- **Cost:** $0
-- **Limitation:** Only shows your own transcriptions (no multi-user sync)
-
----
-
-## Final Recommendation
-
-**For most users:** Start with **PHP Polling** on shared hosting. It works reliably and is dead simple.
-
-**If you want the best:** Use **Node.js** - it's worth the extra setup for the performance.
-
-**For testing:** Use **local mode** (no server) - built into the desktop app.

server/QUICK_FIX.md

@@ -1,218 +0,0 @@
-# Quick Fix for Multi-User Display Issues
-
-## The Problem
-
-Your PHP SSE (Server-Sent Events) setup isn't working because:
-1. **PHP-FPM buffers output** - Shared hosting uses PHP-FPM which buffers everything
-2. **Apache/Nginx timeouts** - Proxy kills long connections
-3. **SSE isn't designed for PHP** - PHP processes are meant to be short-lived
-
-## The Solutions (in order of recommendation)
-
----
-
-### ✅ Solution 1: Use PHP Polling (Easiest Fix)
-
-**What changed:** Instead of SSE (streaming), use regular HTTP polling every 1 second
-
-**Files affected:**
-- **Keep:** `server.php`, `config.php` (no changes needed)
-- **Replace:** Use `display-polling.php` instead of `display.php`
-
-**Setup:**
-1. Upload `display-polling.php` to your server
-2. Change your OBS Browser Source URL from:
-   ```
-   OLD: https://your-site.com/transcription/display.php?room=ROOM
-   NEW: https://your-site.com/transcription/display-polling.php?room=ROOM
-   ```
-3. Done! No other changes needed.
-
-**Pros:**
-- ✅ Works on ANY shared hosting
-- ✅ No server configuration needed
-- ✅ Uses your existing setup
-- ✅ 5-minute fix
-
-**Cons:**
-- ⚠️ 1-2 second latency (vs instant with WebSocket)
-- ⚠️ More server requests (but minimal impact)
-
-**Performance:** Good for 2-20 concurrent users
-
----
-
-### ⭐ Solution 2: Use Node.js Server (Best Performance)
-
-**What changed:** Switch from PHP to Node.js - designed for real-time
-
-**Setup:**
-1. Get a VPS (or use free hosting like Railway.app)
-2. Install Node.js:
-   ```bash
-   cd server/nodejs
-   npm install
-   npm start
-   ```
-3. Update desktop app Server URL to:
-   ```
-   http://your-server.com:3000/api/send
-   ```
-4. Update OBS URL to:
-   ```
-   http://your-server.com:3000/display?room=ROOM
-   ```
-
-**Pros:**
-- ✅ Real-time (< 100ms latency)
-- ✅ Handles 100+ users easily
-- ✅ Native WebSocket support
-- ✅ Lower resource usage
-- ✅ Can use free hosting (Railway, Heroku, Fly.io)
-
-**Cons:**
-- ❌ Requires VPS or cloud hosting (can't use shared hosting)
-- ❌ More setup than PHP
-
-**Performance:** Excellent for any number of users
-
-**Free Hosting Options:**
-- Railway.app (easiest - just connect GitHub)
-- Heroku (free tier)
-- Fly.io (free tier)
-
----
-
-### 🔧 Solution 3: Fix PHP SSE (Advanced - Not Recommended)
-
-**Only if you have full server control and really want SSE**
-
-This requires:
-1. Apache configuration changes
-2. Disabling output buffering
-3. Increasing timeouts
-
-See `apache-sse-config.conf` for details.
-
-**Not recommended because:** It's complex, fragile, and PHP polling is easier and more reliable.
-
----
-
-## Quick Comparison
-
-| Solution | Setup Time | Reliability | Latency | Works on Shared Hosting? |
-|----------|-----------|-------------|---------|-------------------------|
-| **PHP Polling** | 5 min | ⭐⭐⭐⭐⭐ | 1-2s | ✅ Yes |
-| **Node.js** | 30 min | ⭐⭐⭐⭐⭐ | < 100ms | ❌ No (needs VPS) |
-| **PHP SSE** | 2 hours | ⭐⭐ | Should be instant | ❌ Rarely |
-
----
-
-## Testing Your Fix
-
-### Test PHP Polling
-
-1. Run the test script:
-   ```bash
-   cd server
-   ./test-server.sh
-   ```
-
-2. Or manually:
-   ```bash
-   # Send a test message
-   curl -X POST "https://your-site.com/transcription/server.php?action=send" \
-     -H "Content-Type: application/json" \
-     -d '{
-       "room": "test",
-       "passphrase": "testpass",
-       "user_name": "TestUser",
-       "text": "Hello World",
-       "timestamp": "12:34:56"
-     }'
-
-   # Open in browser:
-   https://your-site.com/transcription/display-polling.php?room=test
-
-   # Should see "Hello World" appear within 1-2 seconds
-   ```
-
-### Test Node.js
-
-1. Start server:
-   ```bash
-   cd server/nodejs
-   npm install
-   npm start
-   ```
-
-2. Open browser:
-   ```
-   http://localhost:3000/display?room=test
-   ```
-
-3. Send test message:
-   ```bash
-   curl -X POST "http://localhost:3000/api/send" \
-     -H "Content-Type: application/json" \
-     -d '{
-       "room": "test",
-       "passphrase": "testpass",
-       "user_name": "TestUser",
-       "text": "Hello World",
-       "timestamp": "12:34:56"
-     }'
-   ```
-
-4. Should see message appear **instantly**
-
----
-
-## My Recommendation
-
-**Start with PHP Polling** (Solution 1):
-- Upload `display-polling.php`
-- Change OBS URL
-- Test it out
-
-**If you like it and want better performance**, migrate to Node.js (Solution 2):
-- Takes 30 minutes
-- Much better performance
-- Can use free hosting
-
-**Forget about PHP SSE** (Solution 3):
-- Too much work
-- Unreliable
-- Not worth it
-
----
-
-## Files You Need
-
-### For PHP Polling
-- ✅ `server.php` (already have)
-- ✅ `config.php` (already have)
-- ✅ `display-polling.php` (NEW - just created)
-- ❌ `display.php` (don't use anymore)
-
-### For Node.js
-- ✅ `server/nodejs/server.js` (NEW)
-- ✅ `server/nodejs/package.json` (NEW)
-- ✅ `server/nodejs/README.md` (NEW)
-
----
-
-## Need Help?
-
-1. Read [COMPARISON.md](COMPARISON.md) for detailed comparison
-2. Read [server/nodejs/README.md](nodejs/README.md) for Node.js setup
-3. Run `./test-server.sh` to diagnose issues
-4. Check browser console for errors
-
----
-
-## Bottom Line
-
-**Your SSE display doesn't work because PHP + shared hosting + SSE = bad combo.**
-
-**Use PHP Polling (1-2s delay) or Node.js (instant).** Both work reliably.

server/SYNC_PERFORMANCE.md

@@ -1,248 +0,0 @@
-# Server Sync Performance - Before vs After
-
-## The Problem You Experienced
-
-**Symptom:** Shared sync display was several seconds behind local transcription
-
-**Why:** The test script worked fast because it sent ONE message. But the Python app sends messages continuously during speech, and they were getting queued up!
-
----
-
-## Before Fix: Serial Processing ❌
-
-```
-You speak:    "Hello"  "How"  "are"  "you"  "today"
-               ↓        ↓      ↓      ↓      ↓
-Local GUI:    Hello    How    are    you    today  ← Instant!
-               ↓        ↓      ↓      ↓      ↓
-Send Queue:   [Hello]→[How]→[are]→[you]→[today]
-               |
-               ↓ (Wait for HTTP response before sending next)
-HTTP:         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-              Send     Send   Send   Send   Send
-              Hello    How    are    you    today
-              (200ms)  (200ms)(200ms)(200ms)(200ms)
-              ↓        ↓      ↓      ↓      ↓
-Server:       Hello    How    are    you    today
-               ↓        ↓      ↓      ↓      ↓
-Display:      Hello    How    are    you    today  ← 1 second behind!
-              (0ms)    (200ms)(400ms)(600ms)(800ms)
-```
-
-**Total delay:** 1 second for 5 messages!
-
----
-
-## After Fix: Parallel Processing ✅
-
-```
-You speak:    "Hello"  "How"  "are"  "you"  "today"
-               ↓        ↓      ↓      ↓      ↓
-Local GUI:    Hello    How    are    you    today  ← Instant!
-               ↓        ↓      ↓      ↓      ↓
-Send Queue:   [Hello]  [How]  [are]  [you]  [today]
-               ↓        ↓      ↓
-               ↓        ↓      ↓  ← Up to 3 parallel workers!
-HTTP:         ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-              Send Hello  ┐
-              Send How    ├─ All sent simultaneously!
-              Send are    ┘
-              Wait for free worker...
-              Send you    ┐
-              Send today  ┘
-              (200ms total!)
-              ↓        ↓      ↓      ↓      ↓
-Server:       Hello    How    are    you    today
-               ↓        ↓      ↓      ↓      ↓
-Display:      Hello    How    are    you    today  ← 200ms behind!
-              (0ms)    (0ms)  (0ms)  (0ms)  (200ms)
-```
-
-**Total delay:** 200ms for 5 messages!
-
----
-
-## Real-World Example
-
-### Scenario: You speak a paragraph
-
-**"Hello everyone. How are you doing today? I'm testing the transcription system."**
-
-### Before Fix (Serial)
-```
-Time    Local GUI                  Server Display
-0.0s    "Hello everyone."
-0.2s    "How are you doing today?"
-0.4s    "I'm testing..."           "Hello everyone." ← 0.4s behind!
-0.6s                               "How are you doing..." ← 0.4s behind!
-0.8s                               "I'm testing..." ← 0.4s behind!
-```
-
-### After Fix (Parallel)
-```
-Time    Local GUI                  Server Display
-0.0s    "Hello everyone."
-0.2s    "How are you doing today?" "Hello everyone." ← 0.2s behind!
-0.4s    "I'm testing..."           "How are you doing..." ← 0.2s behind!
-0.6s                               "I'm testing..." ← 0.2s behind!
-```
-
-**Improvement:** Consistent 200ms delay vs growing 400-800ms delay!
-
----
-
-## Technical Details
-
-### Problem 1: Wrong URL Format ❌
-```python
-# What the client was sending to Node.js:
-POST http://localhost:3000/api/send?action=send
-
-# What Node.js was expecting:
-POST http://localhost:3000/api/send
-```
-
-**Fix:** Auto-detect server type
-```python
-if 'server.php' in url:
-    # PHP server needs ?action=send
-    POST http://server.com/server.php?action=send
-else:
-    # Node.js doesn't need it
-    POST http://server.com/api/send
-```
-
-### Problem 2: Blocking HTTP Requests ❌
-```python
-# Old code (BLOCKING):
-while True:
-    message = queue.get()
-    send_http(message)  # ← Wait here! Can't send next until this returns
-```
-
-**Fix:** Use thread pool
-```python
-# New code (NON-BLOCKING):
-executor = ThreadPoolExecutor(max_workers=3)
-while True:
-    message = queue.get()
-    executor.submit(send_http, message)  # ← Returns immediately! Send next!
-```
-
-### Problem 3: Long Timeouts ❌
-```python
-# Old:
-queue.get(timeout=1.0)  # Wait up to 1 second for new message
-send_http(..., timeout=5.0)  # Wait up to 5 seconds for response
-
-# New:
-queue.get(timeout=0.1)  # Check queue every 100ms (responsive!)
-send_http(..., timeout=2.0)  # Fail fast if server slow
-```
-
----
-
-## Performance Metrics
-
-| Metric | Before | After | Improvement |
-|--------|--------|-------|-------------|
-| Single message | 150ms | 150ms | Same |
-| 5 messages (serial) | 750ms | 200ms | **3.7x faster** |
-| 10 messages (serial) | 1500ms | 300ms | **5x faster** |
-| 20 messages (rapid) | 3000ms | 600ms | **5x faster** |
-| Queue polling | 1000ms | 100ms | **10x faster** |
-| Failure timeout | 5000ms | 2000ms | **2.5x faster** |
-
----
-
-## Visual Comparison
-
-### Before: Messages in Queue Building Up
-```
-[Message 1] ━━━━━━━━━━━━━━━━━━━━━ Sending... (200ms)
-[Message 2] Waiting...
-[Message 3] Waiting...
-[Message 4] Waiting...
-[Message 5] Waiting...
-            ↓
-[Message 1] Done ✓
-[Message 2] ━━━━━━━━━━━━━━━━━━━━━ Sending... (200ms)
-[Message 3] Waiting...
-[Message 4] Waiting...
-[Message 5] Waiting...
-            ↓
-... and so on (total: 1 second for 5 messages)
-```
-
-### After: Messages Sent in Parallel
-```
-[Message 1] ━━━━━━━━━━━━━━━━━━━━━ Sending... ┐
-[Message 2] ━━━━━━━━━━━━━━━━━━━━━ Sending... ├─ Parallel! (200ms)
-[Message 3] ━━━━━━━━━━━━━━━━━━━━━ Sending... ┘
-[Message 4] Waiting for free worker...
-[Message 5] Waiting for free worker...
-            ↓ (workers become available)
-[Message 1] Done ✓
-[Message 2] Done ✓
-[Message 3] Done ✓
-[Message 4] ━━━━━━━━━━━━━━━━━━━━━ Sending... ┐
-[Message 5] ━━━━━━━━━━━━━━━━━━━━━ Sending... ┘
-
-Total time: 400ms for 5 messages (2.5x faster!)
-```
-
----
-
-## How to Test the Improvement
-
-1. **Start Node.js server:**
-   ```bash
-   cd server/nodejs
-   npm start
-   ```
-
-2. **Configure desktop app:**
-   - Settings → Server Sync → Enable
-   - Server URL: `http://localhost:3000/api/send`
-   - Room: `test`
-   - Passphrase: `test`
-
-3. **Open display page:**
-   ```
-   http://localhost:3000/display?room=test&fade=20
-   ```
-
-4. **Test rapid speech:**
-   - Start transcription
-   - Speak 5-10 sentences quickly in succession
-   - Watch both local GUI and web display
-
-**Expected:** Web display should be only ~200ms behind local GUI (instead of 1-2 seconds)
-
----
-
-## Why 3 Workers?
-
-**Why not 1?** → Serial processing, slow
-**Why not 10?** → Too many connections, overwhelms server
-**Why 3?** → Good balance:
-- Fast enough for rapid speech
-- Doesn't overwhelm server
-- Low resource usage
-
-You can change this in the code:
-```python
-self.executor = ThreadPoolExecutor(max_workers=3)  # Change to 5 for faster
-```
-
----
-
-## Summary
-
-✅ **Fixed URL format** for Node.js server
-✅ **Added parallel HTTP requests** (up to 3 simultaneous)
-✅ **Reduced timeouts** for faster polling and failure detection
-✅ **Result:** 5-10x faster sync for rapid speech
-
-**Before:** Laggy, messages queue up, 1-2 second delay
-**After:** Near real-time, 100-300ms delay, smooth!

server/nodejs/README.md

@@ -1,15 +1,15 @@
 # Node.js Multi-User Transcription Server
 
-**Much better than PHP for real-time applications!**
+A real-time multi-user transcription sync server for streamers and teams.
 
-## Why Node.js is Better Than PHP for This
+## Features
 
-1. **Native WebSocket Support** - No SSE buffering issues
-2. **Event-Driven** - Designed for real-time connections
-3. **No Buffering Problems** - PHP-FPM/FastCGI buffering is a nightmare
-4. **Lower Latency** - Instant message delivery
-5. **Better Resource Usage** - One process handles all connections
-6. **Easy to Deploy** - Works on any VPS, cloud platform, or even Heroku free tier
+- **Real-time WebSocket** - Instant message delivery (< 100ms latency)
+- **Per-speaker fonts** - Each user can have their own font style
+- **Google Fonts support** - 1000+ free fonts loaded from CDN
+- **Web-safe fonts** - Universal fonts that work everywhere
+- **Custom font uploads** - Upload your own .ttf/.woff2 files
+- **Easy deployment** - Works on any VPS, cloud platform, or locally
 
 ## Quick Start
 
@@ -54,13 +54,35 @@ PORT=8080 npm start
 
 Add a Browser source with this URL:
 ```
-http://your-server.com:3000/display?room=YOUR_ROOM&fade=10&timestamps=true
+http://your-server.com:3000/display?room=YOUR_ROOM&fade=10&timestamps=true&fontsource=websafe&websafefont=Arial
 ```
 
 **Parameters:**
-- `room` - Your room name (required)
-- `fade` - Seconds before text fades (0 = never fade)
-- `timestamps` - Show timestamps (true/false)
+| Parameter | Default | Description |
+|-----------|---------|-------------|
+| `room` | default | Your room name (required) |
+| `fade` | 10 | Seconds before text fades (0 = never fade) |
+| `timestamps` | true | Show timestamps (true/false) |
+| `maxlines` | 50 | Max lines visible (prevents scroll bars) |
+| `fontsize` | 16 | Font size in pixels |
+| `fontsource` | websafe | Font source: `websafe`, `google`, or `custom` |
+| `websafefont` | Arial | Web-safe font name |
+| `googlefont` | Roboto | Google Font name |
+
+**Font Examples:**
+```
+# Web-safe font (works everywhere)
+?room=myroom&fontsource=websafe&websafefont=Courier+New
+
+# Google Font (loaded from CDN)
+?room=myroom&fontsource=google&googlefont=Open+Sans
+
+# Custom font (uploaded by users)
+?room=myroom&fontsource=custom
+```
+
+**Per-Speaker Fonts:**
+Each user can set their own font in the desktop app (Settings → Multi-User Server Sync → Font Source). Per-speaker fonts override the URL defaults, so different speakers can have different fonts on the same display.
 
 ## API Endpoints
 
@@ -74,7 +96,9 @@ Content-Type: application/json
   "passphrase": "my-secret",
   "user_name": "Alice",
   "text": "Hello everyone!",
-  "timestamp": "12:34:56"
+  "timestamp": "12:34:56",
+  "font_family": "Open Sans",    // Optional: per-speaker font
+  "font_type": "google"          // Optional: websafe, google, or custom
 }
 ```
 
@@ -282,17 +306,6 @@ Ports below 1024 require root. Either:
 - Average latency: < 100ms
 - Memory usage: ~50MB
 
-## Comparison: Node.js vs PHP
-
-| Feature | Node.js | PHP (SSE) |
-|---------|---------|-----------|
-| Real-time | ✅ WebSocket | ⚠️ SSE (buffering issues) |
-| Latency | < 100ms | 1-5 seconds (buffering) |
-| Connections | 1000+ | Limited by PHP-FPM |
-| Setup | Easy | Complex (Apache/Nginx config) |
-| Hosting | VPS, Cloud | Shared hosting (problematic) |
-| Resource Usage | Low | High (one PHP process per connection) |
-
 ## License
 
 Part of the Local Transcription project.

server/nodejs/server.js

@@ -27,11 +27,15 @@ const wss = new WebSocket.Server({ server });
 // Configuration
 const PORT = process.env.PORT || 3000;
 const DATA_DIR = path.join(__dirname, 'data');
+const FONTS_DIR = path.join(__dirname, 'fonts');
 const MAX_TRANSCRIPTIONS = 100;
 const CLEANUP_INTERVAL = 2 * 60 * 60 * 1000; // 2 hours
 
+// In-memory font storage by room (font_name -> {data: Buffer, mime: string})
+const roomFonts = new Map();
+
 // Middleware
-app.use(bodyParser.json());
+app.use(bodyParser.json({ limit: '10mb' })); // Increase limit for font uploads
 app.use((req, res, next) => {
     res.header('Access-Control-Allow-Origin', '*');
     res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
@@ -146,7 +150,8 @@ function broadcastToRoom(room, data) {
     });
 
     const broadcastTime = Date.now() - broadcastStart;
-    console.log(`[Broadcast] Sent to ${sent} client(s) in room "${room}" (${broadcastTime}ms)`);
+    const fontInfo = data.font_family ? ` [font: ${data.font_family} (${data.font_type})]` : '';
+    console.log(`[Broadcast] Sent to ${sent} client(s) in room "${room}" (${broadcastTime}ms)${fontInfo}`);
 }
 
 // Cleanup old rooms
@@ -418,10 +423,15 @@ app.get('/', (req, res) => {
                             <li><code>timestamps=true</code> - Show/hide timestamps (true/false)</li>
                             <li><code>maxlines=50</code> - Max lines visible at once (prevents scroll bars)</li>
                             <li><code>fontsize=16</code> - Font size in pixels</li>
-                            <li><code>fontfamily=Arial</code> - Font family (Arial, Courier, etc.)</li>
+                            <li><code>fontsource=websafe</code> - Font source: <code>websafe</code>, <code>google</code>, or <code>custom</code></li>
+                            <li><code>websafefont=Arial</code> - Web-safe font (Arial, Times New Roman, Courier New, etc.)</li>
+                            <li><code>googlefont=Roboto</code> - Google Font name (Roboto, Open Sans, Lato, etc.)</li>
                         </ul>
                         <p style="font-size: 0.85em; color: #888; margin-top: 10px;">
-                            Example: <code>?room=myroom&fade=15&timestamps=false&maxlines=30&fontsize=18</code>
+                            Example: <code>?room=myroom&fade=15&fontsource=google&googlefont=Open+Sans&fontsize=18</code>
+                        </p>
+                        <p style="font-size: 0.85em; color: #888;">
+                            Note: Per-speaker fonts override the default. Each user can set their own font in the app settings.
                         </p>
                     </details>
                 </div>
@@ -541,7 +551,7 @@ app.get('/', (req, res) => {
 
             // Build URLs
             const serverUrl = \`http://\${window.location.host}/api/send\`;
-            const displayUrl = \`http://\${window.location.host}/display?room=\${encodeURIComponent(room)}&fade=10&timestamps=true&maxlines=50&fontsize=16&fontfamily=Arial\`;
+            const displayUrl = \`http://\${window.location.host}/display?room=\${encodeURIComponent(room)}&fade=10&timestamps=true&maxlines=50&fontsize=16&fontsource=websafe&websafefont=Arial\`;
 
             // Update UI
             document.getElementById('serverUrl').textContent = serverUrl;
@@ -592,7 +602,7 @@ app.get('/', (req, res) => {
 app.post('/api/send', async (req, res) => {
     const requestStart = Date.now();
     try {
-        const { room, passphrase, user_name, text, timestamp } = req.body;
+        const { room, passphrase, user_name, text, timestamp, is_preview, font_family, font_type } = req.body;
 
         if (!room || !passphrase || !user_name || !text) {
             return res.status(400).json({ error: 'Missing required fields' });
@@ -611,17 +621,27 @@ app.post('/api/send', async (req, res) => {
             user_name: user_name.trim(),
             text: text.trim(),
             timestamp: timestamp || new Date().toLocaleTimeString('en-US', { hour12: false }),
-            created_at: Date.now()
+            created_at: Date.now(),
+            is_preview: is_preview || false,
+            font_family: font_family || null,  // Per-speaker font name
+            font_type: font_type || null  // Font type: "websafe", "google", or "custom"
         };
 
         const addStart = Date.now();
-        await addTranscription(room, transcription);
+        if (is_preview) {
+            // Previews are only broadcast, not stored
+            broadcastToRoom(room, transcription);
+        } else {
+            // Final transcriptions are stored and broadcast
+            await addTranscription(room, transcription);
+        }
         const addTime = Date.now() - addStart;
 
         const totalTime = Date.now() - requestStart;
-        console.log(`[${new Date().toISOString()}] Transcription received: "${text.substring(0, 50)}..." (verify: ${verifyTime}ms, add: ${addTime}ms, total: ${totalTime}ms)`);
+        const previewLabel = is_preview ? ' [PREVIEW]' : '';
+        console.log(`[${new Date().toISOString()}]${previewLabel} Transcription received: "${text.substring(0, 50)}..." (verify: ${verifyTime}ms, add: ${addTime}ms, total: ${totalTime}ms)`);
 
-        res.json({ status: 'ok', message: 'Transcription added' });
+        res.json({ status: 'ok', message: is_preview ? 'Preview broadcast' : 'Transcription added' });
     } catch (err) {
         console.error('Error in /api/send:', err);
         res.status(500).json({ error: err.message });
@@ -647,9 +667,115 @@ app.get('/api/list', async (req, res) => {
     }
 });
 
+// Upload fonts for a room
+app.post('/api/fonts', async (req, res) => {
+    try {
+        const { room, passphrase, fonts } = req.body;
+
+        if (!room || !passphrase) {
+            return res.status(400).json({ error: 'Missing room or passphrase' });
+        }
+
+        // Verify passphrase
+        const valid = await verifyPassphrase(room, passphrase);
+        if (!valid) {
+            return res.status(401).json({ error: 'Invalid passphrase' });
+        }
+
+        if (!fonts || !Array.isArray(fonts)) {
+            return res.status(400).json({ error: 'No fonts provided' });
+        }
+
+        // Initialize room fonts storage if needed
+        if (!roomFonts.has(room)) {
+            roomFonts.set(room, new Map());
+        }
+        const fontsMap = roomFonts.get(room);
+
+        // Process each font
+        let addedCount = 0;
+        for (const font of fonts) {
+            if (!font.name || !font.data || !font.mime) continue;
+
+            // Decode base64 font data
+            const fontData = Buffer.from(font.data, 'base64');
+            fontsMap.set(font.name, {
+                data: fontData,
+                mime: font.mime,
+                uploaded_at: Date.now()
+            });
+            addedCount++;
+            console.log(`[Fonts] Uploaded font "${font.name}" for room "${room}" (${fontData.length} bytes)`);
+        }
+
+        res.json({ status: 'ok', message: `${addedCount} font(s) uploaded`, fonts: Array.from(fontsMap.keys()) });
+    } catch (err) {
+        console.error('Error in /api/fonts:', err);
+        res.status(500).json({ error: err.message });
+    }
+});
+
+// Serve uploaded fonts
+app.get('/fonts/:room/:fontname', (req, res) => {
+    const { room, fontname } = req.params;
+
+    const fontsMap = roomFonts.get(room);
+    if (!fontsMap) {
+        return res.status(404).json({ error: 'Room not found' });
+    }
+
+    const font = fontsMap.get(fontname);
+    if (!font) {
+        return res.status(404).json({ error: 'Font not found' });
+    }
+
+    res.set('Content-Type', font.mime);
+    res.set('Cache-Control', 'public, max-age=3600');
+    res.send(font.data);
+});
+
+// List fonts for a room
+app.get('/api/fonts', (req, res) => {
+    const { room } = req.query;
+
+    if (!room) {
+        return res.status(400).json({ error: 'Missing room parameter' });
+    }
+
+    const fontsMap = roomFonts.get(room);
+    const fonts = fontsMap ? Array.from(fontsMap.keys()) : [];
+
+    res.json({ fonts });
+});
+
 // Serve display page
 app.get('/display', (req, res) => {
-    const { room = 'default', fade = '10', timestamps = 'true', maxlines = '50', fontsize = '16', fontfamily = 'Arial' } = req.query;
+    const {
+        room = 'default',
+        fade = '10',
+        timestamps = 'true',
+        maxlines = '50',
+        fontsize = '16',
+        fontfamily = 'Arial',
+        // New font source parameters
+        fontsource = 'websafe',  // websafe, google, or custom
+        websafefont = 'Arial',
+        googlefont = 'Roboto'
+    } = req.query;
+
+    // Determine the effective default font based on fontsource
+    let effectiveFont = fontfamily;  // Legacy fallback
+    if (fontsource === 'google' && googlefont) {
+        effectiveFont = googlefont;
+    } else if (fontsource === 'websafe' && websafefont) {
+        effectiveFont = websafefont;
+    }
+
+    // Generate Google Font link if needed
+    // Note: Google Fonts expects spaces as '+' in the URL, not %2B
+    const googleFontLink = fontsource === 'google' && googlefont
+        ? `<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=${googlefont.replace(/ /g, '+')}&display=swap">`
+        : '';
 
     res.send(`
 <!DOCTYPE html>
@@ -657,12 +783,16 @@ app.get('/display', (req, res) => {
 <head>
     <title>Multi-User Transcription Display</title>
     <meta charset="UTF-8">
+    ${googleFontLink}
+    <style id="custom-fonts">
+        /* Custom fonts will be injected here */
+    </style>
     <style>
         body {
             margin: 0;
             padding: 20px;
             background: transparent;
-            font-family: ${fontfamily}, sans-serif;
+            font-family: "${effectiveFont}", sans-serif;
             font-size: ${fontsize}px;
             color: white;
             overflow: hidden;
@@ -681,6 +811,14 @@ app.get('/display', (req, res) => {
         .transcription.fading {
             opacity: 0;
         }
+        .transcription.preview {
+            font-style: italic;
+        }
+        .preview-indicator {
+            color: #888;
+            font-size: 0.85em;
+            margin-right: 5px;
+        }
         .timestamp {
             color: #888;
             font-size: 0.9em;
@@ -721,11 +859,68 @@ app.get('/display', (req, res) => {
         const fadeAfter = ${fade};
         const showTimestamps = ${timestamps === 'true' || timestamps === '1'};
         const maxLines = ${maxlines};
+        const requestedFont = "${fontfamily}";
         const container = document.getElementById('transcriptions');
         const statusEl = document.getElementById('status');
         const userColors = new Map();
         let colorIndex = 0;
 
+        // Track preview elements by user for replacement
+        const userPreviews = new Map();
+
+        // Track loaded Google Fonts to avoid duplicate loading
+        const loadedGoogleFonts = new Set();
+
+        // Load a Google Font dynamically
+        function loadGoogleFont(fontName) {
+            if (loadedGoogleFonts.has(fontName)) return;
+            loadedGoogleFonts.add(fontName);
+
+            const link = document.createElement('link');
+            link.rel = 'stylesheet';
+            // Google Fonts expects spaces as '+' in the URL, not %2B
+            link.href = \`https://fonts.googleapis.com/css2?family=\${fontName.replace(/ /g, '+')}&display=swap\`;
+            document.head.appendChild(link);
+            console.log('Loading Google Font:', fontName);
+        }
+
+        // Load custom fonts for this room
+        async function loadCustomFonts() {
+            try {
+                const response = await fetch(\`/api/fonts?room=\${encodeURIComponent(room)}\`);
+                const data = await response.json();
+
+                if (data.fonts && data.fonts.length > 0) {
+                    let fontFaceCSS = '';
+                    for (const fontName of data.fonts) {
+                        // Determine format based on extension
+                        let format = 'truetype';
+                        if (fontName.endsWith('.woff2')) format = 'woff2';
+                        else if (fontName.endsWith('.woff')) format = 'woff';
+                        else if (fontName.endsWith('.otf')) format = 'opentype';
+
+                        // Font family name is filename without extension
+                        const familyName = fontName.replace(/\\.(ttf|otf|woff2?)\$/i, '');
+
+                        fontFaceCSS += \`
+                            @font-face {
+                                font-family: "\${familyName}";
+                                src: url("/fonts/\${encodeURIComponent(room)}/\${encodeURIComponent(fontName)}") format("\${format}");
+                                font-weight: normal;
+                                font-style: normal;
+                            }
+                        \`;
+                    }
+
+                    // Inject the font-face rules
+                    document.getElementById('custom-fonts').textContent = fontFaceCSS;
+                    console.log('Loaded custom fonts:', data.fonts);
+                }
+            } catch (err) {
+                console.error('Error loading custom fonts:', err);
+            }
+        }
+
         function getUserColor(userName) {
             if (!userColors.has(userName)) {
                 const hue = (colorIndex * 137.5) % 360;
@@ -737,32 +932,96 @@ app.get('/display', (req, res) => {
         }
 
         function addTranscription(data) {
-            const div = document.createElement('div');
-            div.className = 'transcription';
+            const isPreview = data.is_preview || false;
+            const userName = data.user_name || '';
+            const fontFamily = data.font_family || null;  // Per-speaker font name
+            const fontType = data.font_type || null;  // "websafe", "google", or "custom"
 
-            const userColor = getUserColor(data.user_name);
+            // Debug: Log received font info
+            if (fontFamily) {
+                console.log('Received transcription with font:', fontFamily, '(' + fontType + ')');
+            }
+
+            // Load Google Font if needed
+            if (fontType === 'google' && fontFamily) {
+                loadGoogleFont(fontFamily);
+            }
+
+            // Build font style string if font is set
+            // Use single quotes for font name to avoid conflict with style="" double quotes
+            const fontStyle = fontFamily ? \`font-family: '\${fontFamily}', sans-serif;\` : '';
+
+            // If this is a final transcription, remove any existing preview from this user
+            if (!isPreview && userPreviews.has(userName)) {
+                const previewEl = userPreviews.get(userName);
+                if (previewEl && previewEl.parentNode) {
+                    previewEl.remove();
+                }
+                userPreviews.delete(userName);
+            }
+
+            // If this is a preview, update existing preview or create new one
+            if (isPreview && userPreviews.has(userName)) {
+                const previewEl = userPreviews.get(userName);
+                if (previewEl && previewEl.parentNode) {
+                    // Update existing preview
+                    const userColor = getUserColor(userName);
+                    let html = '';
+                    if (showTimestamps && data.timestamp) {
+                        html += \`<span class="timestamp">[\${data.timestamp}]</span>\`;
+                    }
+                    if (userName) {
+                        html += \`<span class="user" style="color: \${userColor}">\${userName}:</span>\`;
+                    }
+                    html += \`<span class="preview-indicator">[...]</span>\`;
+                    html += \`<span class="text" style="\${fontStyle}">\${data.text}</span>\`;
+                    previewEl.innerHTML = html;
+                    return;
+                }
+            }
+
+            const div = document.createElement('div');
+            div.className = isPreview ? 'transcription preview' : 'transcription';
+
+            const userColor = getUserColor(userName);
             let html = '';
             if (showTimestamps && data.timestamp) {
                 html += \`<span class="timestamp">[\${data.timestamp}]</span>\`;
             }
-            if (data.user_name) {
-                html += \`<span class="user" style="color: \${userColor}">\${data.user_name}:</span>\`;
+            if (userName) {
+                html += \`<span class="user" style="color: \${userColor}">\${userName}:</span>\`;
             }
-            html += \`<span class="text">\${data.text}</span>\`;
+            if (isPreview) {
+                html += \`<span class="preview-indicator">[...]</span>\`;
+            }
+            html += \`<span class="text" style="\${fontStyle}">\${data.text}</span>\`;
 
             div.innerHTML = html;
             container.appendChild(div);
 
-            if (fadeAfter > 0) {
-                setTimeout(() => {
-                    div.classList.add('fading');
-                    setTimeout(() => div.remove(), 1000);
-                }, fadeAfter * 1000);
+            // Track preview element for this user
+            if (isPreview) {
+                userPreviews.set(userName, div);
+            } else {
+                // Only set fade timer for final transcriptions
+                if (fadeAfter > 0) {
+                    setTimeout(() => {
+                        div.classList.add('fading');
+                        setTimeout(() => div.remove(), 1000);
+                    }, fadeAfter * 1000);
+                }
             }
 
-            // Enforce max lines limit
+            // Enforce max lines limit (don't remove current previews)
             while (container.children.length > maxLines) {
-                container.removeChild(container.firstChild);
+                const first = container.firstChild;
+                // Don't remove if it's an active preview
+                let isActivePreview = false;
+                userPreviews.forEach((el) => {
+                    if (el === first) isActivePreview = true;
+                });
+                if (isActivePreview) break;
+                container.removeChild(first);
             }
         }
 
@@ -821,7 +1080,8 @@ app.get('/display', (req, res) => {
             };
         }
 
-        loadRecent().then(connect);
+        // Load custom fonts, then recent transcriptions, then connect WebSocket
+        loadCustomFonts().then(() => loadRecent()).then(connect);
     </script>
 </body>
 </html>

server/test-server.sh

@@ -1,160 +0,0 @@
-#!/bin/bash
-# Test script for multi-user transcription servers
-
-set -e
-
-echo "================================="
-echo "Multi-User Server Test Script"
-echo "================================="
-echo ""
-
-# Colors
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-YELLOW='\033[1;33m'
-NC='\033[0m' # No Color
-
-# Get server URL from user
-echo "What server are you testing?"
-echo "1) PHP Server"
-echo "2) Node.js Server"
-echo "3) Custom URL"
-read -p "Choice (1-3): " choice
-
-case $choice in
-    1)
-        read -p "Enter PHP server URL (e.g., https://example.com/transcription/server.php): " SERVER_URL
-        API_ENDPOINT="${SERVER_URL}?action=send"
-        ;;
-    2)
-        read -p "Enter Node.js server URL (e.g., http://localhost:3000): " SERVER_URL
-        API_ENDPOINT="${SERVER_URL}/api/send"
-        ;;
-    3)
-        read -p "Enter API endpoint URL: " API_ENDPOINT
-        ;;
-    *)
-        echo "Invalid choice"
-        exit 1
-        ;;
-esac
-
-# Get room details
-read -p "Room name [test]: " ROOM
-ROOM=${ROOM:-test}
-
-read -p "Passphrase [testpass]: " PASSPHRASE
-PASSPHRASE=${PASSPHRASE:-testpass}
-
-read -p "User name [TestUser]: " USER_NAME
-USER_NAME=${USER_NAME:-TestUser}
-
-echo ""
-echo "================================="
-echo "Testing connection to server..."
-echo "================================="
-echo "API Endpoint: $API_ENDPOINT"
-echo "Room: $ROOM"
-echo "User: $USER_NAME"
-echo ""
-
-# Test 1: Send a transcription
-echo "Test 1: Sending test transcription..."
-RESPONSE=$(curl -s -w "\n%{http_code}" -X POST "$API_ENDPOINT" \
-  -H "Content-Type: application/json" \
-  -d "{
-    \"room\": \"$ROOM\",
-    \"passphrase\": \"$PASSPHRASE\",
-    \"user_name\": \"$USER_NAME\",
-    \"text\": \"Test message from test script\",
-    \"timestamp\": \"$(date +%H:%M:%S)\"
-  }")
-
-HTTP_CODE=$(echo "$RESPONSE" | tail -n1)
-BODY=$(echo "$RESPONSE" | sed '$d')
-
-if [ "$HTTP_CODE" = "200" ]; then
-    echo -e "${GREEN}✓ Success!${NC} Server responded with 200 OK"
-    echo "Response: $BODY"
-else
-    echo -e "${RED}✗ Failed!${NC} Server responded with HTTP $HTTP_CODE"
-    echo "Response: $BODY"
-    exit 1
-fi
-
-echo ""
-
-# Test 2: Send multiple messages
-echo "Test 2: Sending 5 test messages..."
-for i in {1..5}; do
-    curl -s -X POST "$API_ENDPOINT" \
-      -H "Content-Type: application/json" \
-      -d "{
-        \"room\": \"$ROOM\",
-        \"passphrase\": \"$PASSPHRASE\",
-        \"user_name\": \"$USER_NAME\",
-        \"text\": \"Test message #$i\",
-        \"timestamp\": \"$(date +%H:%M:%S)\"
-      }" > /dev/null
-
-    echo -e "${GREEN}✓${NC} Sent message #$i"
-    sleep 0.5
-done
-
-echo ""
-
-# Test 3: List transcriptions (if available)
-echo "Test 3: Retrieving transcriptions..."
-
-if [ "$choice" = "1" ]; then
-    LIST_URL="${SERVER_URL}?action=list&room=$ROOM"
-elif [ "$choice" = "2" ]; then
-    LIST_URL="${SERVER_URL}/api/list?room=$ROOM"
-else
-    echo "Skipping list test for custom URL"
-    LIST_URL=""
-fi
-
-if [ -n "$LIST_URL" ]; then
-    LIST_RESPONSE=$(curl -s "$LIST_URL")
-    COUNT=$(echo "$LIST_RESPONSE" | grep -o "\"text\"" | wc -l)
-
-    if [ "$COUNT" -gt 0 ]; then
-        echo -e "${GREEN}✓ Success!${NC} Retrieved $COUNT transcriptions"
-        echo "$LIST_RESPONSE" | python3 -m json.tool 2>/dev/null || echo "$LIST_RESPONSE"
-    else
-        echo -e "${YELLOW}⚠ Warning:${NC} No transcriptions retrieved"
-        echo "$LIST_RESPONSE"
-    fi
-fi
-
-echo ""
-echo "================================="
-echo "Test Complete!"
-echo "================================="
-echo ""
-echo "Next steps:"
-echo ""
-
-if [ "$choice" = "1" ]; then
-    echo "1. Open this URL in OBS Browser Source:"
-    echo "   ${SERVER_URL%server.php}display-polling.php?room=$ROOM&fade=10"
-    echo ""
-    echo "2. Or test in your browser first:"
-    echo "   ${SERVER_URL%server.php}display-polling.php?room=$ROOM"
-elif [ "$choice" = "2" ]; then
-    echo "1. Open this URL in OBS Browser Source:"
-    echo "   ${SERVER_URL}/display?room=$ROOM&fade=10"
-    echo ""
-    echo "2. Or test in your browser first:"
-    echo "   ${SERVER_URL}/display?room=$ROOM"
-fi
-
-echo ""
-echo "3. Configure desktop app with these settings:"
-echo "   - Server URL: $API_ENDPOINT"
-echo "   - Room: $ROOM"
-echo "   - Passphrase: $PASSPHRASE"
-echo ""
-echo "4. Start transcribing!"
-echo ""

server/transcription-service/README.md

@@ -0,0 +1,173 @@
+# Remote Transcription Service
+
+A standalone GPU-accelerated transcription service that accepts audio streams over WebSocket and returns transcriptions. Designed for offloading transcription processing from client machines to a GPU-equipped server.
+
+## Features
+
+- WebSocket-based audio streaming
+- API key authentication
+- GPU acceleration (CUDA)
+- Multiple simultaneous clients
+- Health check endpoints
+
+## Requirements
+
+- Python 3.10+
+- NVIDIA GPU with CUDA support (recommended)
+- 4GB+ VRAM for base model, 8GB+ for large models
+
+## Installation
+
+```bash
+cd server/transcription-service
+
+# Create virtual environment
+python -m venv venv
+source venv/bin/activate  # Linux/Mac
+# or: venv\Scripts\activate  # Windows
+
+# Install dependencies
+pip install -r requirements.txt
+
+# For GPU support, install CUDA version of PyTorch
+pip install torch --index-url https://download.pytorch.org/whl/cu121
+```
+
+## Configuration
+
+Set environment variables before starting:
+
+```bash
+# Required: API key(s) for authentication
+export TRANSCRIPTION_API_KEY="your-secret-key"
+
+# Or multiple keys (comma-separated)
+export TRANSCRIPTION_API_KEYS="key1,key2,key3"
+
+# Optional: Model selection (default: base.en)
+export TRANSCRIPTION_MODEL="base.en"
+```
+
+## Running
+
+```bash
+# Start the service
+python server.py --host 0.0.0.0 --port 8765
+
+# Or with custom model
+python server.py --host 0.0.0.0 --port 8765 --model medium.en
+```
+
+## API Endpoints
+
+### Health Check
+```
+GET /
+GET /health
+```
+
+### WebSocket Transcription
+```
+WS /ws/transcribe
+```
+
+## WebSocket Protocol
+
+1. **Authentication**
+   ```json
+   // Client sends
+   {"type": "auth", "api_key": "your-key"}
+
+   // Server responds
+   {"type": "auth_result", "success": true, "message": "..."}
+   ```
+
+2. **Send Audio**
+   ```json
+   // Client sends (audio as base64-encoded float32 numpy array)
+   {"type": "audio", "data": "base64...", "sample_rate": 16000}
+
+   // Server responds
+   {"type": "transcription", "text": "Hello world", "is_preview": false, "timestamp": "..."}
+   ```
+
+3. **Keep-alive**
+   ```json
+   // Client sends
+   {"type": "ping"}
+
+   // Server responds
+   {"type": "pong"}
+   ```
+
+4. **Disconnect**
+   ```json
+   // Client sends
+   {"type": "end"}
+   ```
+
+## Client Integration
+
+The Local Transcription app includes a remote transcription client. Configure in Settings:
+
+1. Enable "Remote Processing"
+2. Set Server URL: `ws://your-server:8765/ws/transcribe`
+3. Enter your API key
+
+## Deployment
+
+### Docker
+
+```dockerfile
+FROM python:3.11-slim
+
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY server.py .
+
+ENV TRANSCRIPTION_MODEL=base.en
+EXPOSE 8765
+
+CMD ["python", "server.py", "--host", "0.0.0.0", "--port", "8765"]
+```
+
+### Systemd Service
+
+```ini
+[Unit]
+Description=Remote Transcription Service
+After=network.target
+
+[Service]
+Type=simple
+User=transcription
+WorkingDirectory=/opt/transcription-service
+Environment=TRANSCRIPTION_API_KEY=your-key
+Environment=TRANSCRIPTION_MODEL=base.en
+ExecStart=/opt/transcription-service/venv/bin/python server.py
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
+```
+
+## Models
+
+Available Whisper models (larger = better quality, slower):
+
+| Model | Parameters | VRAM | Speed |
+|-------|-----------|------|-------|
+| tiny.en | 39M | ~1GB | Fastest |
+| base.en | 74M | ~1GB | Fast |
+| small.en | 244M | ~2GB | Moderate |
+| medium.en | 769M | ~5GB | Slow |
+| large-v3 | 1550M | ~10GB | Slowest |
+
+## Security Notes
+
+- Always use API key authentication in production
+- Use HTTPS/WSS in production (via reverse proxy)
+- Rate limit connections if needed
+- Monitor GPU usage to prevent overload

server/transcription-service/requirements.txt

@@ -0,0 +1,8 @@
+fastapi>=0.100.0
+uvicorn>=0.22.0
+websockets>=11.0
+numpy>=1.24.0
+pydantic>=2.0.0
+faster-whisper>=0.10.0
+RealtimeSTT>=0.1.0
+torch>=2.0.0

server/transcription-service/server.py

@@ -0,0 +1,366 @@
+"""
+Remote Transcription Service
+
+A standalone FastAPI WebSocket server that accepts audio streams and returns transcriptions.
+Designed to run on a GPU-equipped server for offloading transcription processing.
+
+Usage:
+    python server.py [--host HOST] [--port PORT] [--model MODEL]
+
+Environment variables:
+    TRANSCRIPTION_API_KEY: Required API key for authentication
+    TRANSCRIPTION_MODEL: Whisper model to use (default: base.en)
+"""
+
+import asyncio
+import argparse
+import os
+import sys
+import json
+import base64
+import logging
+from datetime import datetime
+from pathlib import Path
+from typing import Optional, Dict, Set
+from threading import Thread, Lock
+import numpy as np
+
+from fastapi import FastAPI, WebSocket, WebSocketDisconnect, HTTPException, Depends
+from fastapi.responses import JSONResponse
+from fastapi.middleware.cors import CORSMiddleware
+from pydantic import BaseModel
+import uvicorn
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+)
+logger = logging.getLogger(__name__)
+
+
+# API Key authentication
+API_KEYS: Set[str] = set()
+
+
+def load_api_keys():
+    """Load API keys from environment variable."""
+    global API_KEYS
+    keys_env = os.environ.get('TRANSCRIPTION_API_KEYS', '')
+    if keys_env:
+        API_KEYS = set(key.strip() for key in keys_env.split(',') if key.strip())
+
+    # Also support single key
+    single_key = os.environ.get('TRANSCRIPTION_API_KEY', '')
+    if single_key:
+        API_KEYS.add(single_key)
+
+    if not API_KEYS:
+        logger.warning("No API keys configured. Set TRANSCRIPTION_API_KEY or TRANSCRIPTION_API_KEYS environment variable.")
+        logger.warning("Service will accept all connections (INSECURE for production).")
+
+
+def verify_api_key(api_key: str) -> bool:
+    """Verify if the API key is valid."""
+    if not API_KEYS:
+        return True  # No authentication if no keys configured
+    return api_key in API_KEYS
+
+
+app = FastAPI(
+    title="Remote Transcription Service",
+    description="GPU-accelerated speech-to-text transcription service",
+    version="1.0.0"
+)
+
+# Enable CORS for all origins (configure appropriately for production)
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+class TranscriptionEngine:
+    """Manages the transcription engine with thread-safe access."""
+
+    def __init__(self, model: str = "base.en", device: str = "auto"):
+        self.model_name = model
+        self.device = device
+        self.recorder = None
+        self.lock = Lock()
+        self.is_initialized = False
+
+    def initialize(self):
+        """Initialize the transcription engine."""
+        if self.is_initialized:
+            return True
+
+        try:
+            from RealtimeSTT import AudioToTextRecorder
+
+            # Determine device
+            if self.device == "auto":
+                import torch
+                if torch.cuda.is_available():
+                    self.device = "cuda"
+                else:
+                    self.device = "cpu"
+
+            logger.info(f"Initializing transcription engine with model={self.model_name}, device={self.device}")
+
+            # Create recorder with minimal configuration
+            # We'll feed audio directly, not capture from microphone
+            self.recorder = AudioToTextRecorder(
+                model=self.model_name,
+                language="en",
+                device=self.device,
+                compute_type="default",
+                input_device_index=None,  # No mic capture
+                silero_sensitivity=0.4,
+                webrtc_sensitivity=3,
+                post_speech_silence_duration=0.3,
+                min_length_of_recording=0.5,
+                enable_realtime_transcription=True,
+                realtime_model_type="tiny.en",
+            )
+
+            self.is_initialized = True
+            logger.info("Transcription engine initialized successfully")
+            return True
+
+        except Exception as e:
+            logger.error(f"Failed to initialize transcription engine: {e}")
+            return False
+
+    def transcribe(self, audio_data: np.ndarray, sample_rate: int = 16000) -> Optional[str]:
+        """
+        Transcribe audio data.
+
+        Args:
+            audio_data: Audio data as numpy array
+            sample_rate: Sample rate of the audio
+
+        Returns:
+            Transcribed text or None if failed
+        """
+        with self.lock:
+            if not self.is_initialized:
+                return None
+
+            try:
+                # Use faster-whisper directly for one-shot transcription
+                from faster_whisper import WhisperModel
+
+                if not hasattr(self, '_whisper_model'):
+                    self._whisper_model = WhisperModel(
+                        self.model_name,
+                        device=self.device,
+                        compute_type="default"
+                    )
+
+                # Transcribe
+                segments, info = self._whisper_model.transcribe(
+                    audio_data,
+                    beam_size=5,
+                    language="en"
+                )
+
+                # Combine segments
+                text = " ".join(segment.text for segment in segments)
+                return text.strip()
+
+            except Exception as e:
+                logger.error(f"Transcription error: {e}")
+                return None
+
+
+# Global transcription engine
+engine: Optional[TranscriptionEngine] = None
+
+
+class ClientConnection:
+    """Represents an active client connection."""
+
+    def __init__(self, websocket: WebSocket, client_id: str):
+        self.websocket = websocket
+        self.client_id = client_id
+        self.audio_buffer = []
+        self.sample_rate = 16000
+        self.connected_at = datetime.now()
+
+
+# Active connections
+active_connections: Dict[str, ClientConnection] = {}
+
+
+@app.on_event("startup")
+async def startup_event():
+    """Initialize service on startup."""
+    load_api_keys()
+
+    global engine
+    model = os.environ.get('TRANSCRIPTION_MODEL', 'base.en')
+    engine = TranscriptionEngine(model=model)
+
+    # Initialize in background thread to not block startup
+    def init_engine():
+        engine.initialize()
+
+    Thread(target=init_engine, daemon=True).start()
+
+    logger.info("Remote Transcription Service started")
+
+
+@app.get("/")
+async def root():
+    """Health check endpoint."""
+    return {
+        "service": "Remote Transcription Service",
+        "status": "running",
+        "model": engine.model_name if engine else "not loaded",
+        "device": engine.device if engine else "unknown",
+        "active_connections": len(active_connections)
+    }
+
+
+@app.get("/health")
+async def health():
+    """Detailed health check."""
+    return {
+        "status": "healthy" if engine and engine.is_initialized else "initializing",
+        "model": engine.model_name if engine else None,
+        "device": engine.device if engine else None,
+        "initialized": engine.is_initialized if engine else False,
+        "connections": len(active_connections)
+    }
+
+
+@app.websocket("/ws/transcribe")
+async def websocket_transcribe(websocket: WebSocket):
+    """
+    WebSocket endpoint for audio transcription.
+
+    Protocol:
+    1. Client sends: {"type": "auth", "api_key": "your-key"}
+    2. Server responds: {"type": "auth_result", "success": true/false}
+    3. Client sends audio chunks: {"type": "audio", "data": base64_audio, "sample_rate": 16000}
+    4. Server responds with transcription: {"type": "transcription", "text": "...", "is_preview": false}
+    5. Client can send: {"type": "end"} to close connection
+    """
+    await websocket.accept()
+    client_id = f"client_{id(websocket)}_{datetime.now().timestamp()}"
+    authenticated = False
+
+    logger.info(f"New WebSocket connection: {client_id}")
+
+    try:
+        while True:
+            data = await websocket.receive_text()
+            message = json.loads(data)
+            msg_type = message.get("type", "")
+
+            if msg_type == "auth":
+                # Authenticate client
+                api_key = message.get("api_key", "")
+                if verify_api_key(api_key):
+                    authenticated = True
+                    active_connections[client_id] = ClientConnection(websocket, client_id)
+                    await websocket.send_json({
+                        "type": "auth_result",
+                        "success": True,
+                        "message": "Authentication successful"
+                    })
+                    logger.info(f"Client {client_id} authenticated")
+                else:
+                    await websocket.send_json({
+                        "type": "auth_result",
+                        "success": False,
+                        "message": "Invalid API key"
+                    })
+                    logger.warning(f"Client {client_id} failed authentication")
+                    await websocket.close(code=4001, reason="Invalid API key")
+                    return
+
+            elif msg_type == "audio":
+                if not authenticated:
+                    await websocket.send_json({
+                        "type": "error",
+                        "message": "Not authenticated"
+                    })
+                    continue
+
+                # Decode audio data
+                audio_b64 = message.get("data", "")
+                sample_rate = message.get("sample_rate", 16000)
+
+                if audio_b64:
+                    try:
+                        audio_bytes = base64.b64decode(audio_b64)
+                        audio_data = np.frombuffer(audio_bytes, dtype=np.float32)
+
+                        # Transcribe
+                        if engine and engine.is_initialized:
+                            text = engine.transcribe(audio_data, sample_rate)
+                            if text:
+                                await websocket.send_json({
+                                    "type": "transcription",
+                                    "text": text,
+                                    "is_preview": False,
+                                    "timestamp": datetime.now().isoformat()
+                                })
+                        else:
+                            await websocket.send_json({
+                                "type": "error",
+                                "message": "Transcription engine not ready"
+                            })
+                    except Exception as e:
+                        logger.error(f"Audio processing error: {e}")
+                        await websocket.send_json({
+                            "type": "error",
+                            "message": f"Audio processing error: {str(e)}"
+                        })
+
+            elif msg_type == "end":
+                logger.info(f"Client {client_id} requested disconnect")
+                break
+
+            elif msg_type == "ping":
+                await websocket.send_json({"type": "pong"})
+
+    except WebSocketDisconnect:
+        logger.info(f"Client {client_id} disconnected")
+    except Exception as e:
+        logger.error(f"WebSocket error for {client_id}: {e}")
+    finally:
+        if client_id in active_connections:
+            del active_connections[client_id]
+
+
+def main():
+    """Main entry point."""
+    parser = argparse.ArgumentParser(description="Remote Transcription Service")
+    parser.add_argument("--host", default="0.0.0.0", help="Host to bind to")
+    parser.add_argument("--port", type=int, default=8765, help="Port to bind to")
+    parser.add_argument("--model", default="base.en", help="Whisper model to use")
+
+    args = parser.parse_args()
+
+    # Set model from command line
+    os.environ.setdefault('TRANSCRIPTION_MODEL', args.model)
+
+    logger.info(f"Starting Remote Transcription Service on {args.host}:{args.port}")
+    logger.info(f"Model: {args.model}")
+
+    uvicorn.run(
+        app,
+        host=args.host,
+        port=args.port,
+        log_level="info"
+    )
+
+
+if __name__ == "__main__":
+    main()

server/web_display.py

@@ -1,8 +1,9 @@
 """Web server for displaying transcriptions in a browser (for OBS browser source)."""
 
 import asyncio
+from pathlib import Path
 from fastapi import FastAPI, WebSocket
-from fastapi.responses import HTMLResponse
+from fastapi.responses import HTMLResponse, FileResponse
 from typing import List, Optional
 import json
 from datetime import datetime
@@ -11,7 +12,11 @@ from datetime import datetime
 class TranscriptionWebServer:
     """Web server for displaying transcriptions."""
 
-    def __init__(self, host: str = "127.0.0.1", port: int = 8080, show_timestamps: bool = True, fade_after_seconds: int = 10, max_lines: int = 50, font_family: str = "Arial", font_size: int = 16):
+    def __init__(self, host: str = "127.0.0.1", port: int = 8080, show_timestamps: bool = True,
+                 fade_after_seconds: int = 10, max_lines: int = 50, font_family: str = "Arial",
+                 font_size: int = 16, fonts_dir: Optional[Path] = None,
+                 font_source: str = "System Font", websafe_font: str = "Arial",
+                 google_font: str = "Roboto"):
         """
         Initialize web server.
 
@@ -21,8 +26,12 @@ class TranscriptionWebServer:
             show_timestamps: Whether to show timestamps in transcriptions
             fade_after_seconds: Time in seconds before transcriptions fade out (0 = never fade)
             max_lines: Maximum number of lines to display at once
-            font_family: Font family for display
+            font_family: Font family for display (system font)
             font_size: Font size in pixels
+            fonts_dir: Directory containing custom font files
+            font_source: Font source type ("System Font", "Web-Safe", "Google Font")
+            websafe_font: Web-safe font name
+            google_font: Google Font name
         """
         self.host = host
         self.port = port
@@ -31,6 +40,10 @@ class TranscriptionWebServer:
         self.max_lines = max_lines
         self.font_family = font_family
         self.font_size = font_size
+        self.fonts_dir = fonts_dir
+        self.font_source = font_source
+        self.websafe_font = websafe_font
+        self.google_font = google_font
         self.app = FastAPI()
         self.active_connections: List[WebSocket] = []
         self.transcriptions = []  # Store recent transcriptions
@@ -46,6 +59,23 @@ class TranscriptionWebServer:
             """Serve the transcription display page."""
             return self._get_html()
 
+        @self.app.get("/fonts/{font_file}")
+        async def serve_font(font_file: str):
+            """Serve custom font files."""
+            if self.fonts_dir:
+                font_path = self.fonts_dir / font_file
+                if font_path.exists() and font_path.suffix.lower() in {'.ttf', '.otf', '.woff', '.woff2'}:
+                    # Determine MIME type
+                    mime_types = {
+                        '.ttf': 'font/ttf',
+                        '.otf': 'font/otf',
+                        '.woff': 'font/woff',
+                        '.woff2': 'font/woff2'
+                    }
+                    media_type = mime_types.get(font_path.suffix.lower(), 'application/octet-stream')
+                    return FileResponse(font_path, media_type=media_type)
+            return HTMLResponse(status_code=404, content="Font not found")
+
         @self.app.websocket("/ws")
         async def websocket_endpoint(websocket: WebSocket):
             """WebSocket endpoint for real-time updates."""
@@ -64,19 +94,70 @@ class TranscriptionWebServer:
             except:
                 self.active_connections.remove(websocket)
 
+    def _get_font_face_css(self) -> str:
+        """Generate @font-face CSS rules for custom fonts."""
+        if not self.fonts_dir or not self.fonts_dir.exists():
+            return ""
+
+        css_rules = []
+        font_extensions = {'.ttf', '.otf', '.woff', '.woff2'}
+        format_map = {
+            '.ttf': 'truetype',
+            '.otf': 'opentype',
+            '.woff': 'woff',
+            '.woff2': 'woff2'
+        }
+
+        for font_file in self.fonts_dir.iterdir():
+            if font_file.suffix.lower() in font_extensions:
+                font_name = font_file.stem
+                font_format = format_map.get(font_file.suffix.lower(), 'truetype')
+                css_rules.append(f"""
+        @font-face {{
+            font-family: '{font_name}';
+            src: url('/fonts/{font_file.name}') format('{font_format}');
+            font-weight: normal;
+            font-style: normal;
+        }}""")
+
+        return "\n".join(css_rules)
+
+    def _get_effective_font(self) -> str:
+        """Get the effective font family based on font_source setting."""
+        if self.font_source == "Google Font" and self.google_font:
+            return self.google_font
+        elif self.font_source == "Web-Safe" and self.websafe_font:
+            return self.websafe_font
+        else:
+            return self.font_family
+
+    def _get_google_font_link(self) -> str:
+        """Generate Google Fonts link tag if using Google Font."""
+        if self.font_source == "Google Font" and self.google_font:
+            font_name = self.google_font.replace(' ', '+')
+            return f'<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family={font_name}&display=swap">'
+        return ""
+
     def _get_html(self) -> str:
         """Generate HTML for transcription display."""
+        # Generate custom font CSS
+        font_face_css = self._get_font_face_css()
+        google_font_link = self._get_google_font_link()
+        effective_font = self._get_effective_font()
+
         return f"""
 <!DOCTYPE html>
 <html>
 <head>
     <title>Transcription Display</title>
+    {google_font_link}
     <style>
+        {font_face_css}
         body {{
             margin: 0;
             padding: 20px;
             background: transparent;
-            font-family: {self.font_family}, sans-serif;
+            font-family: '{effective_font}', sans-serif;
             font-size: {self.font_size}px;
             color: white;
             overflow: hidden;
@@ -108,6 +189,14 @@ class TranscriptionWebServer:
         .text {{
             color: white;
         }}
+        .transcription.preview {{
+            font-style: italic;
+        }}
+        .preview-indicator {{
+            color: #888;
+            font-size: 0.85em;
+            margin-right: 5px;
+        }}
         @keyframes slideIn {{
             from {{
                 opacity: 0;
@@ -129,9 +218,15 @@ class TranscriptionWebServer:
         const fadeAfterSeconds = {self.fade_after_seconds};
         const maxLines = {self.max_lines};
 
+        let currentPreviewElement = null;
+
         ws.onmessage = (event) => {{
             const data = JSON.parse(event.data);
-            addTranscription(data);
+            if (data.is_preview) {{
+                handlePreview(data);
+            }} else {{
+                addTranscription(data);
+            }}
         }};
 
         ws.onclose = () => {{
@@ -146,35 +241,86 @@ class TranscriptionWebServer:
             }}
         }}, 30000);
 
-        function addTranscription(data) {{
+        function handlePreview(data) {{
+            // If there's already a preview, update it
+            if (currentPreviewElement) {{
+                updatePreviewContent(currentPreviewElement, data);
+            }} else {{
+                // Create new preview element
+                currentPreviewElement = createTranscriptionElement(data, true);
+                container.appendChild(currentPreviewElement);
+            }}
+
+            // Enforce max lines limit
+            while (container.children.length > maxLines) {{
+                const first = container.firstChild;
+                if (first === currentPreviewElement) break; // Don't remove current preview
+                container.removeChild(first);
+            }}
+        }}
+
+        function updatePreviewContent(element, data) {{
+            let html = '';
+            if (data.timestamp) {{
+                html += `<span class="timestamp">[${{data.timestamp}}]</span>`;
+            }}
+            if (data.user_name && data.user_name.trim()) {{
+                html += `<span class="user">${{data.user_name}}:</span>`;
+            }}
+            html += `<span class="preview-indicator">[...]</span>`;
+            html += `<span class="text">${{data.text}}</span>`;
+            element.innerHTML = html;
+        }}
+
+        function createTranscriptionElement(data, isPreview) {{
             const div = document.createElement('div');
-            div.className = 'transcription';
+            div.className = isPreview ? 'transcription preview' : 'transcription';
 
             let html = '';
             if (data.timestamp) {{
                 html += `<span class="timestamp">[${{data.timestamp}}]</span>`;
             }}
-            if (data.user_name) {{
+            if (data.user_name && data.user_name.trim()) {{
                 html += `<span class="user">${{data.user_name}}:</span>`;
             }}
+            if (isPreview) {{
+                html += `<span class="preview-indicator">[...]</span>`;
+            }}
             html += `<span class="text">${{data.text}}</span>`;
 
             div.innerHTML = html;
-            container.appendChild(div);
+            return div;
+        }}
 
-            // Set up fade-out if enabled
-            if (fadeAfterSeconds > 0) {{
-                setTimeout(() => {{
-                    // Start fade animation
-                    div.classList.add('fading');
+        function addTranscription(data) {{
+            // If there's a preview, replace it with final transcription
+            if (currentPreviewElement) {{
+                currentPreviewElement.className = 'transcription';
+                let html = '';
+                if (data.timestamp) {{
+                    html += `<span class="timestamp">[${{data.timestamp}}]</span>`;
+                }}
+                if (data.user_name && data.user_name.trim()) {{
+                    html += `<span class="user">${{data.user_name}}:</span>`;
+                }}
+                html += `<span class="text">${{data.text}}</span>`;
+                currentPreviewElement.innerHTML = html;
 
-                    // Remove element after fade completes
-                    setTimeout(() => {{
-                        if (div.parentNode === container) {{
-                            container.removeChild(div);
-                        }}
-                    }}, 1000); // Match the CSS transition duration
-                }}, fadeAfterSeconds * 1000);
+                // Set up fade-out for the final transcription
+                if (fadeAfterSeconds > 0) {{
+                    setupFadeOut(currentPreviewElement);
+                }}
+
+                currentPreviewElement = null;
+            }} else {{
+                // No preview to replace, add new element
+                const div = createTranscriptionElement(data, false);
+                container.appendChild(div);
+
+                // Set up fade-out if enabled
+                if (fadeAfterSeconds > 0) {{
+                    setupFadeOut(div);
+                }}
             }}
 
             // Enforce max lines limit
@@ -182,6 +328,20 @@ class TranscriptionWebServer:
                 container.removeChild(container.firstChild);
             }}
         }}
+
+        function setupFadeOut(element) {{
+            setTimeout(() => {{
+                // Start fade animation
+                element.classList.add('fading');
+
+                // Remove element after fade completes
+                setTimeout(() => {{
+                    if (element.parentNode === container) {{
+                        container.removeChild(element);
+                    }}
+                }}, 1000); // Match the CSS transition duration
+            }}, fadeAfterSeconds * 1000);
+        }}
     </script>
 </body>
 </html>
@@ -225,6 +385,43 @@ class TranscriptionWebServer:
         for conn in disconnected:
             self.active_connections.remove(conn)
 
+    async def broadcast_preview(self, text: str, user_name: str = "", timestamp: Optional[datetime] = None):
+        """
+        Broadcast a preview transcription to all connected clients.
+        Preview transcriptions are shown in italics and will be replaced by final.
+
+        Args:
+            text: Preview transcription text
+            user_name: User/speaker name
+            timestamp: Timestamp of transcription
+        """
+        if timestamp is None:
+            timestamp = datetime.now()
+
+        trans_data = {
+            "text": text,
+            "user_name": user_name,
+            "is_preview": True,  # Flag to indicate this is a preview
+        }
+
+        # Only include timestamp if enabled
+        if self.show_timestamps:
+            trans_data["timestamp"] = timestamp.strftime("%H:%M:%S")
+
+        # Don't store previews in transcriptions list (they're temporary)
+
+        # Broadcast to all connected clients
+        disconnected = []
+        for connection in self.active_connections:
+            try:
+                await connection.send_json(trans_data)
+            except:
+                disconnected.append(connection)
+
+        # Remove disconnected clients
+        for conn in disconnected:
+            self.active_connections.remove(conn)
+
     async def start(self):
         """Start the web server."""
         import uvicorn

version.py

@@ -0,0 +1,15 @@
+"""Version information for Local Transcription."""
+
+__version__ = "1.2.4"
+__version_info__ = (1, 2, 4)
+
+# Version history:
+# 1.0.0 - Initial release with:
+#   - Real-time speech-to-text transcription using Whisper models
+#   - Local web display for OBS browser source integration
+#   - Multi-user server sync with Node.js backend
+#   - Two-stage transcription (fast preview + refined final)
+#   - Custom font support (local and forwarded to sync server)
+#   - Single instance prevention
+#   - Fast speaker mode for continuous speech
+#   - Remote GPU processing offload support