Major PWA and mobile UI improvements

- Fixed PWA installation on Android by correcting manifest.json icon configuration
- Made UI mobile-friendly with compact layout and sticky record button
- Implemented auto-translation after transcription stops
- Updated branding from 'Voice Translator' to 'Talk2Me' throughout
- Added reverse proxy support with ProxyFix middleware
- Created diagnostic tools for PWA troubleshooting
- Added proper HTTP headers for service worker and manifest
- Improved mobile CSS with responsive design
- Fixed JavaScript bundling with webpack configuration
- Updated service worker cache versioning
- Added comprehensive PWA documentation

These changes ensure the app works properly as a PWA on Android devices
and provides a better mobile user experience.

.env.template

@@ -0,0 +1,54 @@
+# Talk2Me Environment Configuration Template
+# Copy this file to .env and update with your values
+
+# Flask Configuration
+FLASK_ENV=production
+SECRET_KEY=your-secret-key-here-change-this
+
+# Security Settings for HTTPS/Reverse Proxy
+SESSION_COOKIE_SECURE=true
+SESSION_COOKIE_SAMESITE=Lax
+PREFERRED_URL_SCHEME=https
+
+# TTS Server Configuration
+TTS_SERVER_URL=http://localhost:5050/v1/audio/speech
+TTS_API_KEY=your-tts-api-key-here
+
+# Whisper Configuration
+WHISPER_MODEL_SIZE=base
+WHISPER_DEVICE=auto
+
+# Ollama Configuration
+OLLAMA_HOST=http://localhost:11434
+OLLAMA_MODEL=gemma3:27b
+
+# Admin Configuration
+ADMIN_TOKEN=your-admin-token-here-change-this
+
+# CORS Configuration (comma-separated)
+CORS_ORIGINS=https://talk2me.dr74.net,http://localhost:5000
+ADMIN_CORS_ORIGINS=https://talk2me.dr74.net
+
+# Rate Limiting
+RATE_LIMIT_ENABLED=true
+RATE_LIMIT_STORAGE_URL=memory://
+
+# Feature Flags
+ENABLE_PUSH_NOTIFICATIONS=true
+ENABLE_OFFLINE_MODE=true
+ENABLE_STREAMING=true
+ENABLE_MULTI_SPEAKER=true
+
+# Logging
+LOG_LEVEL=INFO
+LOG_FILE=logs/talk2me.log
+
+# Upload Configuration
+UPLOAD_FOLDER=/tmp/talk2me_uploads
+MAX_CONTENT_LENGTH=52428800
+MAX_AUDIO_SIZE=26214400
+MAX_JSON_SIZE=1048576
+
+# Worker Configuration (for Gunicorn)
+WORKER_CONNECTIONS=1000
+WORKER_TIMEOUT=120