Initial commit: Camera Viewer with Frigate alerts

Features:
- 8-camera WebRTC grid using go2rtc
- MQTT subscription to Frigate events
- Auto-fullscreen on person detection (Front_Porch)
- SSE for real-time browser updates
- Touch-friendly tablet interface
- Wake lock to keep screen on
- Auto-dismiss after 30 seconds

app/config.py

@@ -0,0 +1,35 @@
+"""Camera Viewer Configuration"""
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    # MQTT Settings (Home Assistant)
+    MQTT_HOST: str = "192.168.1.50"
+    MQTT_PORT: int = 1883
+    MQTT_USER: str = "mqtt"
+    MQTT_PASSWORD: str = "11xpfcryan"
+
+    # go2rtc Settings
+    GO2RTC_HOST: str = "192.168.1.241:1985"
+
+    # Alert Settings
+    ALERT_CAMERA: str = "Front_Porch"
+    AUTO_DISMISS_SECONDS: int = 30
+
+    # Camera list (name: display_name)
+    CAMERAS: dict = {
+        "Front_Porch": "Front Porch",
+        "FPE": "Front Yard",
+        "Driveway": "Driveway",
+        "Driveway_door": "Driveway Door",
+        "Porch_Downstairs": "Porch Downstairs",
+        "Street_side": "Street Side",
+        "Backyard": "Backyard",
+        "House_side": "House Side",
+    }
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()