feat(displays): add display detection and management (sway) with daemon APIs and UI controls

ecoos_daemon/ts/daemon/system-info.ts

@@ -52,6 +52,18 @@ export interface AudioDevice {
   isDefault: boolean;
 }
 
+export interface DisplayInfo {
+  name: string;           // e.g., "DP-1", "HDMI-A-1", "HEADLESS-1"
+  make: string;           // Manufacturer
+  model: string;          // Model name
+  serial: string;         // Serial number
+  active: boolean;        // Currently enabled
+  width: number;          // Resolution width
+  height: number;         // Resolution height
+  refreshRate: number;    // Hz
+  isPrimary: boolean;     // Has the focused window (kiosk)
+}
+
 export interface SystemInfoData {
   hostname: string;
   cpu: CpuInfo;