Keep monitor always on and switch Home layout to horizontal 90/10

- Removed ScreenManager idle sleep entirely (constructor no longer starts
  the idle monitor, setIdleTimeout is now a no-op, unused fields and the
  private startIdleMonitor method removed). Display never sleeps; the
  photo frame provides the idle visual instead.
- DashboardContent now uses flex-row: calendar 90% wide, todo 10% wide.

electron/services/ScreenManager.ts

@@ -12,10 +12,8 @@ const DBUS_ENV = {
 
 export class ScreenManager {
   private window: BrowserWindow;
-  private idleTimeout: number = 300000; // 5 minutes default
   private idleTimer: NodeJS.Timeout | null = null;
   private isScreenOn: boolean = true;
-  private lastActivity: number = Date.now();
   private screenControlAvailable: boolean = true;
   private isWayland: boolean = false;
 
@@ -23,7 +21,8 @@ export class ScreenManager {
     this.window = window;
     this.detectDisplayServer();
     this.setupActivityListeners();
-    this.startIdleMonitor();
+    // Idle monitor intentionally disabled: monitor stays on; photo frame
+    // handles the visual idle state instead.
   }
 
   private detectDisplayServer(): void {
@@ -44,31 +43,19 @@ export class ScreenManager {
 
   // Called from renderer when touch/click detected
   public handleUserActivity(): void {
-    this.lastActivity = Date.now();
-    // Always try to wake the screen on touch/click - user is actively interacting
     if (!this.isScreenOn) {
       this.wakeScreen();
     }
   }
 
-  private startIdleMonitor(): void {
-    this.idleTimer = setInterval(() => {
-      const idleTime = Date.now() - this.lastActivity;
-      if (idleTime >= this.idleTimeout && this.isScreenOn && this.screenControlAvailable) {
-        this.sleepScreen();
-      }
-    }, 30000); // Check every 30 seconds (not 10) to reduce spam
-  }
-
   private resetIdleTimer(): void {
-    this.lastActivity = Date.now();
     if (!this.isScreenOn) {
       this.wakeScreen();
     }
   }
 
-  setIdleTimeout(timeout: number): void {
-    this.idleTimeout = timeout;
+  setIdleTimeout(_timeout: number): void {
+    // no-op: idle monitor is disabled; monitor stays on
   }
 
   async wakeScreen(): Promise<void> {
@@ -164,7 +151,6 @@ export class ScreenManager {
       }
 
       this.isScreenOn = true;
-      this.lastActivity = Date.now();
       this.window.webContents.send('screen:woke');
     } catch (error) {
       console.error('Failed to wake screen:', error);