Version 0.9.1-2: Fix npm installation and pause button behavior

Critical Fixes:
- FIXED: npm installation verification added
  * Now explicitly checks if npm is installed after nodejs
  * Falls back to installing npm separately if missing
  * Displays npm version after installation
  * Prevents "npm: command not found" error during Electron install

- FIXED: Pause button now appears only on user interaction
  * Hidden by default (display:none)
  * Shows on mousedown/touchstart/keydown events
  * Similar behavior to keyboard icon
  * Throttled to check every 5 seconds
  * Better UX - less visual clutter

- FIXED: Pause button hidden on manual sites (duration=0)
  * Main process checks site duration when visibility requested
  * Sends pause-button-visibility message to views
  * attachView() function controls visibility on tab switch
  * Prevents confusion on sites where return-to-home popup appears

Implementation:
- Added 'request-pause-button-visibility' IPC message
- Main process responds with 'pause-button-visibility' based on duration
- Pause button automatically hidden/shown when switching tabs
- User interaction triggers visibility check

install_kiosk_0.9.1.sh

@@ -3280,7 +3280,15 @@ first_time_install() {
         curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
         sudo apt install -y nodejs
     fi
+
+    # Verify npm is installed
+    if ! command -v npm &>/dev/null; then
+        echo "⚠ npm not found, attempting to install..."
+        sudo apt install -y npm
+    fi
+
     echo "Node.js: $(node -v)"
+    echo "npm: $(npm -v)"
     
     echo "[7-10/27] Core configuration..."
     configure_touch_controls
@@ -3723,6 +3731,11 @@ function attachView(i){
       programmaticNavigation=true;
       views[i].webContents.loadURL(configuredUrl);
     }
+
+    // Control pause button visibility based on site duration
+    const siteDuration=parseInt(tabs[tabIdx].duration)||0;
+    const shouldShow=siteDuration!==0; // Hide on manual sites (duration=0)
+    views[i].webContents.send('pause-button-visibility',shouldShow);
   }
 
   views[i].webContents.focus();
@@ -4220,6 +4233,27 @@ function createWindow(){
   ipcMain.on('keyboard-activity',()=>{markKeyboardActivity();});
   ipcMain.on('show-pause-dialog',()=>{showPauseDialog();});
 
+  // Handle pause button visibility request
+  ipcMain.on('request-pause-button-visibility',()=>{
+    const currentTabIdx=viewIndexToTabIndex(currentIndex);
+    let shouldShow=true;
+
+    if(currentTabIdx>=0&&tabs[currentTabIdx]){
+      const siteDuration=parseInt(tabs[currentTabIdx].duration)||0;
+      // Hide pause button on manual sites (duration=0)
+      if(siteDuration===0){
+        shouldShow=false;
+      }
+    }
+
+    // Send visibility state to all views
+    views.forEach(v=>{
+      if(v&&v.webContents){
+        v.webContents.send('pause-button-visibility',shouldShow);
+      }
+    });
+  });
+  
   ipcMain.on('keyboard-type',(event,key)=>{
     markKeyboardActivity();
     
@@ -5125,6 +5159,7 @@ window.addEventListener('DOMContentLoaded',()=>{
 
   // Pause button functionality
   let pauseButton=null;
+  let pauseButtonVisible=false;
 
   function createPauseButton(){
     if(pauseButton)return;
@@ -5136,7 +5171,7 @@ window.addEventListener('DOMContentLoaded',()=>{
     pauseButton.style.cssText=`
       position:fixed;bottom:20px;left:20px;width:60px;height:60px;
       background:rgba(230,126,34,0.95);border:3px solid rgba(255,255,255,0.9);
-      border-radius:50%;display:flex;align-items:center;justify-content:center;
+      border-radius:50%;display:none;align-items:center;justify-content:center;
       font-size:32px;cursor:pointer;z-index:999999;
       box-shadow:0 4px 12px rgba(0,0,0,0.4);user-select:none;
     `;
@@ -5150,10 +5185,47 @@ window.addEventListener('DOMContentLoaded',()=>{
     document.body.appendChild(pauseButton);
   }
 
-  // Create pause button on page load
+  function showPauseButton(){
-  setTimeout(()=>{
+    if(!pauseButton)createPauseButton();
-    createPauseButton();
+    pauseButton.style.display='flex';
-  },1000);
+    pauseButtonVisible=true;
+  }
+
+  function hidePauseButton(){
+    if(pauseButton){
+      pauseButton.style.display='none';
+      pauseButtonVisible=false;
+    }
+  }
+
+  // Listen for pause button visibility control from main process
+  ipcRenderer.on('pause-button-visibility',(event,visible)=>{
+    if(visible){
+      showPauseButton();
+    }else{
+      hidePauseButton();
+    }
+  });
+
+  // Show pause button on user interaction (but not on manual sites)
+  let lastPauseButtonCheck=0;
+  const PAUSE_BUTTON_THROTTLE=5000;
+
+  function checkAndShowPauseButton(){
+    const now=Date.now();
+    if(now-lastPauseButtonCheck>PAUSE_BUTTON_THROTTLE){
+      lastPauseButtonCheck=now;
+      ipcRenderer.send('request-pause-button-visibility');
+    }
+  }
+
+  // Show pause button on any user interaction
+  const pauseButtonTriggers=['mousedown','touchstart','keydown'];
+  pauseButtonTriggers.forEach(eventType=>{
+    document.addEventListener(eventType,()=>{
+      checkAndShowPauseButton();
+    },{passive:true,capture:true});
+  });
 
   function isTextInput(el){
     if(!el)return false;