Fix print preview to show content and improve file loading timing

Print Preview Fixes:
- Fixed print preview to show actual preview content instead of formatting menu
- Changed from generic 'preview' ID to active tab's 'preview-{tabId}' element
- Added CSS positioning to make preview fixed and full-screen during print
- Hide all dialog overlays (export, batch, PDF, converter) during print
- Restore dialogs after print completes
- Enhanced print-mode CSS with z-index and positioning for proper display
File Loading Timing Improvements:
- Increased renderer-ready delay from 500ms to 1000ms for slower first loads
- Increased openFileFromPath delay from 100ms to 300ms
- Ensures UI fully initializes before files are displayed
- Files now render correctly on first double-click launch
🤖 Generated with [Claude Code](https://claude.com/claude-code)

src/main.js

@@ -1668,11 +1668,11 @@ function openFileFromPath(filePath) {
     currentFile = filePath;
     const content = fs.readFileSync(filePath, 'utf-8');
     if (mainWindow && mainWindow.webContents && rendererReady) {
-      // Add a small delay to ensure renderer is fully prepared to display the file
-      // This prevents timing issues where file opens before UI is ready
+      // Add delay to ensure renderer is fully prepared to display the file
+      // Increased delay for first-time load when UI is still initializing
       setTimeout(() => {
         mainWindow.webContents.send('file-opened', { path: filePath, content });
-      }, 100);
+      }, 300);
     } else {
       // Store file to open after renderer is ready
       app.pendingFile = filePath;

src/renderer.js

@@ -1044,9 +1044,10 @@ document.addEventListener('DOMContentLoaded', () => {
 
     // Delay renderer-ready signal to ensure all UI initialization completes
     // This prevents files from opening before the interface is fully loaded
+    // Increased delay to account for slower first-time initialization
     setTimeout(() => {
         ipcRenderer.send('renderer-ready');
-    }, 500);
+    }, 1000);
 
     // Set up auto-save interval
     setInterval(() => {
@@ -1163,7 +1164,9 @@ ipcRenderer.on('print-preview-styled', () => {
 
 // Print preview handler - prepare for printing
 ipcRenderer.on('prepare-print-preview', (event, withStyles) => {
-    const previewContent = document.getElementById('preview');
+    // Get the active tab's preview element
+    const activeTabId = tabManager ? tabManager.activeTabId : 1;
+    const previewContent = document.getElementById(`preview-${activeTabId}`);
 
     if (!previewContent || !previewContent.innerHTML.trim()) {
         alert('Nothing to print. Please create or open a document and ensure the preview is visible.');
@@ -1176,8 +1179,18 @@ ipcRenderer.on('prepare-print-preview', (event, withStyles) => {
     document.getElementById('tab-bar').style.display = 'none';
     document.getElementById('status-bar').style.display = 'none';
 
+    // Hide all export dialogs and other overlays
+    const exportDialog = document.getElementById('export-dialog');
+    const batchDialog = document.getElementById('batch-dialog');
+    const pdfDialog = document.getElementById('pdf-editor-dialog');
+    const converterDialog = document.getElementById('converter-dialog');
+    if (exportDialog) exportDialog.style.display = 'none';
+    if (batchDialog) batchDialog.style.display = 'none';
+    if (pdfDialog) pdfDialog.style.display = 'none';
+    if (converterDialog) converterDialog.style.display = 'none';
+
     // Show preview in full width
-    const preview = document.getElementById('preview');
+    const preview = document.getElementById(`preview-${activeTabId}`);
     if (preview) {
         preview.classList.add('print-mode');
         if (!withStyles) {
@@ -1192,7 +1205,13 @@ ipcRenderer.on('prepare-print-preview', (event, withStyles) => {
         document.getElementById('tab-bar').style.display = '';
         document.getElementById('status-bar').style.display = '';
 
-        const preview = document.getElementById('preview');
+        // Restore dialog visibility if they were open
+        if (exportDialog) exportDialog.style.display = '';
+        if (batchDialog) batchDialog.style.display = '';
+        if (pdfDialog) pdfDialog.style.display = '';
+        if (converterDialog) converterDialog.style.display = '';
+
+        const preview = document.getElementById(`preview-${activeTabId}`);
         if (preview) {
             preview.classList.remove('print-mode', 'print-no-styles');
         }

src/styles.css

@@ -2956,6 +2956,17 @@ body.theme-concrete-warm .status-bar {
     display: block !important;
     width: 100% !important;
     max-width: 100% !important;
+    position: fixed !important;
+    top: 0 !important;
+    left: 0 !important;
+    z-index: 9999 !important;
+    background: white !important;
+    padding: 20px !important;
+}
+
+/* Ensure preview panes are visible in print mode */
+#preview-pane-1, #preview-pane-2, #preview-pane-3, #preview-pane-4, #preview-pane-5 {
+    display: block !important;
 }
 
 .print-no-styles .preview-content {