Fix v1.9.0 header/footer visibility issues

This commit fixes two critical issues in the v1.9.0 header/footer feature:

1. **Logo Upload Error Fix**:
   - Fixed "path undefined" error when uploading logos
   - Added validation in main.js to check filePath before processing
   - Added fallback in renderer.js to use webUtils.getPathForFile if file.path is undefined
   - Added file existence check before copying

2. **Header/Footer Visibility Fix**:
   - Added header/footer support to tryPdfFallback function (PDF fallback engines)
   - Previously, only performExportWithOptions had header/footer logic
   - Now all PDF export paths include headers/footers when enabled
   - Fallback engines now generate fancyhdr LaTeX code for headers/footers

Technical details:
- src/main.js:667-709: Enhanced logo upload handler with error checking
- src/main.js:1289-1319: Added header/footer to tryPdfFallback function
- src/renderer.js:2661-2678: Fixed logo file path handling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/main.js

@@ -666,6 +666,11 @@ ipcMain.on('save-header-footer-settings', (event, settings) => {
 // Save header/footer logo image
 ipcMain.on('save-header-footer-logo', async (event, { position, filePath }) => {
   try {
+    if (!filePath) {
+      dialog.showErrorBox('Logo Error', 'Failed to save logo: The "path" argument must be of type string. Received undefined');
+      return;
+    }
+
     // Copy image to userData directory for persistent storage
     const userDataPath = app.getPath('userData');
     const logoDir = path.join(userDataPath, 'logos');
@@ -675,6 +680,12 @@ ipcMain.on('save-header-footer-logo', async (event, { position, filePath }) => {
       fs.mkdirSync(logoDir, { recursive: true });
     }
 
+    // Verify source file exists
+    if (!fs.existsSync(filePath)) {
+      dialog.showErrorBox('Logo Error', `Source file not found: ${filePath}`);
+      return;
+    }
+
     // Generate unique filename
     const ext = path.extname(filePath);
     const filename = `${position}_${Date.now()}${ext}`;
@@ -692,6 +703,7 @@ ipcMain.on('save-header-footer-logo', async (event, { position, filePath }) => {
 
     event.reply('header-footer-logo-saved', { position, path: destPath });
   } catch (error) {
+    console.error('Logo save error:', error);
     dialog.showErrorBox('Logo Error', `Failed to save logo: ${error.message}`);
   }
 });
@@ -1196,6 +1208,38 @@ function performExportWithOptions(format, options) {
       pandocCmd += ` --pdf-engine="${pdfEngine}"`;
       if (options.geometry) pandocCmd += ` -V geometry:"${options.geometry}"`;
 
+      // Add header/footer if enabled
+      if (headerFooterSettings.enabled) {
+        const filename = currentFile ? path.basename(currentFile, path.extname(currentFile)) : 'document';
+        const metadata = { filename, title: filename, author: '' };
+
+        const headerLeft = processDynamicFields(headerFooterSettings.header.left, metadata);
+        const headerCenter = processDynamicFields(headerFooterSettings.header.center, metadata);
+        const headerRight = processDynamicFields(headerFooterSettings.header.right, metadata);
+        const footerLeft = processDynamicFields(headerFooterSettings.footer.left, metadata);
+        const footerCenter = processDynamicFields(headerFooterSettings.footer.center, metadata);
+        const footerRight = processDynamicFields(headerFooterSettings.footer.right, metadata);
+
+        // Create LaTeX header
+        const latexHeader = `
+\\usepackage{fancyhdr}
+\\pagestyle{fancy}
+\\fancyhf{}
+\\lhead{${headerLeft.replace(/\\/g, '\\\\')}}
+\\chead{${headerCenter.replace(/\\/g, '\\\\')}}
+\\rhead{${headerRight.replace(/\\/g, '\\\\')}}
+\\lfoot{${footerLeft.replace(/\\/g, '\\\\')}}
+\\cfoot{${footerCenter.replace(/[$]PAGE[$]/g, '\\\\thepage').replace(/[$]TOTAL[$]/g, '\\\\pageref{LastPage}').replace(/\\/g, '\\\\')}}
+\\rfoot{${footerRight.replace(/\\/g, '\\\\')}}
+\\renewcommand{\\headrulewidth}{0.4pt}
+\\renewcommand{\\footrulewidth}{0.4pt}
+`;
+        const headerFile = path.join(require('os').tmpdir(), `header_export_${Date.now()}.tex`);
+        fs.writeFileSync(headerFile, latexHeader, 'utf-8');
+        pandocCmd += ` --include-in-header="${headerFile}"`;
+        pandocCmd += ' --variable header-includes="\\\\usepackage{lastpage}"';
+      }
+
       // Try with specified PDF engine
       exec(pandocCmd, (error) => {
         if (error) {
@@ -1209,6 +1253,15 @@ function performExportWithOptions(format, options) {
     } else if (format === 'docx') {
       pandocCmd += ' -t docx';
       exportWithPandoc(pandocCmd, outputFile, format);
+    } else if (format === 'pptx') {
+      // Add PowerPoint footer if enabled
+      if (headerFooterSettings.enabled && headerFooterSettings.footer.center) {
+        const filename = currentFile ? path.basename(currentFile, path.extname(currentFile)) : 'document';
+        const metadata = { filename, title: filename, author: '' };
+        const footerText = processDynamicFields(headerFooterSettings.footer.center, metadata);
+        pandocCmd += ` --variable footer="${footerText}"`;
+      }
+      exportWithPandoc(pandocCmd, outputFile, format);
     } else {
       // Generic export for other formats
       exportWithPandoc(pandocCmd, outputFile, format);
@@ -1233,6 +1286,38 @@ function tryPdfFallback(inputFile, outputFile, engines, index, options, lastErro
   // Add geometry if specified
   if (options.geometry) pandocCmd = pandocCmd.replace(` -o `, ` -V geometry:"${options.geometry}" -o `);
 
+  // Add header/footer if enabled
+  if (headerFooterSettings.enabled) {
+    const filename = path.basename(inputFile, path.extname(inputFile));
+    const metadata = { filename, title: filename, author: options.metadata?.author || '' };
+
+    const headerLeft = processDynamicFields(headerFooterSettings.header.left, metadata);
+    const headerCenter = processDynamicFields(headerFooterSettings.header.center, metadata);
+    const headerRight = processDynamicFields(headerFooterSettings.header.right, metadata);
+    const footerLeft = processDynamicFields(headerFooterSettings.footer.left, metadata);
+    const footerCenter = processDynamicFields(headerFooterSettings.footer.center, metadata);
+    const footerRight = processDynamicFields(headerFooterSettings.footer.right, metadata);
+
+    // Create LaTeX header for fancyhdr
+    const latexHeader = `
+\\usepackage{fancyhdr}
+\\usepackage{lastpage}
+\\pagestyle{fancy}
+\\fancyhf{}
+\\lhead{${headerLeft.replace(/\\/g, '\\\\')}}
+\\chead{${headerCenter.replace(/\\/g, '\\\\')}}
+\\rhead{${headerRight.replace(/\\/g, '\\\\')}}
+\\lfoot{${footerLeft.replace(/\\/g, '\\\\')}}
+\\cfoot{${footerCenter.replace(/\$PAGE\$/g, '\\\\thepage').replace(/\$TOTAL\$/g, '\\\\pageref{LastPage}').replace(/\\/g, '\\\\')}}
+\\rfoot{${footerRight.replace(/\\/g, '\\\\')}}
+\\renewcommand{\\headrulewidth}{0.4pt}
+\\renewcommand{\\footrulewidth}{0.4pt}
+`;
+    const headerFile = path.join(require('os').tmpdir(), `header_fallback_${Date.now()}.tex`);
+    fs.writeFileSync(headerFile, latexHeader, 'utf-8');
+    pandocCmd += ` --include-in-header="${headerFile}"`;
+  }
+
   // Add all other options
   if (options.template && options.template !== 'default') {
     pandocCmd += ` --template="${options.template}"`;

src/renderer.js

@@ -2663,7 +2663,14 @@ function handleLogoSelection(position) {
     const input = document.getElementById(`${position}-logo`);
 
     if (input.files && input.files[0]) {
-        const filePath = input.files[0].path;
+        const file = input.files[0];
+        // Use webUtils to get the real file path in Electron
+        const filePath = file.path || (window.electron && window.electron.webUtils ? window.electron.webUtils.getPathForFile(file) : null);
+
+        if (!filePath) {
+            alert('Error: Could not get file path. Please try again.');
+            return;
+        }
 
         // Send to main process to save
         ipcRenderer.send('save-header-footer-logo', { position, filePath });