Fix PDF support and template URL issues

- Add PDF_SUPPORT checks before using PyMuPDF functions
- Handle missing PyMuPDF gracefully in PDF processing functions
- Fix url_for('jobs') to url_for('jobs_page') in templates
- Prevent AttributeError when fitz is None

templates/jobs.html

@@ -173,7 +173,7 @@
     <div class="nav-links">
         <a href="{{ url_for('index') }}" class="nav-link">📤 Upload Files</a>
         <a href="{{ url_for('results') }}" class="nav-link">📋 View Results</a>
-        <a href="{{ url_for('jobs') }}" class="nav-link">📊 View All Jobs</a>
+        <a href="{{ url_for('jobs_page') }}" class="nav-link">📊 View All Jobs</a>
     </div>
 
     <a href="{{ url_for('index') }}" class="back-link">← Back to Upload</a>