integrate: FG Scan documentation into help system

- Add fg_scan.md to documentation routes mapping
- Add FG Scan link to help viewer navigation menu
- Add floating help button to fg_scan.html page
- Documentation now accessible from both:
  * Floating help button (📖) on fg_scan page
  * Help navigation menu in documentation viewer

py_app/app/routes.py

@@ -4229,6 +4229,7 @@ def help(page='dashboard'):
     # Map page names to markdown files
     doc_files = {
         'dashboard': 'dashboard.md',
+        'fg_scan': 'fg_scan.md',
         'print_module': 'print_module.md',
         'print_lost_labels': 'print_lost_labels.md',
         'daily_mirror': 'daily_mirror.md',

py_app/app/templates/docs/help_viewer.html

@@ -169,6 +169,7 @@
         <div class="help-navigation">
             <strong>Documentație disponibilă:</strong>
             <a href="{{ url_for('main.help', page='dashboard') }}">Dashboard</a>
+            <a href="{{ url_for('main.help', page='fg_scan') }}">FG Scan - Scanare Produse</a>
             <a href="{{ url_for('main.help', page='etichete') }}">Modul Etichete</a>
             <a href="{{ url_for('main.help', page='print_module') }}">Print Module</a>
             <a href="{{ url_for('main.help', page='print_lost_labels') }}">Print Lost Labels</a>

py_app/app/templates/fg_scan.html

@@ -839,6 +839,13 @@ window.onclick = function(event) {
 
 {% endblock %}
 {% block content %}
+<!-- Floating Help Button -->
+<div class="floating-help-btn">
+    <a href="{{ url_for('main.help', page='fg_scan') }}" target="_blank" title="FG Scan Help">
+        📖
+    </a>
+</div>
+
 <div class="scan-container">
     <!-- Input Form Card -->
     <div class="card scan-form-card">