Enhance mobile UI and network scanning experience

- Fix modal scroll issues on mobile devices with proper viewport constraints
- Remove status column and apply status colors directly to device names
- Reorder columns: IP before MAC for better logical flow
- Optimize table layout for mobile with reduced padding and text ellipsis
- Implement visual disabled state for existing devices in scan modal
- Add intelligent device comparison to prevent duplicate additions
- Exclude Docker bridge networks from Linux scanning fallback
- Improve scan result handling with better error messaging

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

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

app/templates/index.html

@@ -40,9 +40,8 @@
                     <tr>
                         <th>Acțiuni</th>
                         <th>Nume Calculator</th>
-                        <th>Adresa MAC</th>
                         <th>Adresa IP</th>
-                        <th>Status</th>
+                        <th>Adresa MAC</th>
                     </tr>
                 </thead>
                 <tbody id="computers-tbody">