Add dashboard IPs/restart/connections, SMB read-only and recycle bin

Dashboard:
- Server IPs card showing all non-loopback IPv4 interfaces
- Restart buttons next to smbd/nfsd status dots (POST /api/service/<name>/restart)
- Active SMB connections table (smbstatus -b parsed in backend)

SMB edit modal:
- Read only toggle (writable vs read only in smb.conf)
- Recycle Bin toggle (vfs objects = recycle, files go to .recycle folder)

Docs: PLANNING.md phase 3.5, README recycle bin + read-only, CLAUDE.md JS overview

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/index.html

@@ -131,6 +131,14 @@
                         </div>
                     </div>
                 </div>
+                <div class="col-12">
+                    <div class="card">
+                        <div class="card-body py-2 px-3">
+                            <span class="card-label me-3">Server IPs</span>
+                            <span id="serverIps" style="font-size:.87em">…</span>
+                        </div>
+                    </div>
+                </div>
             </div>
 
             <div class="d-flex justify-content-between align-items-center mb-2">
@@ -146,6 +154,16 @@
                 </table>
             </div>
 
+            <div class="fw-semibold mb-2">Active SMB Connections</div>
+            <div class="table-responsive">
+                <table class="table table-striped mb-0">
+                    <thead><tr><th>User</th><th>From</th></tr></thead>
+                    <tbody id="activeConnectionsBody">
+                        <tr><td colspan="2" style="color:var(--muted)">Loading…</td></tr>
+                    </tbody>
+                </table>
+            </div>
+
         </div>
 
         <!-- SMB -->