Add multi-host Proxmox support with SSL certificate handling

- Added support for multiple Proxmox hosts (pve7.0bin.in:443, Healthport PVE:8006)
- Enhanced VM management APIs to accept host parameter
- Fixed WebSocket URL generation bug (dynamic port handling)
- Added comprehensive SSL certificate trust help system
- Implemented host selection dropdown in UI
- Added VNC connection failure detection and automatic SSL help redirection
- Updated session management to store host_key information
- Enhanced error handling for different Proxmox configurations

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

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

farmq-admin/templates/vm_list.html

@@ -77,12 +77,34 @@
             <div class="col-12">
                 <div class="d-flex justify-content-between align-items-center mb-4">
                     <h2><i class="fas fa-desktop"></i> Proxmox VM 관리</h2>
-                    <div>
+                    <div class="d-flex align-items-center gap-3">
+                        <!-- 호스트 선택 드롭다운 -->
+                        <div class="dropdown">
+                            <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="hostSelector" data-bs-toggle="dropdown" aria-expanded="false">
+                                <i class="fas fa-server"></i> {{ current_host_name or '호스트 선택' }}
+                            </button>
+                            <ul class="dropdown-menu" aria-labelledby="hostSelector">
+                                {% for host_key, host_info in available_hosts.items() %}
+                                <li>
+                                    <a class="dropdown-item {% if host_key == current_host_key %}active{% endif %}" 
+                                       href="/vms?host={{ host_key }}"
+                                       onclick="changeHost('{{ host_key }}')">
+                                        <i class="fas fa-server me-2"></i>
+                                        <strong>{{ host_info.name }}</strong><br>
+                                        <small class="text-muted">{{ host_info.host }}{% if host_info.port != 443 %}:{{ host_info.port }}{% endif %}</small>
+                                    </a>
+                                </li>
+                                {% endfor %}
+                            </ul>
+                        </div>
+                        
                         <button id="refresh-btn" class="btn btn-outline-primary">
                             <i class="fas fa-sync-alt"></i> 새로고침
                         </button>
-                        <span class="text-muted ms-3">
-                            <i class="fas fa-server"></i> {{ host }}
+                        
+                        <span class="text-muted">
+                            <i class="fas fa-network-wired"></i> 
+                            <small>{{ current_host_info.host }}{% if current_host_info.port != 443 %}:{{ current_host_info.port }}{% endif %}</small>
                         </span>
                     </div>
                 </div>
@@ -271,7 +293,8 @@
                     body: JSON.stringify({
                         node: node,
                         vmid: vmid,
-                        vm_name: vmName
+                        vm_name: vmName,
+                        host: new URLSearchParams(window.location.search).get('host') || 'pve7.0bin.in'
                     })
                 });
                 
@@ -312,7 +335,8 @@
                     },
                     body: JSON.stringify({
                         node: node,
-                        vmid: vmid
+                        vmid: vmid,
+                        host: new URLSearchParams(window.location.search).get('host') || 'pve7.0bin.in'
                     })
                 });
                 
@@ -345,7 +369,8 @@
                     },
                     body: JSON.stringify({
                         node: node,
-                        vmid: vmid
+                        vmid: vmid,
+                        host: new URLSearchParams(window.location.search).get('host') || 'pve7.0bin.in'
                     })
                 });
                 
@@ -375,6 +400,13 @@
             location.reload();
         };
         
+        // 호스트 변경
+        function changeHost(hostKey) {
+            showSpinner();
+            showToast('호스트 변경', `${hostKey} 호스트로 연결 중...`, 'info');
+            // URL을 통해 페이지 이동 (이미 href에 설정되어 있음)
+        };
+        
         // 스피너 표시/숨김
         function showSpinner() {
             document.querySelector('.loading-spinner').style.display = 'block';