feat: ssl_fallback智能排除已失败的方案

问题描述:
- 用户选择方案2失败后，fallback还推荐方案2
- 用户再次选择方案2，还是会失败
- 浪费时间，用户体验差

修复方案:
- ssl_fallback函数接收失败的方案编号作为参数
- 动态生成可用选项，排除已失败的方案
- 显示提示：方案X已失败，已从列表中移除
- 如果备选方案再次失败，递归调用fallback并排除

改进内容:
1. ssl_fallback($failed_method) - 接收方案编号
2. 动态显示可用选项（排除失败方案）
3. 输入验证：只接受可用选项
4. 递归调用：如果备选方案也失败，继续排除

方案编号映射:
- 1: Certbot
- 2: acme.sh + Let's Encrypt
- 3: acme.sh + ZeroSSL
- 4: acme.sh + Buypass
- 5: 阿里云（未实现）
- 6: 腾讯云（未实现）
- 8: 不配置HTTPS

用户体验改进:
- 避免重复尝试失败的方案
- 清晰提示哪个方案已失败
- 自动缩小选择范围
- 节省用户时间

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

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

install.sh

@@ -1134,22 +1134,22 @@ deploy_ssl() {
 
     case $SSL_METHOD in
         1)
-            deploy_certbot || ssl_fallback
+            deploy_certbot || ssl_fallback "1"
             ;;
         2)
-            deploy_acme_letsencrypt || ssl_fallback
+            deploy_acme_letsencrypt || ssl_fallback "2"
             ;;
         3)
-            deploy_acme_zerossl || ssl_fallback
+            deploy_acme_zerossl || ssl_fallback "3"
             ;;
         4)
-            deploy_acme_buypass || ssl_fallback
+            deploy_acme_buypass || ssl_fallback "4"
             ;;
         5)
-            deploy_aliyun_ssl || ssl_fallback
+            deploy_aliyun_ssl || ssl_fallback "5"
             ;;
         6)
-            deploy_tencent_ssl || ssl_fallback
+            deploy_tencent_ssl || ssl_fallback "6"
             ;;
         7)
             deploy_manual_ssl
@@ -1162,35 +1162,97 @@ deploy_ssl() {
 }
 
 ssl_fallback() {
+    local failed_method=$1  # 接收失败的方案编号
+
     print_error "SSL证书部署失败"
     echo ""
     print_warning "建议尝试备选方案:"
-    echo -e "${GREEN}[2]${NC} acme.sh + Let's Encrypt (推荐)"
+    echo ""
+
+    # 动态显示可用选项（排除已失败的）
+    local available_options=()
+
+    # 方案1: Certbot
+    if [[ "$failed_method" != "1" ]]; then
+        echo -e "${GREEN}[1]${NC} Certbot (Let's Encrypt官方工具)"
+        available_options+=("1")
+    fi
+
+    # 方案2: acme.sh + Let's Encrypt
+    if [[ "$failed_method" != "2" ]]; then
+        echo -e "${GREEN}[2]${NC} acme.sh + Let's Encrypt"
+        available_options+=("2")
+    fi
+
+    # 方案3: acme.sh + ZeroSSL
+    if [[ "$failed_method" != "3" ]]; then
         echo -e "${GREEN}[3]${NC} acme.sh + ZeroSSL"
+        available_options+=("3")
+    fi
+
+    # 方案4: acme.sh + Buypass
+    if [[ "$failed_method" != "4" ]]; then
         echo -e "${GREEN}[4]${NC} acme.sh + Buypass"
+        available_options+=("4")
+    fi
+
+    # 方案5: 阿里云（注释掉，未实现）
+    # if [[ "$failed_method" != "5" ]]; then
+    #     echo -e "${GREEN}[5]${NC} 阿里云免费证书"
+    #     available_options+=("5")
+    # fi
+
+    # 方案6: 腾讯云（注释掉，未实现）
+    # if [[ "$failed_method" != "6" ]]; then
+    #     echo -e "${GREEN}[6]${NC} 腾讯云免费证书"
+    #     available_options+=("6")
+    # fi
+
+    # 方案8: 不配置HTTPS
     echo -e "${GREEN}[8]${NC} 暂不配置HTTPS"
+    available_options+=("8")
+
+    echo ""
+    echo -e "${YELLOW}提示: 方案 $failed_method 已失败，已从列表中移除${NC}"
     echo ""
 
     while true; do
-        read -p "请选择备选方案 [2-4/8]: " retry_choice < /dev/tty
+        read -p "请选择备选方案: " retry_choice < /dev/tty
+
+        # 检查输入是否在可用选项中
+        if [[ ! " ${available_options[@]} " =~ " ${retry_choice} " ]]; then
+            print_error "无效选项或该方案已失败"
+            continue
+        fi
+
         case $retry_choice in
+            1)
+                deploy_certbot && return 0
+                # 如果再次失败，继续调用fallback但排除方案1
+                ssl_fallback "1"
+                return $?
+                ;;
             2)
                 deploy_acme_letsencrypt && return 0
+                # 如果再次失败，继续调用fallback但排除方案2
+                ssl_fallback "2"
+                return $?
                 ;;
             3)
                 deploy_acme_zerossl && return 0
+                ssl_fallback "3"
+                return $?
                 ;;
             4)
                 deploy_acme_buypass && return 0
+                ssl_fallback "4"
+                return $?
                 ;;
             8)
                 print_info "跳过HTTPS配置"
                 SSL_METHOD=8
                 return 0
                 ;;
-            *)
-                print_error "无效选项"
-                ;;
         esac
     done
 }