diff --git a/README.md b/README.md
index 1c0654f..087153b 100644
--- a/README.md
+++ b/README.md
@@ -143,6 +143,7 @@ tests/run_all.sh --skip-integration
 测试覆盖：
 
 - `tests/test_cli.sh`：入口脚本与安装脚本帮助输出
+- `tests/test_interactive.sh`：交互主菜单的 add/list/delete/save 回归
 - `tests/test_common.sh`：输入校验
 - `tests/test_storage.sh`：规则存储
 - `tests/test_env_check.sh`：环境检查与修复
diff --git a/iptables-forward.sh b/iptables-forward.sh
index 2c93c45..42f86a2 100644
--- a/iptables-forward.sh
+++ b/iptables-forward.sh
@@ -96,7 +96,8 @@ main_menu_loop() {
   local choice
   while true; do
     render_main_menu
-    choice=$(prompt_input '请选择 [0-5]' '')
+    prompt_input_capture '请选择 [0-5]' ''
+    choice=${PROMPT_INPUT_RESULT}
     case ${choice} in
       1) cmd_list ;;
       2) cmd_add ;;
diff --git a/lib/common.sh b/lib/common.sh
index 83832c2..4eadc4a 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -150,17 +150,16 @@ print_section() {
 }
 
 read_test_input() {
-  local reply=''
+  READ_TEST_INPUT_RESULT=''
   if [[ -n ${IPF_TEST_INPUTS-} ]]; then
     if [[ ${IPF_TEST_INPUTS} == *$'\n'* ]]; then
-      reply=${IPF_TEST_INPUTS%%$'\n'*}
+      READ_TEST_INPUT_RESULT=${IPF_TEST_INPUTS%%$'\n'*}
       IPF_TEST_INPUTS=${IPF_TEST_INPUTS#*$'\n'}
     else
-      reply=${IPF_TEST_INPUTS}
+      READ_TEST_INPUT_RESULT=${IPF_TEST_INPUTS}
       IPF_TEST_INPUTS=''
     fi
   fi
-  printf '%s' "${reply}"
 }
 
 prompt_input() {
@@ -169,10 +168,12 @@ prompt_input() {
   local reply=''
 
   if [[ -n ${IPF_TEST_INPUTS-} ]]; then
-    reply=$(read_test_input)
+    read_test_input
+    reply=${READ_TEST_INPUT_RESULT}
     if [[ -z ${reply} && -n ${default_value} ]]; then
       reply=${default_value}
     fi
+    PROMPT_INPUT_RESULT=${reply}
     printf '%s\n' "${reply}" >&2
     printf '%s\n' "${reply}"
     return 0
@@ -184,9 +185,14 @@ prompt_input() {
   else
     read -r -p "${prompt}: " reply
   fi
+  PROMPT_INPUT_RESULT=${reply}
   printf '%s\n' "${reply}"
 }
 
+prompt_input_capture() {
+  prompt_input "$@" >/dev/null
+}
+
 prompt_confirm() {
   local prompt=$1
   local default_choice=${2:-n}
@@ -198,7 +204,8 @@ prompt_confirm() {
     suffix='[y/N]'
   fi
 
-  answer=$(prompt_input "${prompt} ${suffix}" "")
+  prompt_input_capture "${prompt} ${suffix}" ""
+  answer=${PROMPT_INPUT_RESULT}
   if [[ -z ${answer} ]]; then
     answer=${default_choice}
   fi
@@ -218,15 +225,21 @@ prompt_select() {
   done
 
   while true; do
-    answer=$(prompt_input "${prompt}" "")
+    prompt_input_capture "${prompt}" ""
+    answer=${PROMPT_INPUT_RESULT}
     if [[ ${answer} =~ ^[0-9]+$ ]] && (( answer >= 1 && answer <= count )); then
-      printf '%s\n' "$((answer - 1))"
+      PROMPT_SELECT_RESULT=$((answer - 1))
+      printf '%s\n' "${PROMPT_SELECT_RESULT}"
       return 0
     fi
     log_warn "请输入 1-${count} 之间的编号。"
   done
 }
 
+prompt_select_capture() {
+  prompt_select "$@" >/dev/null
+}
+
 pause_return() {
   if [[ -n ${IPF_TEST_INPUTS-} ]]; then
     return 0
@@ -272,7 +285,7 @@ _validate_ipv6_part_count() {
       continue
     fi
     [[ ${field} =~ ^[0-9A-Fa-f]{1,4}$ ]] || return 1
-    ((count++))
+    ((count += 1))
   done
 
   printf '%s\n' "${count}"
diff --git a/lib/rules_mgr.sh b/lib/rules_mgr.sh
index a8b210a..3220a4d 100644
--- a/lib/rules_mgr.sh
+++ b/lib/rules_mgr.sh
@@ -216,7 +216,8 @@ cmd_add() {
   local proto_choice ipver_choice proto ipver lport tip tport desc
 
   print_section '添加新的转发规则'
-  proto_choice=$(prompt_select '请选择协议' 'TCP' 'UDP' 'TCP + UDP')
+  prompt_select_capture '请选择协议' 'TCP' 'UDP' 'TCP + UDP'
+  proto_choice=${PROMPT_SELECT_RESULT}
   case ${proto_choice} in
     0) proto=tcp ;;
     1) proto=udp ;;
@@ -225,12 +226,14 @@ cmd_add() {
   esac
 
   while true; do
-    lport=$(prompt_input '请输入本地监听端口' '')
+    prompt_input_capture '请输入本地监听端口' ''
+    lport=${PROMPT_INPUT_RESULT}
     validate_port "${lport}" && break
     log_warn '端口无效，请重新输入。'
   done
 
-  ipver_choice=$(prompt_select '请选择 IP 版本' '仅 IPv4' '仅 IPv6' '同时 IPv4 + IPv6')
+  prompt_select_capture '请选择 IP 版本' '仅 IPv4' '仅 IPv6' '同时 IPv4 + IPv6'
+  ipver_choice=${PROMPT_SELECT_RESULT}
   case ${ipver_choice} in
     0) ipver=4 ;;
     1) ipver=6 ;;
@@ -239,18 +242,21 @@ cmd_add() {
   esac
 
   while true; do
-    tip=$(prompt_input "$(rule_target_hint "${ipver}")" '')
+    prompt_input_capture "$(rule_target_hint "${ipver}")" ''
+    tip=${PROMPT_INPUT_RESULT}
     rule_validate_target "${tip}" "${ipver}" && break
     log_warn '目标地址无效，请重新输入。'
   done
 
   while true; do
-    tport=$(prompt_input '请输入目标端口' '')
+    prompt_input_capture '请输入目标端口' ''
+    tport=${PROMPT_INPUT_RESULT}
     validate_port "${tport}" && break
     log_warn '目标端口无效，请重新输入。'
   done
 
-  desc=$(prompt_input '请输入描述（可留空）' '')
+  prompt_input_capture '请输入描述（可留空）' ''
+  desc=${PROMPT_INPUT_RESULT}
   desc=$(rule_sanitize_desc "${desc}")
 
   printf '协议: %s\n' "$(rule_proto_label "${proto}")"
@@ -319,7 +325,8 @@ cmd_delete() {
   cmd_list 0
 
   while true; do
-    answer=$(prompt_input '请输入要删除的规则编号' '')
+    prompt_input_capture '请输入要删除的规则编号' ''
+    answer=${PROMPT_INPUT_RESULT}
     if [[ ${answer} =~ ^[0-9]+$ ]] && (( answer >= 1 && answer <= ${#RULES_CACHE[@]} )); then
       index=$((answer - 1))
       break
diff --git a/lib/storage.sh b/lib/storage.sh
index 4b0fe0d..8b19534 100644
--- a/lib/storage.sh
+++ b/lib/storage.sh
@@ -127,7 +127,7 @@ storage_count() {
   local count=0 line
   while IFS= read -r line || [[ -n ${line} ]]; do
     [[ -n ${line} ]] || continue
-    ((count++))
+    ((count += 1))
   done < <(storage_list)
   printf '%s\n' "${count}"
 }
diff --git a/tests/run_all.sh b/tests/run_all.sh
index 2b57fbd..21495f6 100644
--- a/tests/run_all.sh
+++ b/tests/run_all.sh
@@ -24,6 +24,7 @@ run_test() {
 
 run_test "${ROOT_DIR}/tests/test_common.sh"
 run_test "${ROOT_DIR}/tests/test_cli.sh"
+run_test "${ROOT_DIR}/tests/test_interactive.sh"
 run_test "${ROOT_DIR}/tests/test_storage.sh"
 run_test "${ROOT_DIR}/tests/test_env_check.sh"
 run_test "${ROOT_DIR}/tests/test_rules_unit.sh"
diff --git a/tests/test_common.sh b/tests/test_common.sh
index d225100..82221f5 100644
--- a/tests/test_common.sh
+++ b/tests/test_common.sh
@@ -15,6 +15,17 @@ status_of() {
   printf '%s\n' "${rc}"
 }
 
+prompt_tmp=$(mktemp)
+trap 'rm -f "${prompt_tmp}"' EXIT
+
+export IPF_TEST_INPUTS=$'first\nsecond\n'
+prompt_input 'first prompt' '' >"${prompt_tmp}"
+assert_eq 'first' "$(cat "${prompt_tmp}")" 'prompt_input should consume the first queued test input'
+prompt_input 'second prompt' '' >"${prompt_tmp}"
+assert_eq 'second' "$(cat "${prompt_tmp}")" 'prompt_input should consume subsequent queued test inputs'
+assert_eq '' "${IPF_TEST_INPUTS}" 'prompt_input should drain queued test inputs in the current shell'
+unset IPF_TEST_INPUTS
+
 assert_status 0 "$(status_of validate_ipv4 '0.0.0.0')" 'validate_ipv4 should accept 0.0.0.0'
 assert_status 0 "$(status_of validate_ipv4 '192.168.1.1')" 'validate_ipv4 should accept private address'
 assert_status 0 "$(status_of validate_ipv4 '255.255.255.255')" 'validate_ipv4 should accept broadcast'
diff --git a/tests/test_interactive.sh b/tests/test_interactive.sh
new file mode 100644
index 0000000..8f74929
--- /dev/null
+++ b/tests/test_interactive.sh
@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)
+# shellcheck source=tests/lib/assert.sh
+source "${ROOT_DIR}/tests/lib/assert.sh"
+
+maybe_enter_namespace() {
+  if (( EUID == 0 )); then
+    return 0
+  fi
+
+  if [[ ${IPF_IN_NAMESPACE:-0} == 1 ]]; then
+    return 0
+  fi
+
+  if command -v unshare >/dev/null 2>&1 && unshare -Urn true >/dev/null 2>&1; then
+    exec unshare -Urn env IPF_IN_NAMESPACE=1 bash "$0"
+  fi
+
+  printf 'SKIP: 交互测试需要 root 或可用的 unshare。\n'
+  exit 0
+}
+
+maybe_enter_namespace
+
+TMP_DIR=$(mktemp -d)
+trap 'rm -rf "${TMP_DIR}"' EXIT
+
+export IPF_STORAGE_DIR="${TMP_DIR}/storage"
+export IPF_STORAGE_DB="${IPF_STORAGE_DIR}/rules.db"
+export IPF_LOCK_FILE="${IPF_STORAGE_DIR}/.lock"
+export IPTABLES_MOCK_DIR="${TMP_DIR}/iptables-mock"
+export IPTABLES_MOCK_LOG="${TMP_DIR}/iptables.log"
+export IPTABLES_BIN="${ROOT_DIR}/tests/mocks/iptables"
+export IP6TABLES_BIN="${ROOT_DIR}/tests/mocks/ip6tables"
+export IPTABLES_SAVE_BIN="${ROOT_DIR}/tests/mocks/iptables-save"
+export IP6TABLES_SAVE_BIN="${ROOT_DIR}/tests/mocks/ip6tables-save"
+export NETFILTER_PERSISTENT_BIN="${ROOT_DIR}/tests/mocks/persist-mock.sh"
+export PERSIST_MOCK_LOG="${TMP_DIR}/persist.log"
+export IPF_SKIP_ENV_CHECK=1
+export IPF_FORCE_PLAIN_UI=1
+export IPF_TEST_INPUTS=$'4\n2\n1\n8080\n1\n127.0.0.1\n80\ninteractive web\ny\n5\n1\n3\n1\ny\n0\n'
+
+output=$("${ROOT_DIR}/iptables-forward.sh" 2>&1)
+
+assert_contains "${output}" '== 环境状态 ==' 'interactive flow should open environment status view'
+assert_contains "${output}" '规则总数: 0' 'environment status should show empty rule count before adding'
+assert_contains "${output}" '== 添加新的转发规则 ==' 'interactive flow should enter add screen'
+assert_contains "${output}" '描述: interactive web' 'interactive add summary should echo description'
+assert_contains "${output}" '规则已保存到磁盘。' 'interactive flow should exercise menu save action'
+assert_contains "${output}" 'interactive web' 'interactive list/delete flow should display the created description'
+assert_contains "${output}" '规则已添加，UUID=' 'interactive flow should add one managed rule'
+assert_contains "${output}" '已退出。' 'interactive flow should return cleanly from main menu'
+
+assert_eq '0' "$(wc -l < "${IPF_STORAGE_DB}")" 'interactive add/delete flow should leave storage empty'
+assert_eq '0' "$(wc -l < "${IPTABLES_MOCK_DIR}/state.v4")" 'interactive add/delete flow should leave runtime mock state empty'
+assert_eq '3' "$(grep -Ec ' -A ' "${IPTABLES_MOCK_LOG}")" 'interactive add flow should emit three IPv4 add commands'
+assert_eq '3' "$(grep -Ec ' -D ' "${IPTABLES_MOCK_LOG}")" 'interactive delete should emit three delete commands'
+assert_eq '3' "$(grep -Ec 'persist-mock\.sh save' "${PERSIST_MOCK_LOG}")" 'interactive add/menu-save/delete flow should persist three times'
+
+pass 'test_interactive.sh'