feat(proxy-client): добавлен самостоятельный установщик

- Зачем:
  - пакет должен устанавливаться отдельно от dotfiles без ручной раскладки и опасных замен.
- Что:
  - добавлен безопасный установщик со Stow и прямыми симлинками.
  - добавлены идемпотентная настройка Bash и защита машинных файлов.
  - обновлены инструкция и полный набор интеграционных проверок.
- Проверка:
  - env XDG_STATE_HOME=<временный каталог> bash tests/test_proxy_client_full.sh.

proxy-client/.stow-local-ignore

@@ -1 +1,4 @@
 ^/README\.md$
+^/install\.sh$
+^/\.config/proxy-client/config$
+^/\.config/proxy-client/default\.url$

proxy-client/README.md

@@ -32,20 +32,31 @@ source ~/.bash_custom
 
 ### Только пакет `proxy-client`
 
-```bash
-cd ~/dotfiles
-mkdir -p ~/.local/bin ~/.config/proxy-client
-stow proxy-client
-source ~/.config/proxy-client/shell.bash
-```
-
-Если Bash-пакет dotfiles не установлен, добавьте подключение модуля в
-`~/.bashrc`:
+Каталог можно скопировать отдельно от остальных dotfiles и запустить его
+собственный установщик из любого рабочего каталога:
 
 ```bash
-printf '%s\n' 'source ~/.config/proxy-client/shell.bash' >> ~/.bashrc
+~/src/proxy-client/install.sh
 ```
 
+При наличии Stow установщик использует его, иначе создаёт те же три симлинка
+напрямую: CLI, Bash-модуль и каталог шаблонов. Исходный каталог после установки
+нельзя перемещать: домашние ссылки зависят от его постоянного пути.
+
+По умолчанию установщик добавляет в `~/.bashrc` помеченный блок для
+`~/.local/bin` и Bash-модуля. Чтобы оставить настройки оболочки без изменений:
+
+```bash
+~/src/proxy-client/install.sh --no-shell-setup
+```
+
+Установщик не создаёт машинный `config` и закрытый `default.url`, не
+устанавливает Xray и не проверяет сеть. После установки примените изменения
+через `source ~/.bashrc`; с `--no-shell-setup` подключите модуль напрямую:
+`source ~/.config/proxy-client/shell.bash`. Затем выберите режим по разделу
+[«Настройка режима»](#настройка-режима). Без машинного конфига продолжает
+действовать режим Hiddify по умолчанию.
+
 ## Как выбирается прокси
 
 Режим определяется только машинным файлом
@@ -247,9 +258,9 @@ export PROXY_PREFLIGHT_TIMEOUT=5
 
 ## Справочник
 
-### Ручное подключение без Stow
+### Ручное подключение без установщика
 
-Можно создать ссылки на CLI, Bash-модуль и примеры либо скопировать те же файлы:
+Если пакетный установщик запустить нельзя, создайте те же ссылки вручную:
 
 ```bash
 mkdir -p ~/.local/bin ~/.config/proxy-client

proxy-client/install.sh

@@ -0,0 +1,216 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PACKAGE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
+STOW_BIN="${STOW_BIN:-stow}"
+SETUP_SHELL=1
+
+usage() {
+  cat <<'EOF'
+Использование: ./install.sh [--no-shell-setup]
+
+  --no-shell-setup  не изменять ~/.bashrc
+EOF
+}
+
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    --no-shell-setup)
+      SETUP_SHELL=0
+      ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      echo "Ошибка: неизвестный параметр: $1" >&2
+      usage >&2
+      exit 2
+      ;;
+  esac
+  shift
+done
+
+SOURCES=(
+  "$PACKAGE_DIR/.local/bin/proxy-client"
+  "$PACKAGE_DIR/.config/proxy-client/shell.bash"
+  "$PACKAGE_DIR/.config/proxy-client/examples"
+)
+TARGETS=(
+  "$HOME/.local/bin/proxy-client"
+  "$HOME/.config/proxy-client/shell.bash"
+  "$HOME/.config/proxy-client/examples"
+)
+STOW_IGNORE_PATTERNS=(
+  '^\.local/bin/proxy-client$'
+  '^\.config/proxy-client/shell\.bash$'
+  '^\.config/proxy-client/examples$'
+)
+
+source_errors=()
+[ -x "${SOURCES[0]}" ] || source_errors+=("${SOURCES[0]}")
+[ -f "${SOURCES[1]}" ] || source_errors+=("${SOURCES[1]}")
+[ -d "${SOURCES[2]}" ] || source_errors+=("${SOURCES[2]}")
+if [ "${#source_errors[@]}" -gt 0 ]; then
+  echo "Ошибка: отсутствуют обязательные файлы исходного пакета:" >&2
+  printf '  %s\n' "${source_errors[@]}" >&2
+  exit 1
+fi
+
+"${SOURCES[0]}" --help >/dev/null
+bash -n "${SOURCES[1]}"
+
+SHELL_BLOCK_START='# >>> proxy-client >>>'
+SHELL_BLOCK_END='# <<< proxy-client <<<'
+SHELL_SETUP_NEEDED=0
+BASH_CUSTOM_HAS_MODULE=0
+SHELL_PATH_NEEDED=1
+SHELL_SOURCE_NEEDED=1
+SHELL_BLOCK_CONFLICT=0
+if [ "$SETUP_SHELL" -eq 1 ]; then
+  if [ -f "$HOME/.bash_custom" ] \
+    && grep -Fq 'proxy-client/shell.bash' "$HOME/.bash_custom"; then
+    BASH_CUSTOM_HAS_MODULE=1
+    SHELL_SOURCE_NEEDED=0
+  fi
+
+  bashrc_start_count=0
+  bashrc_end_count=0
+  if [ -f "$HOME/.bashrc" ]; then
+    bashrc_start_count="$(
+      grep -Fxc "$SHELL_BLOCK_START" "$HOME/.bashrc" || true
+    )"
+    bashrc_end_count="$(
+      grep -Fxc "$SHELL_BLOCK_END" "$HOME/.bashrc" || true
+    )"
+    if grep -Fq 'export PATH="$HOME/.local/bin:$PATH"' "$HOME/.bashrc"; then
+      SHELL_PATH_NEEDED=0
+    fi
+  fi
+
+  if [ "$bashrc_start_count" -eq 0 ] && [ "$bashrc_end_count" -eq 0 ]; then
+    if [ "$SHELL_PATH_NEEDED" -eq 1 ] \
+      || [ "$SHELL_SOURCE_NEEDED" -eq 1 ]; then
+      SHELL_SETUP_NEEDED=1
+    fi
+  elif [ "$bashrc_start_count" -eq 1 ] \
+    && [ "$bashrc_end_count" -eq 1 ] \
+    && [ "$SHELL_PATH_NEEDED" -eq 0 ] \
+    && { [ "$BASH_CUSTOM_HAS_MODULE" -eq 1 ] \
+      || grep -Fq 'proxy-client/shell.bash' "$HOME/.bashrc"; }; then
+    :
+  else
+    SHELL_BLOCK_CONFLICT=1
+  fi
+fi
+
+conflicts=()
+missing_targets=0
+stow_ignore_args=()
+PARENT_DIRS=(
+  "$HOME/.local"
+  "$HOME/.local/bin"
+  "$HOME/.config"
+  "$HOME/.config/proxy-client"
+)
+for parent_dir in "${PARENT_DIRS[@]}"; do
+  if { [ -e "$parent_dir" ] || [ -L "$parent_dir" ]; } \
+    && { [ ! -d "$parent_dir" ] || [ -L "$parent_dir" ]; }; then
+    conflicts+=("$parent_dir")
+  fi
+done
+
+for index in "${!TARGETS[@]}"; do
+  target="${TARGETS[$index]}"
+  source_path="${SOURCES[$index]}"
+  if [ -e "$target" ] || [ -L "$target" ]; then
+    if [ ! -L "$target" ] \
+      || [ "$(readlink -f "$target" 2>/dev/null || true)" != "$source_path" ]; then
+      conflicts+=("$target")
+    else
+      stow_ignore_args+=("--ignore=${STOW_IGNORE_PATTERNS[$index]}")
+    fi
+  else
+    missing_targets=$((missing_targets + 1))
+  fi
+done
+
+if [ "$SHELL_SETUP_NEEDED" -eq 1 ] \
+  && { [ -e "$HOME/.bashrc" ] || [ -L "$HOME/.bashrc" ]; } \
+  && [ ! -f "$HOME/.bashrc" ]; then
+  conflicts+=("$HOME/.bashrc")
+fi
+if [ "$SHELL_BLOCK_CONFLICT" -eq 1 ]; then
+  conflicts+=("$HOME/.bashrc")
+fi
+
+if [ "${#conflicts[@]}" -gt 0 ]; then
+  echo "Ошибка: найдены конфликтующие пути:" >&2
+  printf '  %s\n' "${conflicts[@]}" >&2
+  echo "Разберите их вручную и повторите установку." >&2
+  exit 1
+fi
+
+mkdir -p "$HOME/.local/bin" "$HOME/.config/proxy-client"
+
+if command -v "$STOW_BIN" >/dev/null 2>&1; then
+  echo "Установка с помощью Stow."
+  if [ "$missing_targets" -gt 0 ]; then
+    "$STOW_BIN" --dir="$(dirname "$PACKAGE_DIR")" --target="$HOME" \
+      "${stow_ignore_args[@]}" \
+      "$(basename "$PACKAGE_DIR")"
+  fi
+else
+  echo "Установка без Stow: создаю символические ссылки напрямую."
+  for index in "${!TARGETS[@]}"; do
+    target="${TARGETS[$index]}"
+    source_path="${SOURCES[$index]}"
+    if [ ! -L "$target" ]; then
+      ln -s "$source_path" "$target"
+    fi
+  done
+fi
+
+"$HOME/.local/bin/proxy-client" --help >/dev/null
+bash -n "$HOME/.config/proxy-client/shell.bash"
+
+if [ "$SHELL_SETUP_NEEDED" -eq 1 ]; then
+  cat >> "$HOME/.bashrc" <<'EOF'
+
+# >>> proxy-client >>>
+EOF
+  if [ "$SHELL_PATH_NEEDED" -eq 1 ]; then
+    cat >> "$HOME/.bashrc" <<'EOF'
+case ":$PATH:" in
+  *":$HOME/.local/bin:"*) ;;
+  *)
+    export PATH="$HOME/.local/bin:$PATH"
+    ;;
+esac
+EOF
+  fi
+  if [ "$SHELL_SOURCE_NEEDED" -eq 1 ]; then
+    cat >> "$HOME/.bashrc" <<'EOF'
+[ -f "$HOME/.config/proxy-client/shell.bash" ] && source "$HOME/.config/proxy-client/shell.bash"
+EOF
+  fi
+  cat >> "$HOME/.bashrc" <<'EOF'
+# <<< proxy-client <<<
+EOF
+elif [ "$SETUP_SHELL" -eq 0 ]; then
+  echo "Настройка Bash пропущена (--no-shell-setup)."
+fi
+
+if [ "$SETUP_SHELL" -eq 1 ]; then
+  RELOAD_COMMAND='source ~/.bashrc'
+else
+  RELOAD_COMMAND='source ~/.config/proxy-client/shell.bash'
+fi
+
+cat <<EOF
+proxy-client установлен.
+Исходный каталог должен оставаться по постоянному пути:
+  $PACKAGE_DIR
+Примените настройки в текущей сессии: $RELOAD_COMMAND
+Настройка режима описана в $PACKAGE_DIR/README.md.
+EOF

tests/test_proxy_client_full.sh

@@ -13,5 +13,6 @@ export PYTHONDONTWRITEBYTECODE=1
 
 python3 -m unittest discover -s tests
 bash tests/test_proxy_launchers.sh
+bash tests/test_proxy_client_install.sh
 bash tests/test_install.sh
 uv run --python 3.8 --no-project python -m unittest discover -s tests

tests/test_proxy_client_install.sh

@@ -0,0 +1,402 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TEST_TMP_ROOT="$(mktemp -d /tmp/proxy-client-install-test.XXXXXX)"
+trap 'rm -rf "$TEST_TMP_ROOT"' EXIT
+
+fail() {
+  echo "FAIL: $*" >&2
+  exit 1
+}
+
+assert_link_points_to() {
+  local link_path="$1" expected_path="$2" actual_path
+  [ -L "$link_path" ] || fail "Expected symlink: $link_path"
+  actual_path="$(readlink -f "$link_path")"
+  [ "$actual_path" = "$expected_path" ] \
+    || fail "$link_path points to $actual_path, expected $expected_path"
+}
+
+assert_not_exists() {
+  local path="$1"
+  [ ! -e "$path" ] && [ ! -L "$path" ] || fail "Path should not exist: $path"
+}
+
+setup_package() {
+  local fixture_root="$1" package_dir="$fixture_root/source with spaces/proxy-client"
+  mkdir -p \
+    "$package_dir/.local/bin" \
+    "$package_dir/.config/proxy-client"
+  cp -a \
+    "$REPO_ROOT/proxy-client/.local/bin/proxy-client" \
+    "$package_dir/.local/bin/proxy-client"
+  cp -a \
+    "$REPO_ROOT/proxy-client/.config/proxy-client/shell.bash" \
+    "$REPO_ROOT/proxy-client/.config/proxy-client/examples" \
+    "$package_dir/.config/proxy-client/"
+  cp -a \
+    "$REPO_ROOT/proxy-client/.stow-local-ignore" \
+    "$REPO_ROOT/proxy-client/README.md" \
+    "$REPO_ROOT/proxy-client/install.sh" \
+    "$package_dir/"
+  printf '%s\n' 'MACHINE_CONFIG_SENTINEL' > "$package_dir/.config/proxy-client/config"
+  printf '%s\n' 'PRIVATE_PROFILE_SENTINEL' > "$package_dir/.config/proxy-client/default.url"
+  printf '%s\n' "$package_dir"
+}
+
+run_package_install() {
+  local package_dir="$1" home_dir="$2" stow_bin="$3"
+  shift 3
+  (
+    cd "$TEST_TMP_ROOT"
+    HOME="$home_dir" STOW_BIN="$stow_bin" \
+      "$package_dir/install.sh" "$@"
+  )
+}
+
+test_installs_same_public_artifacts_without_stow() {
+  local fixture_root package_dir home_dir output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+
+  output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow --no-shell-setup
+  )"
+
+  printf '%s' "$output" | grep -Fq 'без Stow' \
+    || fail "Expected direct-symlink method in output"
+  printf '%s' "$output" | grep -Fq \
+    'source ~/.config/proxy-client/shell.bash' \
+    || fail "Expected direct shell-module hint with --no-shell-setup"
+  [ -d "$home_dir/.local/bin" ] && [ ! -L "$home_dir/.local/bin" ] \
+    || fail "Expected ~/.local/bin to be a real directory"
+  [ -d "$home_dir/.config/proxy-client" ] \
+    && [ ! -L "$home_dir/.config/proxy-client" ] \
+    || fail "Expected proxy-client config home to be a real directory"
+  assert_link_points_to \
+    "$home_dir/.local/bin/proxy-client" \
+    "$package_dir/.local/bin/proxy-client"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/shell.bash" \
+    "$package_dir/.config/proxy-client/shell.bash"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/examples" \
+    "$package_dir/.config/proxy-client/examples"
+  assert_not_exists "$home_dir/.config/proxy-client/config"
+  assert_not_exists "$home_dir/.config/proxy-client/default.url"
+  assert_not_exists "$home_dir/README.md"
+  assert_not_exists "$home_dir/install.sh"
+  assert_not_exists "$home_dir/.bashrc"
+}
+
+test_configures_bash_once_by_default() {
+  local fixture_root package_dir home_dir output marker_count path_count source_count
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+
+  run_package_install "$package_dir" "$home_dir" missing-stow >/dev/null
+  output="$(run_package_install "$package_dir" "$home_dir" missing-stow)"
+
+  marker_count="$(grep -Fxc '# >>> proxy-client >>>' "$home_dir/.bashrc")"
+  path_count="$(grep -Fc 'export PATH="$HOME/.local/bin:$PATH"' "$home_dir/.bashrc")"
+  source_count="$(
+    grep -Fc \
+      '[ -f "$HOME/.config/proxy-client/shell.bash" ] && source "$HOME/.config/proxy-client/shell.bash"' \
+      "$home_dir/.bashrc"
+  )"
+  [ "$marker_count" -eq 1 ] || fail "Expected one managed Bash block"
+  [ "$path_count" -eq 1 ] || fail "Expected one ~/.local/bin PATH line"
+  [ "$source_count" -eq 1 ] || fail "Expected one shell module source line"
+  printf '%s' "$output" | grep -Fq 'source ~/.bashrc' \
+    || fail "Expected current-session reload hint"
+}
+
+test_installs_same_public_artifacts_with_stow() {
+  local fixture_root package_dir home_dir output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+
+  output="$(run_package_install "$package_dir" "$home_dir" stow --no-shell-setup)"
+
+  printf '%s' "$output" | grep -Fq 'с помощью Stow' \
+    || fail "Expected Stow method in output"
+  [ -d "$home_dir/.local/bin" ] && [ ! -L "$home_dir/.local/bin" ] \
+    || fail "Expected ~/.local/bin to be a real directory"
+  [ -d "$home_dir/.config/proxy-client" ] \
+    && [ ! -L "$home_dir/.config/proxy-client" ] \
+    || fail "Expected proxy-client config home to be a real directory"
+  assert_link_points_to \
+    "$home_dir/.local/bin/proxy-client" \
+    "$package_dir/.local/bin/proxy-client"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/shell.bash" \
+    "$package_dir/.config/proxy-client/shell.bash"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/examples" \
+    "$package_dir/.config/proxy-client/examples"
+  assert_not_exists "$home_dir/.config/proxy-client/config"
+  assert_not_exists "$home_dir/.config/proxy-client/default.url"
+  assert_not_exists "$home_dir/README.md"
+  assert_not_exists "$home_dir/install.sh"
+}
+
+test_rejects_linked_parent_directories_before_changes() {
+  local fixture_root package_dir home_dir external_local external_config output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  external_local="$fixture_root/external-local"
+  external_config="$fixture_root/external-config"
+  mkdir -p "$home_dir" "$external_local" "$external_config"
+  ln -s "$external_local" "$home_dir/.local"
+  ln -s "$external_config" "$home_dir/.config"
+
+  if output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow 2>&1
+  )"; then
+    fail "Expected linked parent directories to be rejected"
+  fi
+
+  printf '%s' "$output" | grep -Fq "$home_dir/.local" \
+    || fail "Expected ~/.local conflict in output"
+  printf '%s' "$output" | grep -Fq "$home_dir/.config" \
+    || fail "Expected ~/.config conflict in output"
+  assert_not_exists "$external_local/bin"
+  assert_not_exists "$external_config/proxy-client"
+  assert_not_exists "$home_dir/.bashrc"
+}
+
+test_reports_all_target_conflicts_without_partial_install() {
+  local fixture_root package_dir home_dir other_target output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  other_target="$fixture_root/other-target"
+  mkdir -p "$home_dir/.local/bin" "$home_dir/.config/proxy-client/shell.bash"
+  printf '%s\n' 'KEEP_CLI' > "$home_dir/.local/bin/proxy-client"
+  printf '%s\n' 'KEEP_TARGET' > "$other_target"
+  ln -s "$other_target" "$home_dir/.config/proxy-client/examples"
+
+  if output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow 2>&1
+  )"; then
+    fail "Expected all target conflicts to be rejected"
+  fi
+
+  printf '%s' "$output" | grep -Fq "$home_dir/.local/bin/proxy-client" \
+    || fail "Expected CLI conflict in output"
+  printf '%s' "$output" | grep -Fq "$home_dir/.config/proxy-client/shell.bash" \
+    || fail "Expected shell module conflict in output"
+  printf '%s' "$output" | grep -Fq "$home_dir/.config/proxy-client/examples" \
+    || fail "Expected examples conflict in output"
+  grep -Fq 'KEEP_CLI' "$home_dir/.local/bin/proxy-client" \
+    || fail "Expected conflicting CLI file to stay unchanged"
+  [ -d "$home_dir/.config/proxy-client/shell.bash" ] \
+    || fail "Expected conflicting shell directory to stay unchanged"
+  assert_link_points_to "$home_dir/.config/proxy-client/examples" "$other_target"
+  assert_not_exists "$home_dir/.bashrc"
+}
+
+test_rejects_broken_link_without_creating_other_targets() {
+  local fixture_root package_dir home_dir output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir/.local/bin"
+  ln -s "$fixture_root/missing-cli" "$home_dir/.local/bin/proxy-client"
+
+  if output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow 2>&1
+  )"; then
+    fail "Expected broken target link to be rejected"
+  fi
+
+  printf '%s' "$output" | grep -Fq "$home_dir/.local/bin/proxy-client" \
+    || fail "Expected broken CLI link in output"
+  [ -L "$home_dir/.local/bin/proxy-client" ] \
+    || fail "Expected broken CLI link to stay unchanged"
+  assert_not_exists "$home_dir/.config"
+  assert_not_exists "$home_dir/.bashrc"
+}
+
+test_preserves_machine_files_with_both_methods() {
+  local stow_bin fixture_root package_dir home_dir
+  for stow_bin in missing-stow stow; do
+    fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+    package_dir="$(setup_package "$fixture_root")"
+    home_dir="$fixture_root/home"
+    mkdir -p "$home_dir/.config/proxy-client"
+    printf '%s\n' 'HOME_CONFIG_SENTINEL' \
+      > "$home_dir/.config/proxy-client/config"
+    printf '%s\n' 'HOME_PROFILE_SENTINEL' \
+      > "$home_dir/.config/proxy-client/default.url"
+
+    run_package_install "$package_dir" "$home_dir" "$stow_bin" \
+      --no-shell-setup >/dev/null
+
+    [ ! -L "$home_dir/.config/proxy-client/config" ] \
+      || fail "Machine config must not become a symlink"
+    [ ! -L "$home_dir/.config/proxy-client/default.url" ] \
+      || fail "Private profile must not become a symlink"
+    grep -Fq 'HOME_CONFIG_SENTINEL' "$home_dir/.config/proxy-client/config" \
+      || fail "Machine config changed"
+    grep -Fq 'HOME_PROFILE_SENTINEL' "$home_dir/.config/proxy-client/default.url" \
+      || fail "Private profile changed"
+  done
+}
+
+test_accepts_existing_links_when_method_changes() {
+  local fixture_root package_dir home_dir
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+
+  run_package_install "$package_dir" "$home_dir" missing-stow \
+    --no-shell-setup >/dev/null
+  run_package_install "$package_dir" "$home_dir" stow \
+    --no-shell-setup >/dev/null
+
+  assert_link_points_to \
+    "$home_dir/.local/bin/proxy-client" \
+    "$package_dir/.local/bin/proxy-client"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/shell.bash" \
+    "$package_dir/.config/proxy-client/shell.bash"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/examples" \
+    "$package_dir/.config/proxy-client/examples"
+}
+
+test_stow_completes_partial_correct_installation() {
+  local fixture_root package_dir home_dir
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+
+  run_package_install "$package_dir" "$home_dir" missing-stow \
+    --no-shell-setup >/dev/null
+  rm "$home_dir/.config/proxy-client/shell.bash"
+
+  run_package_install "$package_dir" "$home_dir" stow \
+    --no-shell-setup >/dev/null
+
+  assert_link_points_to \
+    "$home_dir/.local/bin/proxy-client" \
+    "$package_dir/.local/bin/proxy-client"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/shell.bash" \
+    "$package_dir/.config/proxy-client/shell.bash"
+  assert_link_points_to \
+    "$home_dir/.config/proxy-client/examples" \
+    "$package_dir/.config/proxy-client/examples"
+}
+
+test_does_not_duplicate_full_dotfiles_shell_setup() {
+  local fixture_root package_dir home_dir source_count
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+  printf '%s\n' \
+    '[ -f ~/.config/proxy-client/shell.bash ] && source ~/.config/proxy-client/shell.bash' \
+    > "$home_dir/.bash_custom"
+  printf '%s\n' '[ -f ~/.bash_custom ] && source ~/.bash_custom' \
+    > "$home_dir/.bashrc"
+
+  run_package_install "$package_dir" "$home_dir" missing-stow >/dev/null
+
+  grep -Fq '# >>> proxy-client >>>' "$home_dir/.bashrc" \
+    || fail "Expected managed PATH block with full dotfiles"
+  grep -Fq 'export PATH="$HOME/.local/bin:$PATH"' "$home_dir/.bashrc" \
+    || fail "Expected ~/.local/bin setup with full dotfiles"
+  source_count="$(grep -Fc 'proxy-client/shell.bash' "$home_dir/.bashrc" || true)"
+  [ "$source_count" -eq 0 ] \
+    || fail "Standalone block duplicated full dotfiles module source"
+}
+
+test_rejects_damaged_managed_bash_block_before_changes() {
+  local fixture_root package_dir home_dir output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+  printf '%s\n' '# >>> proxy-client >>>' > "$home_dir/.bashrc"
+
+  if output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow 2>&1
+  )"; then
+    fail "Expected damaged managed Bash block to be rejected"
+  fi
+
+  printf '%s' "$output" | grep -Fq "$home_dir/.bashrc" \
+    || fail "Expected ~/.bashrc conflict in output"
+  [ "$(wc -l < "$home_dir/.bashrc")" -eq 1 ] \
+    || fail "Expected damaged Bash block to stay unchanged"
+  assert_not_exists "$home_dir/.local"
+  assert_not_exists "$home_dir/.config"
+}
+
+test_does_not_duplicate_existing_local_bin_path() {
+  local fixture_root package_dir home_dir path_count source_count
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+  printf '%s\n' 'export PATH="$HOME/.local/bin:$PATH"' > "$home_dir/.bashrc"
+
+  run_package_install "$package_dir" "$home_dir" missing-stow >/dev/null
+
+  path_count="$(grep -Fc 'export PATH="$HOME/.local/bin:$PATH"' "$home_dir/.bashrc")"
+  source_count="$(grep -Fc 'proxy-client/shell.bash' "$home_dir/.bashrc")"
+  [ "$path_count" -eq 1 ] || fail "Existing ~/.local/bin PATH line was duplicated"
+  [ "$source_count" -eq 1 ] || fail "Expected shell module source in managed block"
+}
+
+test_rejects_incomplete_source_before_changes() {
+  local fixture_root package_dir home_dir output
+  fixture_root="$(mktemp -d "$TEST_TMP_ROOT/fixture.XXXXXX")"
+  package_dir="$(setup_package "$fixture_root")"
+  home_dir="$fixture_root/home"
+  mkdir -p "$home_dir"
+  rm "$package_dir/.config/proxy-client/shell.bash"
+
+  if output="$(
+    run_package_install "$package_dir" "$home_dir" missing-stow 2>&1
+  )"; then
+    fail "Expected incomplete source package to be rejected"
+  fi
+
+  printf '%s' "$output" | grep -Fq 'исходного пакета' \
+    || fail "Expected source package error"
+  assert_not_exists "$home_dir/.local"
+  assert_not_exists "$home_dir/.config"
+  assert_not_exists "$home_dir/.bashrc"
+}
+
+main() {
+  test_installs_same_public_artifacts_without_stow
+  test_configures_bash_once_by_default
+  test_installs_same_public_artifacts_with_stow
+  test_rejects_linked_parent_directories_before_changes
+  test_reports_all_target_conflicts_without_partial_install
+  test_rejects_broken_link_without_creating_other_targets
+  test_preserves_machine_files_with_both_methods
+  test_accepts_existing_links_when_method_changes
+  test_stow_completes_partial_correct_installation
+  test_does_not_duplicate_full_dotfiles_shell_setup
+  test_rejects_damaged_managed_bash_block_before_changes
+  test_does_not_duplicate_existing_local_bin_path
+  test_rejects_incomplete_source_before_changes
+  echo "All standalone proxy-client install tests passed"
+}
+
+main "$@"