test: cover install_terminal_prereqs apt branch and Hyprland-skip/TerminalLook-completes composition

- install_terminal_prereqs's apt branch was untested even though the
  existing test already stubbed apt-get; added a dedicated test asserting
  the exact apt-get update / apt-get install -y zsh git curl fzf calls with
  no pacman on PATH.
- Added an end-to-end test (both components picked, Hyprland's prerequisite
  missing) exercising the exact composition Task 2's refactor exists for:
  Hyprland skips cleanly via check_arch failing, and TerminalLook (Kali
  look) still runs to completion in the same main() invocation. Uses a
  clean-room PATH (real coreutils/git/bash symlinked in, no-op stand-ins for
  apt-get/sudo/zsh/chsh, pacman never added) so the assertion holds
  regardless of whether the host running the tests actually has pacman.

Addresses findings 5 and 6 from the final whole-branch review.

tests/install.bats

@@ -486,6 +486,55 @@ EOF
     rm -rf "$tmp_home" "$stub_bin"
 }
 
+@test "main runs both components: Hyprland skips cleanly on missing prereq, TerminalLook still completes" {
+    # Regression test for the Global Constraint that one module's failed
+    # prerequisite check must never block another module from running.
+    # Both components are picked; PATH is a clean room containing only the
+    # exact binaries this path needs, with pacman deliberately never added
+    # (not stubbed out -- simply absent), so apply_hyprland's check_arch
+    # fails regardless of whether the host machine actually has pacman, and
+    # it must skip via `return 0`, not abort the script under
+    # `set -euo pipefail`. apply_terminal_look (Kali look, no oh-my-zsh clone
+    # needed) must still run to completion afterward.
+    local tmp_home
+    tmp_home="$(mktemp -d)"
+    local stub_bin
+    stub_bin="$(mktemp -d)"
+
+    # Real passthrough binaries the Hyprland-skip + Kali terminal-look path
+    # actually calls (bash for the outer `run bash -c`, plus coreutils/git
+    # used by ensure_repo_files/apply_terminal_look_kali/write_zshrc_kali).
+    for real in bash dirname mkdir cp cat git; do
+        ln -s "$(command -v "$real")" "$stub_bin/$real"
+    done
+
+    # No-op stand-ins for everything else the script shells out to on this
+    # path -- deliberately no pacman here.
+    for cmd in curl apt-get sudo zsh chsh; do
+        cat > "$stub_bin/$cmd" <<'EOF'
+#!/bin/bash
+exit 0
+EOF
+        chmod +x "$stub_bin/$cmd"
+    done
+
+    PATH="$stub_bin" \
+    HOME="$tmp_home" \
+    DOTEVO_NONINTERACTIVE=1 \
+    DOTEVO_COMPONENTS="Hyprland TerminalLook" \
+    DOTEVO_TERMINAL_LOOK="Kali" \
+    run bash -c "$(cat "${BATS_TEST_DIRNAME}/../install.sh")"
+
+    [ "$status" -eq 0 ]
+    [[ "$output" == *"skipping Hyprland rice"* ]]
+    [[ "$output" != *"unbound variable"* ]]
+    [[ "$output" != *"install.sh: line"* ]]
+    [[ "$output" == *"dotevo: done."* ]]
+    [ -f "$tmp_home/.zshrc" ]
+
+    rm -rf "$tmp_home" "$stub_bin"
+}
+
 @test "detect_pkg_manager finds pacman first when present" {
     source "${BATS_TEST_DIRNAME}/../install.sh"
     local stub_bin
@@ -547,6 +596,27 @@ EOF
     rm -rf "$tmp_home" "$stub_bin"
 }
 
+@test "install_terminal_prereqs calls the right install command on apt (no pacman on PATH)" {
+    source "${BATS_TEST_DIRNAME}/../install.sh"
+    local tmp_home stub_bin
+    tmp_home="$(mktemp -d)"
+    stub_bin="$(mktemp -d)"
+
+    for cmd in apt-get sudo; do
+        cat > "$stub_bin/$cmd" <<EOF
+#!/bin/bash
+echo "$cmd \$*" >> "$tmp_home/log"
+EOF
+        chmod +x "$stub_bin/$cmd"
+    done
+
+    PATH="$stub_bin" install_terminal_prereqs
+    grep -q 'apt-get update' "$tmp_home/log"
+    grep -q 'apt-get install -y zsh git curl fzf' "$tmp_home/log"
+
+    rm -rf "$tmp_home" "$stub_bin"
+}
+
 @test "install_terminal_prereqs fails clearly on an unrecognized package manager" {
     source "${BATS_TEST_DIRNAME}/../install.sh"
     local stub_bin