feat(installer): add shell_rc preference to skip copying .*rcs to skel

Adds a dialog (interactive + answerfile) letting the user choose whether
to copy the dotfiles' .zshrc / .bashrc / .vimrc into /etc/skel, or leave
system defaults in place. The choice is persisted as shell_rc in the
answerfile JSON and respected by both the TUI installer and the generator.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup/generate-answerfile.sh

@@ -179,6 +179,7 @@ dialog --backtitle "$BACKTITLE" \
 AF_COMPONENTS=""
 AF_DE="none"
 AF_APPS=""
+AF_SHELL_RC="dotfiles"
 AF_COLOR_TEXT=""
 AF_COLOR_BG=""
 AF_COLOR_HIGHLIGHT=""
@@ -294,6 +295,14 @@ if [[ "$AF_RUN_TUI" == "true" ]]; then
         "qemu"             "QEMU/KVM         full virt stack + virt-manager GUI"     off \
         3>&1 1>&2 2>&3) || AF_APPS=""
 
+    # ── Shell RC preference ───────────────────────────────────────────────────
+    AF_SHELL_RC=$(dialog --backtitle "$BACKTITLE" \
+        --title " Shell Config for New Users " \
+        --menu "\n  Should new users on this machine inherit the dotfiles' rc files?\n  (Controls what gets copied to /etc/skel)\n" 13 68 2 \
+        "dotfiles" "Use the_miro's .zshrc / .bashrc / .vimrc from dotfiles" \
+        "defaults" "Skip — use system defaults for new users" \
+        3>&1 1>&2 2>&3) || AF_SHELL_RC="defaults"
+
     # ── Colorway ──────────────────────────────────────────────────────────────
     # Read defaults from repo colors.conf
     declare -A _cdef
@@ -355,6 +364,7 @@ SUMMARY+="  Encrypt:    $AF_ENCRYPT\n"
 SUMMARY+="  FIDO2 root: $AF_FIDO2_ROOT  /  FIDO2 user: $AF_FIDO2_USER\n"
 SUMMARY+="  Run TUI:    $AF_RUN_TUI\n"
 [[ -n "$AF_DE" && "$AF_DE" != "none" ]] && SUMMARY+="  DE:         $AF_DE\n"
+SUMMARY+="  Shell rc:   $AF_SHELL_RC\n"
 [[ -n "$AF_COLOR_TEXT" ]] && SUMMARY+="  Colors:     custom\n"
 
 dialog --backtitle "$BACKTITLE" \
@@ -392,7 +402,8 @@ mkdir -p "$(dirname "$OUTPUT")"
     printf '  "run_tui": %s,\n'      "$AF_RUN_TUI"
     printf '  "components": %s,\n'   "$(_words_to_json_array "$AF_COMPONENTS")"
     printf '  "desktop_environment": %s,\n' "$(json_str "$AF_DE")"
-    printf '  "apps": %s'            "$(_words_to_json_array "$AF_APPS")"
+    printf '  "apps": %s,\n'          "$(_words_to_json_array "$AF_APPS")"
+    printf '  "shell_rc": %s'         "$(json_str "$AF_SHELL_RC")"
 
     if [[ -n "$AF_COLOR_TEXT" ]]; then
         printf ',\n  "colors": {\n'

setup/tui-install.sh

@@ -246,6 +246,7 @@ AF_HOSTNAME=""
 AF_COMPONENTS=""
 AF_DE="none"
 AF_APPS=""
+AF_SHELL_RC="dotfiles"
 AF_COLOR_TEXT=""
 AF_COLOR_BG=""
 AF_COLOR_HIGHLIGHT=""
@@ -263,6 +264,7 @@ load_answerfile() {
     AF_COMPONENTS=$(jq -r '(.components // []) | join(" ")' "$ANSWERFILE")
     AF_DE=$(jq -r '.desktop_environment // "none"' "$ANSWERFILE")
     AF_APPS=$(jq -r '(.apps // []) | join(" ")' "$ANSWERFILE")
+    AF_SHELL_RC=$(jq -r '.shell_rc // "dotfiles"' "$ANSWERFILE")
     # Color values are optional; an empty string means "keep the repo default".
     AF_COLOR_TEXT=$(jq -r '.colors.COLOR_TEXT // ""' "$ANSWERFILE")
     AF_COLOR_BG=$(jq -r '.colors.COLOR_BG // ""' "$ANSWERFILE")
@@ -519,6 +521,18 @@ else
         3>&1 1>&2 2>&3) || SELECTED_APPS=""
 fi
 
+# ── Shell RC preference ───────────────────────────────────────────────────────
+if $ANSWERFILE_MODE; then
+    SHELL_RC="$AF_SHELL_RC"
+else
+    SHELL_RC=$(dialog --backtitle "$BACKTITLE" \
+        --title " Shell Config for New Users " \
+        --menu "\n  Should new users on this machine inherit the dotfiles' rc files?\n  (Controls what gets copied to /etc/skel)\n" 13 68 2 \
+        "dotfiles" "Use the_miro's .zshrc / .bashrc / .vimrc from dotfiles" \
+        "defaults" "Skip — use system defaults for new users" \
+        3>&1 1>&2 2>&3) || SHELL_RC="defaults"
+fi
+
 # ── Confirmation (interactive mode only) ──────────────────────────────────────
 if ! $ANSWERFILE_MODE; then
     # Build a human-readable summary of everything that will be installed so the
@@ -530,6 +544,8 @@ if ! $ANSWERFILE_MODE; then
     [[ "$COMPONENTS" == *"svc"*  ]] && SUMMARY+="  ✦ Core services\n"
     [[ "$COMPONENTS" == *"shell"* ]] && SUMMARY+="  ✦ Shell setup\n"
     [[ "$DE" != "none" && "$DE" != "" ]] && SUMMARY+="  ✦ Desktop environment: $DE\n"
+    [[ "$SHELL_RC" == "dotfiles" ]] && SUMMARY+="  ✦ Shell rc files → /etc/skel (dotfiles)\n" \
+        || SUMMARY+="  ✦ Shell rc files → /etc/skel (system defaults)\n"
 
     if [[ -n "$SELECTED_APPS" ]]; then
         SUMMARY+="\n  Applications:\n"
@@ -831,11 +847,13 @@ if [[ -d "$HOME/.config" ]]; then
     # itself, making the merge non-destructive if /etc/skel/.config already exists.
     sudo cp -r "$HOME/.config/." /etc/skel/.config/
 fi
-# Copy themes, shell rc files, and vimrc only if they were actually created during install.
 [[ -d "$HOME/.themes" ]] && { sudo mkdir -p /etc/skel/.themes; sudo cp -r "$HOME/.themes/." /etc/skel/.themes/; }
-[[ -f "$HOME/.zshrc"  ]] && sudo cp "$HOME/.zshrc"  /etc/skel/.zshrc
+# Copy shell rc files to skel only if the user opted in to the dotfiles configs.
-[[ -f "$HOME/.bashrc" ]] && sudo cp "$HOME/.bashrc" /etc/skel/.bashrc
+if [[ "$SHELL_RC" == "dotfiles" ]]; then
-[[ -f "$HOME/.vimrc"  ]] && sudo cp "$HOME/.vimrc"  /etc/skel/.vimrc
+    [[ -f "$HOME/.zshrc"  ]] && sudo cp "$HOME/.zshrc"  /etc/skel/.zshrc
+    [[ -f "$HOME/.bashrc" ]] && sudo cp "$HOME/.bashrc" /etc/skel/.bashrc
+    [[ -f "$HOME/.vimrc"  ]] && sudo cp "$HOME/.vimrc"  /etc/skel/.vimrc
+fi
 
 # ── Done ──────────────────────────────────────────────────────────────────────
 if $ANSWERFILE_MODE; then