fix(installer): Survive copytoram, keep ISO repos, default to fish

- install_pacstrap: fall back to the live system's pacman -Q when the
  medium's pkglist is gone (copytoram unmounts bootmnt), and die on an
  empty list instead of pacstrapping only the essentials.
- screen_disk: find the live medium via archisosearchuuid when bootmnt
  is unmounted, and hide whole-disk sources (empty PKNAME).
- install_cachyos_repo: put [cachyos] ahead of [core] like the ISO build
  and add [chaotic-aur], so chaotic packages keep updating.
- install_user: create the user with fish; the 'none' login manager now
  autostarts Hyprland via ~/.config/fish/conf.d/alvin-hyprland.fish.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

airootfs/usr/local/bin/alvin-install

@@ -320,11 +320,20 @@ screen_disk() {
     header "Select Installation Disk"
     echo ""
 
-    local live_dev=""
+    # The boot medium: the bootmnt source, or - when copytoram unmounted it -
+    # the device carrying the archisosearchuuid= volume. A whole-disk source
+    # (hybrid ISO, sr0) has no PKNAME and is itself the disk to hide.
+    local live_dev="" src="" pk="" search_uuid=""
     if [[ -d /run/archiso/bootmnt ]]; then
-        local src
         src=$(findmnt -no SOURCE /run/archiso/bootmnt 2>/dev/null || true)
-        [[ -n "$src" ]] && live_dev="/dev/$(lsblk -no PKNAME "$src" 2>/dev/null | head -n1)"
+    fi
+    if [[ -z "$src" ]]; then
+        search_uuid=$(sed -n 's/.*archisosearchuuid=\([^[:space:]]*\).*/\1/p' /proc/cmdline)
+        [[ -n "$search_uuid" ]] && src=$(blkid -U "$search_uuid" 2>/dev/null || true)
+    fi
+    if [[ -n "$src" ]]; then
+        pk=$(lsblk -no PKNAME "$src" 2>/dev/null | head -n1 || true)
+        live_dev="/dev/${pk:-$(basename "$src")}"
     fi
 
     local disks=()
@@ -650,36 +659,47 @@ install_pacstrap() {
     local pkgs=()
     local dropped=()
     local filter_ok=false
+    local -a src_lines=()
 
+    # The medium's pkglist comes from `pacman -Q` at build time: lines are
+    # "name version". With copytoram the boot medium is unmounted and the
+    # file is gone - the live system's own `pacman -Q` is the same data.
     if [[ -f "$pkglist" ]]; then
-        # The medium's pkglist comes from `pacman -Q`: lines are "name version".
+        mapfile -t src_lines < "$pkglist"
-        # Parse only the first field, then drop names not resolvable in the live
+    else
-        # session's repos (e.g. local-aur packages are not configured there).
+        warn "${pkglist} not found (copytoram?) - using the live system's package list."
-        info "Syncing package databases for resolvability check..."
+        log "Pacstrap: ${pkglist} missing, falling back to pacman -Q"
-        if run_logged -s dot "pacman -Syy failed (resolvability check)" \
+        mapfile -t src_lines < <(pacman -Q 2>>"$LOG" || true)
-            pacman -Syy --noconfirm; then
-            declare -A available=()
-            local db_line
-            while IFS= read -r db_line; do
-                [[ -n "$db_line" ]] && available["$db_line"]=1
-            done < <(pacman -Slq 2>>"$LOG" || true)
-            (( ${#available[@]} > 0 )) && filter_ok=true
-        else
-            warn "pacman -Syy failed (output above) — installing without resolvability filter."
-        fi
-
-        local line pkg
-        while IFS= read -r line; do
-            [[ -z "$line" ]] && continue
-            pkg=${line%% *}
-            skip "$pkg" && continue
-            if $filter_ok && [[ -z "${available[$pkg]:-}" ]]; then
-                dropped+=("$pkg")
-                continue
-            fi
-            pkgs+=("$pkg")
-        done < "$pkglist"
     fi
+    (( ${#src_lines[@]} > 0 )) \
+        || die "No package list: ${pkglist} is missing and pacman -Q returned nothing."
+
+    # Parse only the first field, then drop names not resolvable in the
+    # live session's repos (incl. [local-aur] = /opt/localrepo).
+    info "Syncing package databases for resolvability check..."
+    if run_logged -s dot "pacman -Syy failed (resolvability check)" \
+        pacman -Syy --noconfirm; then
+        declare -A available=()
+        local db_line
+        while IFS= read -r db_line; do
+            [[ -n "$db_line" ]] && available["$db_line"]=1
+        done < <(pacman -Slq 2>>"$LOG" || true)
+        (( ${#available[@]} > 0 )) && filter_ok=true
+    else
+        warn "pacman -Syy failed (output above) — installing without resolvability filter."
+    fi
+
+    local line pkg
+    while IFS= read -r line; do
+        [[ -z "$line" ]] && continue
+        pkg=${line%% *}
+        skip "$pkg" && continue
+        if $filter_ok && [[ -z "${available[$pkg]:-}" ]]; then
+            dropped+=("$pkg")
+            continue
+        fi
+        pkgs+=("$pkg")
+    done < <(printf '%s\n' "${src_lines[@]}")
 
     if (( ${#dropped[@]} > 0 )); then
         warn "Skipped ${#dropped[@]} pkglist package(s) not found in configured repos:"
@@ -729,14 +749,24 @@ install_fstab() {
 }
 
 install_cachyos_repo() {
-    info "Configuring CachyOS repository..."
+    info "Configuring CachyOS and chaotic-aur repositories..."
+    local conf="${TARGET}/etc/pacman.conf"
 
-    if ! grep -q '\[cachyos\]' "${TARGET}/etc/pacman.conf" 2>/dev/null; then
+    # Same order as the ISO build (pacman.conf): cachyos ahead of [core], so
-        cat >> "${TARGET}/etc/pacman.conf" <<'REPO'
+    # packages in both keep resolving to the cachyos builds pacstrap
-
+    # installed instead of flipping to extra on the first -Syu.
-[cachyos]
+    if ! grep -q '^\[cachyos\]' "$conf" 2>/dev/null; then
-Include = /etc/pacman.d/cachyos-mirrorlist
+        if grep -q '^\[core\]' "$conf"; then
-REPO
+            sed -i '0,/^\[core\]/s//[cachyos]\nInclude = \/etc\/pacman.d\/cachyos-mirrorlist\n\n[core]/' "$conf"
+        else
+            printf '\n[cachyos]\nInclude = /etc/pacman.d/cachyos-mirrorlist\n' >> "$conf"
+        fi
+    fi
+    # chaotic-aur packages (yay, ...) came from the ISO - without the repo
+    # they turn foreign and never update.
+    if ! grep -q '^\[chaotic-aur\]' "$conf" 2>/dev/null \
+        && [[ -f "${TARGET}/etc/pacman.d/chaotic-mirrorlist" ]]; then
+        printf '\n[chaotic-aur]\nInclude = /etc/pacman.d/chaotic-mirrorlist\n' >> "$conf"
     fi
 
     # [local-aur] lives only on the live medium (file:///opt/localrepo). The
@@ -745,7 +775,7 @@ REPO
     # but drop it anyway in case that ever changes.
     sed -i '/^\[local-aur\]$/,/^$/d' "${TARGET}/etc/pacman.conf" 2>/dev/null || true
 
-    ok "CachyOS repo configured."
+    ok "CachyOS + chaotic-aur repos configured."
 }
 
 install_timezone() {
@@ -819,7 +849,12 @@ install_user() {
 
     cp -rT /etc/skel "${TARGET}/etc/skel"
 
-    arch-chroot "$TARGET" useradd -m -G wheel -s /bin/bash "$USERNAME"
+    # fish is the default shell (skel ships its config); bash only if the
+    # target somehow lacks it, so the account is never left without a shell.
+    local user_shell="/usr/bin/fish"
+    [[ -x "${TARGET}${user_shell}" ]] || user_shell="/bin/bash"
+    arch-chroot "$TARGET" useradd -m -G wheel -s "$user_shell" "$USERNAME"
+    log "User shell: ${user_shell}"
 
     printf '%s:%s\n' "$USERNAME" "$PASS" | arch-chroot "$TARGET" chpasswd
 
@@ -1770,8 +1805,25 @@ install_none_profile() {
             profile="${home_in_target}/.zprofile"
             ;;
         *fish)
-            warn "fish is the login shell - skipping tty autostart; run 'Hyprland' after login."
+            # conf.d is sourced automatically on every start. This runs after
-            log "tty profile: skipped (fish shell)"
+            # install_end4_dots, so end-4's rsync --delete of ~/.config/fish
+            # cannot remove it.
+            local fish_cfg="${TARGET}${home_in_target}/.config/fish"
+            if grep -rqsE 'start-hyprland|exec Hyprland|auto-Hypr' \
+                "${fish_cfg}/config.fish" "${fish_cfg}/conf.d"; then
+                log "tty profile: fish config already launches Hyprland - skipped"
+                return 0
+            fi
+            mkdir -p "${fish_cfg}/conf.d"
+            cat > "${fish_cfg}/conf.d/alvin-hyprland.fish" <<'FISH'
+# alvin-install: start Hyprland on tty1 (pam_systemd sets XDG_VTNR).
+if status is-login; and test -z "$WAYLAND_DISPLAY"; and test "$XDG_VTNR" = 1
+    exec Hyprland
+end
+FISH
+            chown -R "$owner" "${fish_cfg}/conf.d" 2>/dev/null || true
+            ok "tty login will start Hyprland via ~/.config/fish/conf.d/alvin-hyprland.fish."
+            log "tty profile: fish conf.d/alvin-hyprland.fish (exec Hyprland on VT1)"
             return 0
             ;;
         *)