Make ./install something you could hand a stranger

The audit's third tier: everything between this installer and a fresh machine
it has never met.

The one path that could cost a person their display: the interview probes
Secure Boot with mokutil, which install-packages had not installed yet, so on
a minimal base the MOK question silently never fired -- and install-hardware
still installed akmod-nvidia and blacklisted nouveau, arming a reboot into an
unloadable driver with its fallback disabled. The probe tools (pciutils,
mokutil, fwupd) now bootstrap beside gum, and install-hardware re-checks
Secure Boot for itself and refuses the driver rather than the display.

Secrets leave the checkout: the personal environment moves to
~/.config/panama/env at mode 600 by migration, and .bashrc sources it with a
permission check that quietly re-tightens drift. change-settings no longer
overwrites /etc/dnf/dnf.conf -- two performance keys are set additively, the
defaultyes=True that made every `dnf remove` treat Enter as yes is gone, and
a migration strips it from machines that already received it.

Package installation survives the world changing: the initial and desktop
lists run with --skip-unavailable and a report_missing pass that names what
was skipped (resolved through --whatprovides, so capability names like awk
do not cry wolf); the openh264, appstream and core-group extras go through
soft; RustDesk resolves its RPM for the machine's own architecture; and the
Claude Desktop repository script is fetched to a kept file and run, never
piped from the network into root.

The hardware predicates stop guessing: a wireless mouse's scope=Device
battery no longer turns a tower into a laptop, USB-PD-only machines read
their power state from the battery's own status instead of being permanently
"on AC", the lid falls back to logind's LidClosed where ACPI is silent, and
charge limits reach every pack of a two-battery machine in one authorization
-- with the reported percentage summed across packs.

And the parsers stop assuming this machine: snapper is read through
--machine-readable csv with named columns instead of a localized box-drawing
table, and reports whether snapshots are even possible so ext4 and
unconfigured-btrfs stop looking identical; fprintd is parsed under LC_ALL=C;
the hypridle drop-in resolves the binary it points at; the recorder's render
node became an "auto" token resolved at record time; update-grub writes the
config its firmware actually boots; the nvm prompt hook and the SSH tmux
takeover are guarded; hipblas and rocm-opencl move to an opt-in gpu-compute
category; and the two interactive python tools' libraries are declared.

Claude-Session: https://claude.ai/code/session_01Epx9ZC1gwm81K3jm9x9CKh

config/dot/quickshell/scripts/panama-battery

@@ -31,6 +31,22 @@ battery_dir() {
     "$HW" battery-path 2>/dev/null
 }
 
+# Every system battery, for the machines that have two. The primary pack
+# answers `paths` and drives the watch files; these answer the questions
+# where ignoring the second pack gives a wrong answer -- the total charge,
+# and which packs a threshold write must reach.
+all_battery_dirs() {
+    local supply type scope
+    for supply in "$SYS"/class/power_supply/*; do
+        [[ -r "$supply/type" ]] || continue
+        type="$(cat "$supply/type" 2>/dev/null)"
+        [[ "$type" == "Battery" ]] || continue
+        scope="$(cat "$supply/scope" 2>/dev/null || echo System)"
+        [[ "$scope" == "Device" ]] && continue
+        printf '%s\n' "$supply"
+    done
+}
+
 # The mains supply, if the machine has one. A desktop has none, and that is
 # not an error: panama-hw's `ac` predicate treats "no mains at all" as being on
 # wall power, and the shell falls back to the same assumption.
@@ -78,6 +94,21 @@ cmd_status() {
         capacity="$(read_int "$battery/capacity")" || capacity=""
         [[ -r "$battery/status" ]] && state="$(cat "$battery/status" 2>/dev/null)"
         threshold="$(read_int "$battery/charge_control_end_threshold")" || threshold=0
+
+        # With two packs, one pack's percentage is not the machine's: sum the
+        # stored and full energy across every system battery and answer with
+        # the real total. Single-battery machines never reach this.
+        local dirs=() dir now full total_now=0 total_full=0
+        mapfile -t dirs < <(all_battery_dirs)
+        if (( ${#dirs[@]} > 1 )); then
+            for dir in "${dirs[@]}"; do
+                now="$(read_int "$dir/energy_now" || read_int "$dir/charge_now")" || continue
+                full="$(read_int "$dir/energy_full" || read_int "$dir/charge_full")" || continue
+                total_now=$(( total_now + now ))
+                total_full=$(( total_full + full ))
+            done
+            (( total_full > 0 )) && capacity=$(( (total_now * 100 + total_full / 2) / total_full ))
+        fi
     fi
     if [[ -n "$mains" ]]; then
         online="$(read_int "$mains/online")" || online=0
@@ -95,19 +126,25 @@ cmd_set_threshold() {
     [[ "$value" =~ ^[0-9]+$ ]] || { echo 'set-threshold needs a percentage' >&2; return 2; }
     (( value >= 50 && value <= 100 )) || { echo 'threshold must be between 50 and 100' >&2; return 2; }
 
-    battery="$(battery_dir)" || { echo 'no battery on this machine' >&2; return 1; }
-    file="$battery/charge_control_end_threshold"
-    [[ -e "$file" ]] || { echo 'this machine cannot set a charge threshold' >&2; return 1; }
+    # Every pack that has the attribute, not just the first: capping one
+    # battery of a two-battery machine leaves the other charging to full,
+    # which is the opposite of what the person asked for.
+    local files=() dir
+    while IFS= read -r dir; do
+        [[ -e "$dir/charge_control_end_threshold" ]] && files+=("$dir/charge_control_end_threshold")
+    done < <(all_battery_dirs)
+    (( ${#files[@]} > 0 )) || { echo 'this machine cannot set a charge threshold' >&2; return 1; }
 
     # tee rather than a redirect: the redirect is performed by the calling
-    # shell, which is not the one holding root.
+    # shell, which is not the one holding root. One authorization writes every
+    # pack.
     "$PANAMA_PATH/bin/panama-sudo" \
         --reason "Capping battery charging at ${value}% to reduce wear" \
-        -- sh -c "printf '%s\n' '$value' | tee '$file' >/dev/null" || return 1
+        -- sh -c "printf '%s\n' '$value' | tee ${files[*]} >/dev/null" || return 1
 
     # Read it back rather than reporting success from the write's exit code:
     # some firmware silently clamps or ignores the value.
-    read_int "$file"
+    read_int "${files[0]}"
 }
 
 case "${1:-status}" in