Initial commit: Paperwall, a standalone e-ink dashboard

Navidrome now-playing, clock, and weather for a Waveshare epd4in0e panel,
with a local web UI and install/uninstall scripts for the Pi.

uninstall_inkypi.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+# Reverses what InkyPi's install.sh did, based on reading that script
+# directly (fatihak/InkyPi/install/install.sh). Run this ON the Pi, as root.
+#
+# Paperwall is fully standalone -- it vendors its own copy of the Waveshare
+# driver files and has its own venv, so it doesn't need InkyPi installed at
+# all. This script is purely optional cleanup for whenever you're done with
+# InkyPi as a fallback.
+#
+# Deliberately leaves alone:
+#   - SPI/I2C being enabled in /boot/firmware/config.txt -- Paperwall
+#     needs those same interfaces for the same panel. Disabling them
+#     would break it too.
+#   - zramswap / earlyoom services -- these are general Pi memory-management
+#     helpers install.sh set up (Bookworm zramswap + earlyoom), not InkyPi
+#     app state. Generically useful to keep running. Uncomment below if you
+#     really want them gone.
+#   - The git clone at ~/InkyPi -- not needed by Paperwall for anything, just
+#     left in place in case you want InkyPi back someday. Delete manually or
+#     pass --purge-clone.
+#
+# Usage: sudo bash uninstall_inkypi.sh [--purge-clone]
+
+set -euo pipefail
+
+if [ "$EUID" -ne 0 ]; then
+  echo "Run as root (sudo bash uninstall_inkypi.sh)" >&2
+  exit 1
+fi
+
+echo "==> Stopping and disabling inkypi.service"
+systemctl disable --now inkypi.service 2>/dev/null || echo "  (not running/installed, skipping)"
+
+echo "==> Removing systemd unit"
+rm -f /etc/systemd/system/inkypi.service
+systemctl daemon-reload
+
+echo "==> Removing installed app (/usr/local/inkypi, includes venv_inkypi)"
+rm -rf /usr/local/inkypi
+
+echo "==> Removing CLI executable (/usr/local/bin/inkypi)"
+rm -f /usr/local/bin/inkypi
+
+if [[ "${1:-}" == "--purge-clone" ]]; then
+  echo "==> Removing git clone at ~/InkyPi (--purge-clone was passed)"
+  echo "    NOTE: this also deletes src/config/device.json, which has your"
+  echo "    old Navidrome credentials in plaintext -- fine if that's the point."
+  rm -rf ~/InkyPi
+else
+  echo "==> Leaving ~/InkyPi in place (not needed by Paperwall, just kept as a fallback)."
+  echo "    Re-run with --purge-clone to remove it too."
+  echo "    NOTE: ~/InkyPi/src/config/device.json still has your old Navidrome"
+  echo "    credentials in plaintext if you want to wipe just that file instead."
+fi
+
+cat <<'MSG'
+
+==> InkyPi app removed. Left untouched on purpose:
+    - SPI/I2C interfaces in /boot/firmware/config.txt (Paperwall needs them)
+    - zramswap / earlyoom services (general Pi memory helpers, not InkyPi-specific)
+
+    To also remove those memory-management services:
+        sudo systemctl disable --now zramswap
+        sudo apt remove -y zram-tools
+        sudo systemctl disable --now earlyoom
+        sudo apt remove -y earlyoom
+MSG