fix(deploy): 노드/디스플레이 setup.sh 위치-독립화 — flatten 불필요

systemd 유닛의 /home/pi/<subdir> 경로를 설치 시점에 setup.sh가 $BASE=$(pwd) 로 sed 치환.
번들 폴더를 이름 그대로 /home/pi 아래 어디에 두든(USB 통째 복사 포함) 동작 → flatten 단계 제거.

- build_node_setup_sh: copy_block 을 sed "s#/home/pi/#$BASE/#g" | sudo tee 로 교체, BASE 추가
- display setup.sh: 동일 방식(+ 기존 유닛 경로 버그 수정 — /home/pi/display 하드코딩이
  실제 설치경로와 불일치해 서비스 기동 실패하던 것을 $BASE 치환으로 해소)
- SETUP.md(노드·디스플레이): flatten 지침 제거, USB '폴더째 복사 후 cd·실행' 로 갱신

tools/make_deploy_bundles.py

@@ -188,8 +188,11 @@ def build_node_setup_sh(meta: dict) -> str:
     install_block = "\n".join(
         f'echo "  -> {sp["sub"]}"\n( cd "{sp["sub"]}" && chmod +x install.sh && ./install.sh )'
         for sp in specs)
+    # Inject THIS bundle's real path ($BASE) into each unit's /home/pi/<sub> paths at install
+    # time, so the node works from wherever it was copied (no flatten to /home/pi required).
     copy_block = "\n".join(
-        f'sudo cp "{sp["sub"]}/systemd/{sp["unit"]}.service" /etc/systemd/system/'
+        f'sed "s#/home/pi/#${{BASE}}/#g" "{sp["sub"]}/systemd/{sp["unit"]}.service" '
+        f'| sudo tee "/etc/systemd/system/{sp["unit"]}.service" >/dev/null'
         for sp in specs)
     enable_block = "\n".join(f'sudo systemctl enable --now {sp["unit"]}' for sp in specs)
     verify_block = "\n".join(
@@ -199,13 +202,16 @@ def build_node_setup_sh(meta: dict) -> str:
     return f'''#!/usr/bin/env bash
 # =============================================================================
 # setup.sh - combined fresh install for {meta["device_id"]}  ({subs})
-#   Run as the pi user from /home/pi:  bash setup.sh   (do NOT run with sudo - sudo is used internally)
-#   The service subdirs must sit at /home/pi/<subdir> (the stock systemd units reference those paths).
+#   Run as the pi user (never sudo):  bash setup.sh
+#   Location-independent: the systemd unit paths are auto-set to THIS folder's real path at
+#   install time, so the bundle can live anywhere under /home/pi (no flatten needed - copy the
+#   whole folder as-is, keep its name, cd in, run).
 #   Order: install every service -> register + enable all -> verify all -> harden ONCE (SSH lockdown).
 #   On any failure set -e stops BEFORE hardening -> SSH stays up for debugging.
 # =============================================================================
 set -euo pipefail
 cd "$(dirname "$0")"
+BASE="$(pwd)"   # actual install path of this bundle -> injected into the unit paths below
 
 if [ "$(id -u)" -eq 0 ]; then
   echo "[ERROR] Run as the pi user without sudo: bash setup.sh" >&2
@@ -251,18 +257,17 @@ Wiring / pinout: open {wiring} in a browser (self-contained - viewable offline).
 
 ## One-shot combined install (recommended)
 
-The service subfolders must end up at **/home/pi/{subs}** - the stock systemd units reference
-those exact paths. Flatten the node bundle straight into `/home/pi`:
+**No flatten needed.** `setup.sh` auto-sets the systemd unit paths to wherever this folder
+actually sits, so copy the whole folder as-is (keep its name `{name}`) anywhere under `/home/pi`
+and run it. Subfolders end up at `/home/pi/{name}/{subs}` and that is fine.
 
 ```bash
-# 1. Copy the node bundle to the Pi, then flatten it into /home/pi
-scp -r {name} pi@<PI_IP>:/home/pi/
-ssh pi@<PI_IP>
-mv ~/{name}/* ~/ && rmdir ~/{name}
+# 1. Copy this whole folder under /home/pi (USB or scp; keep the folder name)
+#    USB example:  cp -r /media/pi/<USB_LABEL>/{name} /home/pi/
+#    scp example:  scp -r {name} pi@<PI_IP>:/home/pi/
 
-# 2. All at once: install every service -> register + enable -> verify -> harden
-cd ~ && bash setup.sh
-#    (do NOT prefix with sudo - sudo is used internally)
+# 2. Enter the folder and run (do NOT prefix with sudo - sudo is used internally)
+cd /home/pi/{name} && bash setup.sh
 ```
 
 `setup.sh` installs every service, registers + enables all units (single daemon-reload), verifies each
@@ -345,6 +350,7 @@ DEVICE_NAME = "{meta["device_id"]}"
 # =============================================================================
 set -euo pipefail
 cd "$(dirname "$0")"
+BASE="$(pwd)"   # actual install path -> injected into the unit path below (no fixed /home/pi/display)
 
 if [ "$(id -u)" -eq 0 ]; then
   echo "[ERROR] Run as the pi user without sudo: bash setup.sh" >&2
@@ -354,8 +360,8 @@ fi
 echo "== [1/4] Install packages + venv =="
 chmod +x install.sh && ./install.sh
 
-echo "== [2/4] Register systemd service =="
-sudo cp systemd/{meta["service"]}.service /etc/systemd/system/
+echo "== [2/4] Register systemd service (path auto-set to this folder) =="
+sed "s#/home/pi/display#${{BASE}}#g" systemd/{meta["service"]}.service | sudo tee /etc/systemd/system/{meta["service"]}.service >/dev/null
 sudo systemctl daemon-reload
 sudo systemctl enable --now {meta["service"]}
 
@@ -380,13 +386,16 @@ Wiring / pinout: open `WIRING.html` in the same folder in a browser (self-contai
 
 ## One-shot install (recommended)
 
-```bash
-# 1. Copy this folder to the Pi
-scp -r {name} pi@<PI_IP>:/home/pi/{src}
+**No fixed path required.** `setup.sh` auto-sets the systemd unit path to wherever this folder
+sits, so copy it as-is (USB or scp) under `/home/pi` and run.
 
-# 2. All at once: install -> register service -> verify -> harden
-cd /home/pi/{src} && bash setup.sh
-#    (do NOT prefix with sudo - sudo is used internally)
+```bash
+# 1. Copy this whole folder under /home/pi (USB or scp; keep the folder name)
+#    USB example:  cp -r /media/pi/<USB_LABEL>/{name} /home/pi/
+#    scp example:  scp -r {name} pi@<PI_IP>:/home/pi/
+
+# 2. Enter the folder and run (do NOT prefix with sudo - sudo is used internally)
+cd /home/pi/{name} && bash setup.sh
 ```
 
 `setup.sh` runs 4 stages automatically and **stops before hardening if the verify (stage 3) fails**