Varaverk: arrange mode, folder management, rsync standalone, layout fixes

Scheduler UI:
- Arrange mode: drag scripts between orchs and reorder within arrays; right
  panel shows unassigned script pool; Save Arrangement commits to master.conf
- + Folder: named collapsible subfolders for Custom Scripts stored in schedule.json
- Rsync children: hide Run/Dry Run/Log/location when orch is ON; show standalone
  location + cron controls when orch is OFF; cron only fires when both filled
- Non-conf-managed children (transcode): toggles now show enabled when orch is on
- Right panel height sync: fix ResizeObserver feedback loop via align-self:flex-start
  on left panel and left.offsetHeight in vvFitRight
- How do I use this: updated to cover arrange, folders, rsync standalone, transcode

New API endpoints:
- board.php, clearlock.php, movescript.php, rawconf.php, readscript.php
- reorderarray.php, rsync_standalone.php, savefolders.php

run.php / dryrun.php: accept optional --location= arg for standalone rsync calls

user_script_plug-in.sh

@@ -16,7 +16,7 @@
 #
 #   array_started.sh                    at array start — launches ALL startup scripts in order
 #   array_stopping.sh                 at array stop  — graceful shutdown sequence
-#   watchdog_orchestrator.sh          every minute   — resource + docker + system watchdog
+#   watchdog_orchestrator.sh          every 15 min   — resource + docker + system watchdog
 #   transcode_management.sh           every 7 min   — cleanup then manager (order critical)
 #   critical_sync_maintenance.sh      every 30 min  — auth + Emby dirty sync + partnership
 #   intermediate_sync_maintenance.sh  every 4 hours — arr library sync + artwork fetch
@@ -132,7 +132,7 @@
 #   fallback.sh               [continuous] mutual fallback state machine
 #
 # NOTE: system_watchdog.sh and docker_watchdog.sh are no longer started by array_started.sh.
-# They are now single-pass scripts called every minute by watchdog_orchestrator.sh (see below).
+# They are now single-pass scripts called every 15 minutes by watchdog_orchestrator.sh (see below).
 # Remove them from ARRAY_START_SCRIPTS in master.conf if present.
 #
 # bash /mnt/user/appdata/unraid_scripts/Orchestrators/array_started.sh
@@ -161,7 +161,7 @@
 
 
 # ── WATCHDOG ORCHESTRATOR ─────────────────────────────────────────────────────────────────────
-# Schedule:   * * * * *  (every minute)
+# Schedule:   */15 * * * *  (every 15 minutes)
 # Background: YES
 #
 # Runs the three-layer watchdog system in the correct sequence each cycle. Replaces the
@@ -178,9 +178,9 @@
 #   4. stability_watchdog.sh  reboot if all else failed — last line of defense
 #
 # Startup grace: no action until uptime >= WATCHDOG_STARTUP_GRACE (600s). Exits early
-# so all three sub-scripts don't each log startup-grace skips on every minute.
+# so all three sub-scripts don't each log startup-grace skips on every cycle.
 # Overlap protection: acquire_lock() exits immediately if a prior cycle is still running —
-# prevents pile-up when a restart attempt or daemon check takes longer than 60 seconds.
+# prevents pile-up when a restart attempt or daemon check takes longer than 15 minutes.
 #
 # bash /mnt/user/appdata/unraid_scripts/Orchestrators/watchdog_orchestrator.sh
 # bash /mnt/user/appdata/unraid_scripts/Orchestrators/watchdog_orchestrator.sh --dry-run
@@ -560,7 +560,7 @@
 # ──────────────────────────────────────────────────────────────────────────────────────────────
 
 # docker_watchdog.sh — two-tier container self-healing monitor (single-pass)
-# Called every minute by watchdog_orchestrator.sh — NOT started by array_started.sh. Single-pass.
+# Called every 15 minutes by watchdog_orchestrator.sh — NOT started by array_started.sh. Single-pass.
 #
 # Tier 1 — explicit per-container (configured in host*.conf):
 #   Memory hard limits:  immediate restart when exceeded — no strikes, no waiting
@@ -814,7 +814,7 @@
 # bash /mnt/user/appdata/unraid_scripts/unRAID_Essentials/docker_syslog_filter.sh
 
 # webgui_watchdog.sh — WebGUI availability watchdog (called by system_watchdog via SYSTEM_WATCHDOG_SCRIPTS)
-# Not scheduled directly — runs as part of the every-minute watchdog chain.
+# Not scheduled directly — runs as part of the every-15-minute watchdog chain.
 # Escalation: nginx → php-fpm → emhttp, each with recheck before proceeding to next level.
 # bash /mnt/user/appdata/unraid_scripts/Watchdogs/System/webgui_watchdog.sh --dry-run
 # bash /mnt/user/appdata/unraid_scripts/Watchdogs/System/webgui_watchdog.sh --status
@@ -1414,7 +1414,7 @@
 # At Stopping of Array:
 #   Orchestrators/array_stopping.sh                            (single entry — graceful shutdown)
 #
-# * * * * *      every minute:
+# */15 * * * *   every 15 minutes:
 #   Orchestrators/watchdog_orchestrator.sh
 #     └─ resource_watchdog → docker_watchdog → system_watchdog (storage/webgui/network) → stability_watchdog
 #