[Sync] adopt unified stow layout from the private repo

Mirrors the private dots tree at 900bdda: one shared base plus per-host
overlays, replacing the old flat .config/ layout (last synced 2026-06-28).

- packages: common/ gui/ wm/ lw/ fl/ + install.sh and bin/ tooling (dotsync,
  reconcile-hyde.sh)
- new README (layout, deploy order, HyDE dependency), plus ToDo.md and
  HYDE-UPDATE.md
- current HyDE waybar rig (layouts/, cava), pi agent extensions, claude/
  config, tmux, presenterm, aichat roles
- drops stale duplicates and generated cruft that should never have been
  tracked: the second top-level .pi/ copy, btop.log, zellij config.kdl.bak,
  fish_variables, nvim codecompanion.lua
- .pi/agent/auth.json is gitignored now; auth.json.example ships instead
- fl/ and wm/ hypr themes/ stay untracked (HyDE-generated per machine, per
  the root .gitignore)

wm/.config/hypr/monitors.conf

@@ -0,0 +1,53 @@
+
+# █▀▄▀█ █▀█ █▄░█ █ ▀█▀ █▀█ █▀█ █▀
+# █░▀░█ █▄█ █░▀█ █ ░█░ █▄█ █▀▄ ▄█
+
+# Set your monitor configuration here
+# See https://wiki.hyprland.org/Configuring/Monitors/
+# For a sample file, please refer to https://github.com/prasanthrangan/hyprdots/blob/main/Configs/.config/hypr/monitors.t2
+
+$mainScreen = DP-2
+$leftScreen = eDP-1 # FIXME: eDP is a laptop panel (leftover from lw) — set the real connector when wm's third monitor exists; harmless meanwhile
+$rightScreen = HDMI-A-1
+
+monitor = $mainScreen, 3840x2160@60.00, 0x0, 1.25 # main screen
+monitor = $rightScreen, 1920x1080@60, 3072x350, 1 # right
+
+# monitor = $mainScreen, 1920x1080@59.99, 0x0, 2 # main screen
+# monitor = $leftScreen, 1920x1080@60, -1920x0, 1 # left 
+
+#Main Monitor
+workspace = 1, monitor:$mainScreen, default:true
+workspace = 2, monitor:$mainScreen
+workspace = 3, monitor:$mainScreen
+workspace = 4, monitor:$mainScreen
+workspace = 5, monitor:$mainScreen
+workspace = 6, monitor:$mainScreen
+workspace = 7, monitor:$mainScreen
+workspace = 8, monitor:$mainScreen
+workspace = 9, monitor:$mainScreen
+workspace = 10,monitor:$mainScreen
+
+# Second Monitor
+workspace = 11, monitor:$rightScreen, default:true
+workspace = 12, monitor:$rightScreen
+workspace = 13, monitor:$rightScreen
+workspace = 14, monitor:$rightScreen
+workspace = 15, monitor:$rightScreen
+workspace = 16, monitor:$rightScreen
+workspace = 17, monitor:$rightScreen
+workspace = 18, monitor:$rightScreen
+workspace = 19, monitor:$rightScreen
+workspace = 20, monitor:$rightScreen
+
+# Third Monitor
+workspace = 21, monitor:$leftScreen, default:true
+workspace = 22, monitor:$leftScreen
+workspace = 23, monitor:$leftScreen
+workspace = 24, monitor:$leftScreen
+workspace = 25, monitor:$leftScreen
+workspace = 26, monitor:$leftScreen
+workspace = 27, monitor:$leftScreen
+workspace = 28, monitor:$leftScreen
+workspace = 29, monitor:$leftScreen
+workspace = 30, monitor:$leftScreen