[Sync] replace the flat layout with the unified stow tree

Supersedes the old flat .config/ layout (last published 2026-06-28) with the
private repo's structure: one shared base plus per-host overlays.

- packages: common/ gui/ lw/ fl/ wm/ plus install.sh and bin/ tooling
  (dotsync, reconcile-hyde.sh)
- new README covering the layout, deploy order and the HyDE dependency
- current HyDE waybar rig (layouts/, cava), pi agent extensions, claude/
  config, tmux, presenterm, aichat roles
- fish: kp (keepassxc-cli + fzf picker, db path from $KP_DB) and
  bind_M_n_history (alt+1..9 recalls the nth history entry)
- drops cruft that should never have been tracked: the duplicate top-level
  .pi/ copy, btop.log, zellij config.kdl.bak, fish_variables
- .pi/agent/auth.json is gitignored; auth.json.example ships instead

Host-specific work sessions and the personal backlog stay in the private
tree. Endpoint locators in the llamacpp/whisper guides are placeholders
($SERVER, <own-domain>) — the guides themselves stay, since they are the
useful part.

gui/.config/hypr/hypridle.conf

@@ -0,0 +1,50 @@
+#!      ░▒▒▒░░░▓▓           ___________
+#!    ░░▒▒▒░░░░░▓▓        //___________/
+#!   ░░▒▒▒░░░░░▓▓     _   _ _    _ _____
+#!   ░░▒▒░░░░░▓▓▓▓▓▓ | | | | |  | |  __/
+#!    ░▒▒░░░░▓▓   ▓▓ | |_| | |_/ /| |___
+#!     ░▒▒░░▓▓   ▓▓   \__  |____/ |____/
+#!       ░▒▓▓   ▓▓  //____/
+
+# $LOCKSCREEN = hyprlock # preferred LOCKSCREEN e.g swaylock
+$LOCKSCREEN = lockscreen.sh # Calls $LOCKSCREEN set from hyprland
+
+general {
+    lock_cmd = $LOCKSCREEN
+    unlock_cmd = #notify-send "unlock!"      # same as above, but unlock
+    before_sleep_cmd = $LOCKSCREEN    # command ran before sleep
+    after_sleep_cmd = # notify-send "Awake!"  # command ran after sleep
+    ignore_dbus_inhibit = 0
+}
+
+# Dims the display
+listener {
+    timeout = 120
+on-timeout = { brightnessctl -s && brightnessctl s 1% ;}
+    on-resume = brightnessctl -r
+}
+
+# Lock it first before dpms off so that screen won't show for a moment after wake up.
+listener {
+    timeout = 240
+    on-timeout = $LOCKSCREEN
+}
+
+# DPMS off
+listener {
+    timeout = 2300
+    on-timeout = hyprctl dispatch dpms off #do not turn off display while media is playing
+    on-resume = hyprctl dispatch dpms on
+}
+
+# Suspend
+# listener {
+#     timeout = 500
+#    on-timeout = systemctl suspend
+# }
+
+# hyprlang noerror true
+# Source anything  from this path if you want to add your own listener
+# source command actually do not exist yet
+source = ~/.config/hypridle/*
+# hyprlang noerror false