[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/kitty/theme.conf

@@ -0,0 +1,61 @@
+
+# The basic colors
+foreground              #ffffff
+background              #262335
+selection_foreground    #262335
+selection_background    #f97e72
+
+# Cursor colors
+cursor                  #f97e72
+cursor_text_color       #262335
+
+# URL underline color when hovering with mouse
+url_color               #f97e72
+
+# OS Window titlebar colors
+wayland_titlebar_color system
+macos_titlebar_color system
+
+# Colors for marks (marked text in the terminal)
+mark1_foreground #262335
+mark1_background #614D85
+mark2_foreground #262335
+mark2_background #614D85
+mark3_foreground #262335
+mark3_background #614D85
+
+# The 16 terminal colors
+
+# black
+color0 #232530
+# bright-black = dim/secondary text (menus, comments); was #232530 ≈ background so it
+# rendered invisible. Lifted to the theme's muted lavender for legible dim text.
+color8 #848bbd
+
+# red
+color1 #fe4450
+color9 #fe4450
+
+# green
+color2  #72f1b8
+color10 #72f1b8
+
+# yellow
+color3  #ff7edb
+color11 #ff7edb
+
+# blue
+color4  #03edf9
+color12 #03edf9
+
+# magenta
+color5  #fede5d
+color13 #f3e70f
+
+# cyan
+color6  #03edf9
+color14 #03edf9
+
+# white
+color7  #ffffff
+color15 #ffffff