[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/host.conf

@@ -0,0 +1,2 @@
+# Per-host kitty overrides. Empty by default — a host overlay (e.g. lw/) replaces this file
+# to tweak font_size/padding/opacity for that machine. kitty.conf includes it LAST.

gui/.config/kitty/kitty.conf

@@ -0,0 +1,21 @@
+include theme.conf
+
+font_size 12.0
+font_family      CaskaydiaCove Nerd Font Mono
+bold_font        auto
+italic_font      auto
+bold_italic_font auto
+window_padding_width 25
+enable_audio_bell no
+cursor_trail 1
+cursor_blink_interval 0.4 ease-in-out
+
+tab_bar_style       powerline
+tab_powerline_style slanted
+
+confirm_os_window_close 0
+#background_opacity 0.60
+#hide_window_decorations yes
+
+# Per-host overrides (font_size, padding, opacity…) — included last so it wins.
+include host.conf

gui/.config/kitty/music.conf

@@ -0,0 +1,20 @@
+# run with `kitty --session ~/.config/kitty/music.conf`
+
+# os_window_size 220c 64c
+# create a new tab
+new_tab music
+layout splits
+
+# set the working directory for windows in the current tab
+cd ~
+
+# Splits are sized with --bias (a percentage of the space being split) rather
+# than `resize_window taller/wider N`: that takes N *cells*, so on a small window
+# N swamps the available space and the other pane collapses to nothing -- cava
+# was disappearing. --bias keeps the same proportions at any window size.
+# Tune: --bias here is the share the *new* pane takes; cava gets the remainder.
+launch --var window=first cava
+# create additional terminals
+launch --location=hsplit --bias 80 pyradio
+focus
+launch --location=vsplit --bias 65 pipes-rs

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