[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.

common/.pi/agent/themes/catppuccin-mocha.json

@@ -0,0 +1,90 @@
+{
+  "$schema": "https://raw.githubusercontent.com/earendil-works/pi/main/packages/coding-agent/src/modes/interactive/theme/theme-schema.json",
+  "name": "catppuccin-mocha",
+  "vars": {
+    "rosewater": "#f5e0dc",
+    "flamingo": "#f2cdcd",
+    "pink": "#f5c2e7",
+    "mauve": "#cba6f7",
+    "red": "#f38ba8",
+    "maroon": "#eba0ac",
+    "peach": "#fab387",
+    "yellow": "#f9e2af",
+    "green": "#a6e3a1",
+    "teal": "#94e2d5",
+    "sky": "#89dceb",
+    "sapphire": "#74c7ec",
+    "blue": "#89b4fa",
+    "lavender": "#b4befe",
+    "fg": "#cdd6f4",
+    "subtext1": "#bac2de",
+    "subtext0": "#a6adc8",
+    "overlay2": "#9399b2",
+    "overlay1": "#7f849c",
+    "overlay0": "#6c7086",
+    "surface2": "#585b70",
+    "surface1": "#45475a",
+    "surface0": "#313244",
+    "base": "#1e1e2e",
+    "mantle": "#181825",
+    "crust": "#11111b"
+  },
+  "colors": {
+    "accent": "mauve",
+    "border": "surface1",
+    "borderAccent": "mauve",
+    "borderMuted": "surface0",
+    "success": "green",
+    "error": "red",
+    "warning": "yellow",
+    "muted": "subtext0",
+    "dim": "overlay0",
+    "text": "fg",
+    "thinkingText": "overlay1",
+    "selectedBg": "surface0",
+    "userMessageBg": "surface0",
+    "userMessageText": "fg",
+    "customMessageBg": "surface0",
+    "customMessageText": "fg",
+    "customMessageLabel": "mauve",
+    "toolPendingBg": "mantle",
+    "toolSuccessBg": "#1e2b22",
+    "toolErrorBg": "#2b1e22",
+    "toolTitle": "mauve",
+    "toolOutput": "fg",
+    "mdHeading": "mauve",
+    "mdLink": "blue",
+    "mdLinkUrl": "sapphire",
+    "mdCode": "green",
+    "mdCodeBlock": "fg",
+    "mdCodeBlockBorder": "surface1",
+    "mdQuote": "subtext0",
+    "mdQuoteBorder": "surface2",
+    "mdHr": "surface1",
+    "mdListBullet": "mauve",
+    "toolDiffAdded": "green",
+    "toolDiffRemoved": "red",
+    "toolDiffContext": "overlay0",
+    "syntaxComment": "overlay0",
+    "syntaxKeyword": "mauve",
+    "syntaxFunction": "blue",
+    "syntaxVariable": "fg",
+    "syntaxString": "green",
+    "syntaxNumber": "peach",
+    "syntaxType": "yellow",
+    "syntaxOperator": "sky",
+    "syntaxPunctuation": "overlay2",
+    "thinkingOff": "surface1",
+    "thinkingMinimal": "overlay0",
+    "thinkingLow": "blue",
+    "thinkingMedium": "teal",
+    "thinkingHigh": "peach",
+    "thinkingXhigh": "red",
+    "bashMode": "peach"
+  },
+  "export": {
+    "pageBg": "#11111b",
+    "cardBg": "#1e1e2e",
+    "infoBg": "#313244"
+  }
+}