[Sync] Pi chat mode + plan-mode rework, fastfetch icons, Claude statusline, fl KDE shortcuts

Re-export of the private tree at b5580f8 (2026-11-11).

- pi: new chat-mode extension, plan-mode rework, README and settings
  updates, version bump
- fastfetch: Packages/Display/WM/GPU/Memory key icons moved off the legacy
  Nerd Fonts v2 Material range (blank on v3 fonts) to Font Awesome glyphs
- claude: statusline runs git with --no-optional-locks, model default,
  pr-loop skill note, gh sync fix
- fl: kglobalshortcutsrc update

common/.config/claude/settings.json

@@ -87,7 +87,6 @@
     ],
     "defaultMode": "auto"
   },
-  "model": "opus",
   "hooks": {
     "SessionStart": [
       {