Session overhaul: dev tooling, cleanup, theming, fixes

Tooling:
- nh + nvd/nom/statix/deadnix/comma (new programs/nix.nix); GC via nh clean
- zoxide (cd), atuin, just, lazydocker, dust, duf, difftastic (git dft)

Structure:
- rename desktop -> konishi; homeConfigurations -> "user@host" for nh autodetect

Removals (heavy/unused):
- android-studio, unity/.NET/omnisharp/vscode, kicad, zoom, calibre,
  google-fonts, nerd-dictation

Screen recording:
- kooha + vokoscreen-ng + `webcam` corner-cam command/window-rule

Fixes:
- WEBKIT_DISABLE_DMABUF_RENDERER moved to common (electron/tauri on intel)
- kitty pinned to Catppuccin-Mocha; darkman no longer toggles kitty/claude
- claude theme dark + statusline locale fix
- ssh: migrate to settings API + multiplexing/keepalive/AddKeysToAgent;
  gpg-agent enableSshSupport
- silence hyprland configType / gtk4 / xdg userDirs deprecations

Flake hygiene:
- follows=nixpkgs for foundry/hardware/rose-pine/zen/spicetify (10->5 nixpkgs)
- zoxide _ZO_DOCTOR=0

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

home/common/programs/claude/settings.json

@@ -39,6 +39,9 @@
     "type": "command",
     "command": "~/.claude/statusline.sh"
   },
+  "enabledPlugins": {
+    "typescript-lsp@claude-plugins-official": true
+  },
   "extraKnownMarketplaces": {
     "impeccable": {
       "source": {
@@ -77,7 +80,5 @@
       "url": "https://ha-mcp.n62.casa/mcp"
     }
   },
-  "enabledPlugins": {
-    "typescript-lsp@claude-plugins-official": true
-  }
+  "tui": "fullscreen"
 }