terra: desktop setup, flatpak, unstable packages, key management

- Hyprland workspace rules: start-communications.sh launches telegram +
  discord into special:communications; qbz/discord/telegram switched to
  flatpak (nix-flatpak, Flathub) — removes qbz and proton-pass-cli flake
  inputs
- proton-pass-cli and claude-code sourced from nixpkgs-unstable; unstable
  pkgs set threaded into home-manager via extraSpecialArgs
- GTK/libadwaita dark theme fixed: dconf color-scheme = prefer-dark written
  declaratively instead of a per-session gsettings call
- scripts/keys: store/restore SSH host keys and sops age keys via Proton
  Pass (ssh_host#<config> / age#<config> / age#admin naming)

flake.lock

@@ -118,6 +118,24 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -332,6 +350,22 @@
         "type": "github"
       }
     },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1775888245,
+        "narHash": "sha256-nwASzrRDD1JBEu/o8ekKYEXm/oJW6EMCzCRdrwcLe90=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "13043924aaa7375ce482ebe2494338e058282925",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "proton-pass-cli": {
       "inputs": {
         "nixpkgs": [
@@ -452,6 +486,25 @@
         "type": "github"
       }
     },
+    "qbz": {
+      "inputs": {
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1784877312,
+        "narHash": "sha256-eQ4xvBKnQp4C5lEVukx/75umFFmWyCjbuO82qyFDw14=",
+        "owner": "vicrodh",
+        "repo": "qbz",
+        "rev": "c4cc755fd02d999084883e864c0697139a8b8648",
+        "type": "github"
+      },
+      "original": {
+        "owner": "vicrodh",
+        "repo": "qbz",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "authentik-nix": "authentik-nix",
@@ -463,6 +516,7 @@
         "nixpkgs": "nixpkgs_2",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "proton-pass-cli": "proton-pass-cli",
+        "qbz": "qbz",
         "sops-nix": "sops-nix"
       }
     },
@@ -501,6 +555,21 @@
         "type": "github"
       }
     },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
     "treefmt-nix": {
       "inputs": {
         "nixpkgs": [