feat: Hermit 1.1.0 — HERMIT_* env, Tauri desktop shell

Wire hermit_getenv across the engine, rebrand WebUI/systemd/docs, and
add apps/desktop (Tauri 2 + React) with a DeepSeek-Harness-like UI.
Qt app/ is frozen; full libcstcore FFI is scaffolded behind --features engine.

Co-authored-by: Cursor <cursoragent@cursor.com>

default.nix

@@ -1,13 +1,8 @@
-# NixOS and other nix users: the desktop front end (Qt Quick) with the engine
-# it embeds, built and installed the nix way.
+# NixOS and other nix users: legacy Qt Quick front end (frozen; Tauri app is
+# apps/desktop). CLI remains scripts/bootstrap_linux.sh.
 #
-#   nix-build                  # ./result/bin/cst-agent-app, run it in place
-#   nix-env -f . -i cst-agent  # into the user profile: PATH, menu entry, icon
-#
-# The Qt apps hook is what makes the installed binary find Qt's plugins and
-# QML modules outside a nix-shell (this is also what keeps them out of
-# nix-collect-garbage's reach). Only the window is installed: the CLI has its
-# own installer, scripts/bootstrap_linux.sh.
+#   nix-build                  # ./result/bin/hermit-app (Qt, transitional)
+#   nix-env -f . -i hermit
 { pkgs ? import <nixpkgs> { } }:
 
 let
@@ -21,7 +16,7 @@ let
     builtins.head (builtins.match "#define ${re} ([0-9]+)" hit);
 in
 pkgs.stdenv.mkDerivation {
-  pname = "cst-agent";
+  pname = "hermit";
   version =
     "${vLine "CST_VERSION_MAJOR"}.${vLine "CST_VERSION_MINOR"}.${vLine "CST_VERSION_PATCH"}";
 
@@ -91,8 +86,8 @@ pkgs.stdenv.mkDerivation {
 
   meta = {
     description =
-      "Local coding agent: Qt Quick front end with the engine in-process";
-    homepage = "https://git.whcself.xyz/WHC/CST-agent";
+      "Hermit: local coding agent (legacy Qt Quick front end; prefer apps/desktop)";
+    homepage = "https://git.whcself.xyz/WHC/Hermit";
     platforms = pkgs.lib.platforms.linux;
     mainProgram = "cst-agent-app";
   };