pinwheel: Add ct for side threads in Claude Code sessions

Install ct from its flake, with its config, a tmux menu on prefix T and a user service for the web UI. Also keep Claude Code transcripts for ten years instead of 30 days, since threads are meant to be revisited.

flake.nix

@@ -116,6 +116,12 @@
       # url = "git+file:///home/alex/code/own/dagbok?ref=main";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    ct = {
+      url = "git+file:///home/alex/code/own/ct?ref=main";
+      # url = "git+ssh://gitea@git.ppp.pm:1122/alex/ct.git?ref=main";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =