refactor: reorganize, add package (opencode, osgrep, beads), add ai agent shell

modules/home/shell/tmux.nix

@@ -0,0 +1,34 @@
+{ config, lib, pkgs, ... }: {
+  programs.tmux = {
+    enable = lib.mkDefault true;
+    clock24 = true;
+    historyLimit = 20000;
+    mouse = true;
+    baseIndex = 1;
+    prefix = "C-a";
+    escapeTime = 0;
+    aggressiveResize = true;
+    plugins = [{ plugin = pkgs.tmuxPlugins.gruvbox; }];
+    extraConfig = ''
+      # Terminal configuration for proper colors and features
+      set-option -g default-terminal "screen-256color"
+      set-option -ga terminal-overrides ",*256col*:Tc"
+      set-option -g focus-events on
+      # Avoid CSI-u newline remapping that breaks Neovim pastes
+      set -as terminal-features 'xterm-ghostty:bpaste,clipboard,RGB'
+      set -g status-interval 5
+        setw -g automatic-rename on
+        set -g renumber-windows on
+        bind r source-file ~/.tmux.conf \; display-message "tmux reloaded"
+        bind | split-window -h
+      bind - split-window -v
+      unbind '"'
+      unbind %
+      set -g display-panes-time 1500
+      bind k send-keys -R \; send-keys C-l \; clear-history
+      # Ensure tmux panes spawn login nu so Starship integration runs
+      set -g default-shell "${config.home.profileDirectory}/bin/nu"
+      set -g default-command "${config.home.profileDirectory}/bin/nu --login"
+    '';
+  };
+}