Add claude config and rework bash dotfile management

- Add claude stow package (settings.json, statusline-command.sh)
- Replace .bashrc stow with source-injection approach to avoid conflicts
  with tools like oh-my-bash that want to own ~/.bashrc
- Move all bash customizations into .bashrc.omb, sourced conditionally
- setup.sh now checks for existing source lines before appending

claude/.claude/settings.json

@@ -0,0 +1,12 @@
+{
+  "attribution": {
+    "commit": "",
+    "pr": ""
+  },
+  "model": "sonnet",
+  "alwaysThinkingEnabled": true,
+  "statusLine": {
+    "type": "command",
+    "command": "bash ~/.claude/statusline-command.sh"
+  }
+}

claude/.claude/statusline-command.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+input=$(cat)
+cwd=$(echo "$input" | jq -r '.workspace.current_dir // .cwd')
+chroot_part=""
+if [ -n "${debian_chroot:-}" ]; then
+  chroot_part="(${debian_chroot})"
+fi
+printf "${chroot_part}\033[01;32m$(whoami)@$(hostname -s)\033[00m:\033[01;34m${cwd}\033[00m"

setup.sh

@@ -34,6 +34,13 @@ ensure_sourced() {
 # ssh — always available
 stow_pkg ssh
 
+# claude
+if [ -d "$HOME/.claude" ]; then
+    stow_pkg claude
+else
+    echo "SKIP: claude (~/.claude not found)"
+fi
+
 # bash — stow dotfiles, then ensure ~/.bashrc sources them
 stow_pkg bash
 ensure_sourced "$HOME/.bashrc.omb"