docs: remove standalone eval references, use source pattern everywhere

Update all remaining docs, error messages, and hints to point to
the source pattern or `git gtr help init` instead of bare eval.
Doctor detection also matches source-pattern users (gtr/init- in rc).

Author: helizaga

CLAUDE.md

@@ -112,7 +112,7 @@ cmd_editor() → resolve_target() → load_editor_adapter() → editor_open()
 
 **`.gtrconfig`**: Team-shared config using gitconfig syntax, parsed via `git config -f`. Keys map differently from git config (e.g., `gtr.copy.include` → `copy.include`, `gtr.hook.postCreate` → `hooks.postCreate`). See the .gtrconfig Key Mapping table in README or `docs/configuration.md`.
 
-**`init` command**: Outputs shell functions for `gtr cd <branch>` navigation. Output is cached to `~/.cache/gtr/` and auto-invalidates on version change. Users add `eval "$(git gtr init bash)"` to their shell rc file, or source the cache file directly for faster startup.
+**`init` command**: Outputs shell functions for `gtr cd <branch>` navigation. Output is cached to `~/.cache/gtr/` and auto-invalidates on version change. Users source the cache file directly in their shell rc for fast startup (see `git gtr help init`).
 
 **`clean --merged`**: Removes worktrees whose PRs/MRs are merged. Auto-detects GitHub (`gh`) or GitLab (`glab`) from the `origin` remote URL. Override with `gtr.provider` config for self-hosted instances.
 

bin/git-gtr

@@ -110,8 +110,8 @@ main() {
       local _shell_name
       _shell_name="$(basename "${SHELL:-bash}")"
       log_error "'cd' requires shell integration (subprocesses cannot change your shell's directory)"
-      log_info "Set up with: eval \"\$(git gtr init $_shell_name)\"  (output is cached for fast startup)"
-      log_info "Then use:    gtr cd [<branch>]"
+      log_info "Run 'git gtr help init' for setup instructions"
+      log_info "Then use: gtr cd [<branch>]"
       exit 1
       ;;
     *)

lib/commands/doctor.sh

@@ -128,16 +128,10 @@ cmd_doctor() {
     fish) _rc_file="$HOME/.config/fish/config.fish" ;;
     *)    _rc_file="" ;;
   esac
-  if [ -n "$_rc_file" ] && [ -f "$_rc_file" ] && grep -q 'git gtr init' "$_rc_file" 2>/dev/null; then
+  if [ -n "$_rc_file" ] && [ -f "$_rc_file" ] && grep -qE 'git gtr init|gtr/init-' "$_rc_file" 2>/dev/null; then
     echo "[OK] Shell integration: loaded (gtr cd available)"
   elif [ -n "$_rc_file" ]; then
-    local _init_hint
-    if [ "$_shell_name" = "fish" ]; then
-      _init_hint="git gtr init fish | source"
-    else
-      _init_hint="eval \"\$(git gtr init $_shell_name)\""
-    fi
-    echo "[i] Shell integration: $_init_hint in ${_rc_file##*/} for gtr cd"
+    echo "[i] Shell integration: run 'git gtr help init' for setup instructions"
   fi
 
   echo ""

lib/commands/help.sh

@@ -102,8 +102,8 @@ Usage: git gtr go <branch>
 
 Prints the absolute path to the specified worktree. Useful for navigation
 with cd or for scripting. For direct cd support, use shell integration:
-  eval "$(git gtr init bash)"    # then: gtr cd <branch>
-  (output is cached automatically for fast startup)
+  git gtr help init              # see setup instructions
+  gtr cd <branch>                # then navigate directly
 
 Special:
   Use '1' for the main repo root: git gtr go 1

lib/commands/init.sh

@@ -90,10 +90,8 @@ cmd_init() {
 
 _init_bash() {
   cat <<'BASH'
-# git-gtr shell integration (output is cached to ~/.cache/gtr/)
-# Add to ~/.bashrc:
-#   eval "$(git gtr init bash)"
-# Faster: source the cache file directly (see git gtr help init)
+# git-gtr shell integration (cached to ~/.cache/gtr/)
+# Setup: see git gtr help init
 
 __FUNC__() {
   if [ "$#" -gt 0 ] && [ "$1" = "cd" ]; then
@@ -196,10 +194,8 @@ BASH
 
 _init_zsh() {
   cat <<'ZSH'
-# git-gtr shell integration (output is cached to ~/.cache/gtr/)
-# Add to ~/.zshrc:
-#   eval "$(git gtr init zsh)"
-# Faster: source the cache file directly (see git gtr help init)
+# git-gtr shell integration (cached to ~/.cache/gtr/)
+# Setup: see git gtr help init
 
 __FUNC__() {
   emulate -L zsh