feat(hook): write marked profile blocks and register zsh completion

`netssh hook install` and the setup wizard now write the same marked
`# >>> netssh >>>` block as install.sh and replace unmarked entries of
older versions instead of appending duplicates. Uninstall shares the
legacy patterns with the installer (eval/alias/source variants).

For zsh the block adds ~/.zfunc to fpath and calls compdef, so
completion also works when compinit already ran earlier in .zshrc,
e.g. with oh-my-zsh. The installer reports which completion it set up
per shell and how to reset ~/.zcompdump.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

install.sh

@@ -168,6 +168,11 @@ plan_profile() {
         printf '%s shell-init\n' "$(quote_sh "$INSTALL_DIR/$BINARY")"
         printf '[ ! -f %s ] || . %s\n' "$(quote_sh "$CACHE_DIR/netssh/aliases.sh")" "$(quote_sh "$CACHE_DIR/netssh/aliases.sh")"
       fi
+      if [[ "$kind" == zsh ]]; then
+        # Register completion also when compinit already ran (e.g. oh-my-zsh).
+        printf 'fpath=(%s $fpath)\n' "$(quote_sh "$HOME/.zfunc")"
+        printf 'if (( $+functions[compdef] )); then autoload -Uz _netssh && compdef _netssh netssh; fi\n'
+      fi
       printf '# <<< netssh <<<\n'
     } >> "$data"
   fi
@@ -231,10 +236,25 @@ for ((index=0; index<${#PROFILE_PATHS[@]}; index++)); do
   mv -f "$staged" "$target"
   info "updated  : ${PROFILE_PATHS[$index]}"
 done
+COMPLETIONS=()
 for kind in "${SHELLS[@]}"; do
-  if ! "$INSTALL_DIR/$BINARY" completion install --shell "$kind"; then
+  if "$INSTALL_DIR/$BINARY" completion install --shell "$kind" >/dev/null; then
+    COMPLETIONS+=("$kind")
+  else
     info "warning: could not update $kind completion"
   fi
 done
 printf '\nnetssh %s installed / updated at %s/%s\n' "$TAG" "$INSTALL_DIR" "$BINARY"
+for kind in "${COMPLETIONS[@]}"; do
+  case "$kind" in
+    bash) info "completion: bash -> $HOME/.local/share/bash-completion/completions/netssh" ;;
+    zsh) info "completion: zsh  -> $HOME/.zfunc/_netssh (registered in ${ZSH_DIR}/.zshrc)" ;;
+    fish) info "completion: fish -> $CONFIG_DIR/fish/completions/netssh.fish" ;;
+  esac
+done
 info "Open a new terminal to load the current hooks and aliases."
+for kind in "${COMPLETIONS[@]}"; do
+  if [[ "$kind" == zsh ]]; then
+    info "zsh: if <Tab> still shows files, run: rm -f $(quote_sh "$ZSH_DIR")/.zcompdump* && exec zsh"
+  fi
+done