fix(ai-kimi): add source fallback, simplify reauth, check claude presence

- source helpers with 2>/dev/null || true and quoted /home/nikitenko path
- remove redundant reauth flag and extra prompt
- check that claude is installed before exec
- apply same source fix to ai-deepseek for consistency

ai-setup.sh

@@ -479,7 +479,7 @@ chmod +x "$BIN_DIR/ai-gpt"
 # === ai-deepseek ===
 cat > "$BIN_DIR/ai-deepseek" << 'DEEPSEEKEOF'
 #!/usr/bin/env bash
-source ~/.local/bin/ai-api-helpers.sh
+source "$HOME/.local/bin/ai-api-helpers.sh" 2>/dev/null || true
 
 key_file="$HOME/.config/ai-setup/deepseek_key"
 api_key=""
@@ -550,11 +550,10 @@ chmod +x "$BIN_DIR/ai-deepseek"
 cat > "$BIN_DIR/ai-kimi" << 'KIMIEOF'
 #!/usr/bin/env bash
 # ai-kimi - запуск Claude Code через официальный Kimi Code API
-source ~/.local/bin/ai-api-helpers.sh
+source "$HOME/.local/bin/ai-api-helpers.sh" 2>/dev/null || true
 
 key_file="$HOME/.config/ai-setup/kimi_key"
 api_key=""
-reauth=0
 
 [ -f "$key_file" ] && api_key=$(cat "$key_file")
 
@@ -566,7 +565,6 @@ if [ -n "$api_key" ]; then
   if [ $ret -eq 401 ]; then
     rm -f "$key_file"
     api_key=""
-    reauth=1
   elif [ $ret -eq 429 ]; then
     echo -n "Продолжить всё равно? (запросы могут не проходить) [y/N] "
     read -r _ans; case "${_ans:-N}" in [Yy]*) ;; *) exit 1 ;; esac
@@ -575,11 +573,6 @@ if [ -n "$api_key" ]; then
   fi
 fi
 
-if [ -z "$api_key" ] && [ "$reauth" -eq 1 ]; then
-  echo -n "Хотите ввести новый Kimi ключ? [Y/n] "
-  read -r _ans; case "${_ans:-Y}" in [Yy]*) ;; *) exit 1 ;; esac
-fi
-
 if [ -z "$api_key" ]; then
   echo "Получить ключ: https://www.kimi.com/code"
   read -r -p "Введите ваш Kimi API ключ: " api_key
@@ -604,6 +597,12 @@ if [ -z "$api_key" ]; then
   fi
 fi
 
+if ! command -v claude &>/dev/null; then
+  echo "Ошибка: Claude Code не найден. Установите через npm:"
+  echo "  npm install -g @anthropic-ai/claude-code"
+  exit 1
+fi
+
 SYS_PROMPT=$(_build_ai_sys_prompt)
 ANTHROPIC_BASE_URL=https://api.kimi.com/coding \
 ANTHROPIC_AUTH_TOKEN="$api_key" \