Add AI test, doctor, and interactive setup wizard

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

bin/omarchy-cn-ai-doctor

@@ -0,0 +1,47 @@
+#!/bin/bash
+# omarchy:summary=Check AI harness installation, credentials, and endpoint health
+# omarchy:examples=omarchycn ai doctor
+
+set -euo pipefail
+
+source "$OMARCHY_PATH/cn/lib/ai.sh"
+
+failures=0
+
+profile=$(cn_ai_current_profile 2>/dev/null || true)
+if [[ -z $profile ]]; then
+  echo "INFO ai: 未设置默认 Profile (omarchycn ai profile use <name>)"
+  exit 0
+fi
+echo "INFO ai: current profile $profile"
+
+harness=$(cn_ai_profile_field "$profile" harness)
+provider=$(cn_ai_profile_field "$profile" provider)
+command=$(cn_ai_harness_field "$harness" command)
+proto=$(cn_ai_harness_field "$harness" protocol)
+
+if command -v "$command" > /dev/null 2>&1; then
+  echo "PASS ai: harness $harness installed ($command)"
+else
+  echo "WARN ai: harness $harness 未安装，首次 launch 时自动安装"
+fi
+
+if omarchy-cn-ai-secret get "$provider" > /dev/null 2>&1; then
+  echo "PASS ai: $provider API Key stored"
+else
+  echo "FAIL ai: $provider API Key 未存储 (omarchycn ai secret set $provider)"
+  failures=$((failures + 1))
+fi
+
+if [[ $proto != "native" ]]; then
+  base=$(cn_ai_endpoint "$provider" "$proto")
+  host=$(sed -E 's|https?://([^/]+).*|\1|' <<<"$base")
+  if getent hosts "$host" > /dev/null 2>&1; then
+    echo "PASS ai: endpoint DNS resolves ($host)"
+  else
+    echo "FAIL ai: endpoint DNS 无法解析 ($host)"
+    failures=$((failures + 1))
+  fi
+fi
+
+exit $((failures > 0 ? 1 : 0))