런처 Agent Compare 기능 1차 이식 및 현재 런처 구조 연결

- Agent Compare 기준으로 런처 빠른 실행 칩, 검색 히스토리 탐색, 선택 항목 미리보기 패널을 현재 런처에 이식
- 하단 위젯 바, QuickLook(F3), 화면 OCR(F4), 관련 서비스/partial 파일을 현재 LauncherWindow/LauncherViewModel 구조에 연결
- UsageRankingService 상위 항목 조회와 SearchHistoryService를 추가해 실행 상위 경로/검색 기록이 실제 런처 동작에 반영되도록 정리
- README.md, docs/DEVELOPMENT.md에 이식 범위와 검증 결과를 2026-04-05 11:58 (KST) 기준으로 기록

검증 결과
- dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\\verify\\ -p:IntermediateOutputPath=obj\\verify\\ 경고 0 / 오류 0

src/AxCopilot/Services/ServerStatusService.cs

@@ -0,0 +1,115 @@
+using System.Net.Http;
+using AxCopilot.Models;
+
+namespace AxCopilot.Services;
+
+internal sealed class ServerStatusService
+{
+    public static readonly ServerStatusService Instance = new();
+
+    private static readonly HttpClient Http = new()
+    {
+        Timeout = TimeSpan.FromMilliseconds(1500)
+    };
+
+    public bool OllamaOnline { get; private set; }
+    public bool LlmOnline { get; private set; }
+    public bool McpOnline { get; private set; }
+    public string McpName { get; private set; } = "MCP";
+
+    public event EventHandler? StatusChanged;
+
+    private System.Threading.Timer? _timer;
+    private string _ollamaEndpoint = "http://localhost:11434";
+    private string _llmEndpoint = "";
+    private string _llmService = "Ollama";
+    private string _mcpEndpoint = "";
+
+    private ServerStatusService() { }
+
+    public void Start(AppSettings? settings = null)
+    {
+        LoadEndpoints(settings);
+        if (_timer != null)
+            return;
+
+        _timer = new System.Threading.Timer(async _ => await CheckAllAsync(), null, 0, 15000);
+    }
+
+    public void Stop()
+    {
+        _timer?.Dispose();
+        _timer = null;
+    }
+
+    public void Refresh(AppSettings? settings = null)
+    {
+        LoadEndpoints(settings);
+        _ = CheckAllAsync();
+    }
+
+    private void LoadEndpoints(AppSettings? settings)
+    {
+        var llm = settings?.Llm;
+        if (llm == null)
+            return;
+
+        _ollamaEndpoint = llm.OllamaEndpoint?.TrimEnd('/') ?? "http://localhost:11434";
+        _llmService = llm.Service ?? "Ollama";
+        _llmEndpoint = string.Equals(_llmService, "vLLM", StringComparison.OrdinalIgnoreCase)
+            ? (llm.VllmEndpoint?.TrimEnd('/') ?? "")
+            : _ollamaEndpoint;
+
+        var mcp = llm.McpServers?.FirstOrDefault(s => s.Enabled && !string.IsNullOrWhiteSpace(s.Url));
+        if (mcp != null)
+        {
+            McpName = mcp.Name;
+            _mcpEndpoint = mcp.Url?.TrimEnd('/') ?? "";
+        }
+        else
+        {
+            McpName = "MCP";
+            _mcpEndpoint = "";
+        }
+    }
+
+    private async Task CheckAllAsync()
+    {
+        var ollamaTask = PingAsync(_ollamaEndpoint + "/api/version");
+        var llmTask = string.IsNullOrEmpty(_llmEndpoint) || _llmEndpoint == _ollamaEndpoint
+            ? ollamaTask
+            : PingAsync(_llmEndpoint);
+        var mcpTask = string.IsNullOrEmpty(_mcpEndpoint)
+            ? Task.FromResult(false)
+            : PingAsync(_mcpEndpoint);
+
+        await Task.WhenAll(ollamaTask, llmTask, mcpTask).ConfigureAwait(false);
+
+        var changed = OllamaOnline != ollamaTask.Result ||
+                      LlmOnline != llmTask.Result ||
+                      McpOnline != mcpTask.Result;
+
+        OllamaOnline = ollamaTask.Result;
+        LlmOnline = llmTask.Result;
+        McpOnline = mcpTask.Result;
+
+        if (changed)
+            StatusChanged?.Invoke(this, EventArgs.Empty);
+    }
+
+    private static async Task<bool> PingAsync(string url)
+    {
+        if (string.IsNullOrWhiteSpace(url))
+            return false;
+
+        try
+        {
+            var resp = await Http.GetAsync(url).ConfigureAwait(false);
+            return resp.IsSuccessStatusCode || (int)resp.StatusCode < 500;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}