fix: add admin collection start route

src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Start.cshtml

@@ -0,0 +1,30 @@
+@page
+@model QuantEngine.Web.Pages.Admin.Collection.StartModel
+@{
+    ViewData["Title"] = "수집 시작";
+}
+
+<div class="page-header d-print-none">
+    <div class="row align-items-center">
+        <div class="col">
+            <h2 class="page-title">데이터 수집 시작</h2>
+            <div class="text-muted">Hangfire 백그라운드 작업으로 수집을 시작합니다.</div>
+        </div>
+    </div>
+</div>
+
+<div class="card">
+    <div class="card-body">
+        @if (!string.IsNullOrWhiteSpace(Model.ErrorMessage))
+        {
+            <div class="alert alert-danger">@Model.ErrorMessage</div>
+            <a href="/Admin/Collection" class="btn btn-secondary">목록으로</a>
+        }
+        else
+        {
+            <div class="alert alert-success">수집 작업이 등록되었습니다. 실행 ID: <code>@Model.RunId</code></div>
+            <a href="/Admin/Collection/Detail?runId=@Uri.EscapeDataString(Model.RunId!)" class="btn btn-primary">실행 상세 보기</a>
+            <a href="/Admin/Collection" class="btn btn-secondary">목록으로</a>
+        }
+    </div>
+</div>

src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Start.cshtml.cs

@@ -0,0 +1,48 @@
+using Hangfire;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using QuantEngine.Application.Interfaces;
+using QuantEngine.Web.Services;
+
+namespace QuantEngine.Web.Pages.Admin.Collection;
+
+[Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
+public class StartModel : PageModel
+{
+    private readonly IBackgroundJobClient _jobClient;
+    private readonly IConfiguration _configuration;
+    private readonly ILogger<StartModel> _logger;
+
+    public string? RunId { get; private set; }
+    public string? ErrorMessage { get; private set; }
+
+    public StartModel(
+        IBackgroundJobClient jobClient,
+        IConfiguration configuration,
+        ILogger<StartModel> logger)
+    {
+        _jobClient = jobClient;
+        _configuration = configuration;
+        _logger = logger;
+    }
+
+    public void OnGet()
+    {
+        try
+        {
+            RunId = $"admin-{DateTime.Now:yyyyMMdd-HHmmss}";
+            var accountMode = _configuration["Kis:AccountMode"] ?? "mock";
+            var tickers = new[] { "005930", "000660", "051910", "005380", "010140", "005490" }.ToList();
+
+            _jobClient.Enqueue<ICollectionOrchestrator>(orchestrator =>
+                orchestrator.RunCollectionAsync(RunId!, accountMode, tickers));
+
+            _logger.LogInformation("Collection run {RunId} enqueued from admin page", RunId);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to enqueue collection run from admin page");
+            ErrorMessage = "수집 작업을 등록하지 못했습니다. Hangfire 상태와 서버 로그를 확인하세요.";
+        }
+    }
+}