feat(panel): homepage shows in-progress harvests

栏目列表 now surfaces running harvests: top banner (⟳ 正在采集: <sources>,
browsers stay open until finish), per-row 运行中 badge above 最近运行,
and 30s auto-refresh while any harvest is active — previously an
in-flight run was invisible until its .last.log landed.

web/app.py

@@ -563,6 +563,7 @@ def _active_harvests():
 @require_auth
 def index():
     sources = get_source_list()
+    active = set(_active_harvests())
     # 合并已安装但未建调度的技能源(可通过开关开启,开启时自动错峰创建调度)
     scheduled = {s["source"] for s in sources}
     for row in pl.source_rows(LOG_DIR):
@@ -613,7 +614,7 @@ def index():
             else:
                 flash(f"每日汇总失败 (exit {digest_status['rc']})\n{digest_status['stdout']}\n{digest_status['stderr']}", "error")
 
-    return render_template("index.html", sources=sources,
+    return render_template("index.html", sources=sources, active=active,
                            digest_props=digest_props, digest_run_time=digest_run_time,
                            digest_status=digest_status, auto_refresh=auto_refresh,
                            default_provider=default_provider,

web/templates/index.html

 {% extends "base.html" %}
 {% block title %}News Harvester — 栏目列表{% endblock %}
 {% block extra_head %}
-  {% if auto_refresh %}
-  <meta http-equiv="refresh" content="10">
+  {% if auto_refresh or active %}
+  <meta http-equiv="refresh" content="{{ 10 if auto_refresh else 30 }}">
   {% endif %}
   <style>
   .switch{width:44px;height:24px;border-radius:12px;border:1px solid #2a2d37;background:#3a3d47;position:relative;cursor:pointer;padding:0;transition:background .15s}
@@ -32,6 +32,12 @@
 </div>
 
 <h1>栏目列表 <span style="font-size:14px;color:#666">({{ sources|length }} 个)</span></h1>
+{% if active %}
+<div class="flash" style="border-color:#2ea043">
+  ⟳ 正在采集:{% for a in active|sort %}<strong>{{ a }}</strong>{{ ", " if not loop.last }}{% endfor %}
+  <span style="color:#888;font-size:12px">(结束前浏览器保持打开属正常;页面每 30 秒自动刷新)</span>
+</div>
+{% endif %}
 <div class="table-wrap">
 <table>
   <thead>
@@ -96,6 +102,9 @@
         <span style="color:#666;font-size:12px">下次</span> <span style="color:#e8c34a;font-weight:600">{{ s.next }}</span>
       </td>
       <td>
+        {% if s.source in active %}
+          <span class="badge active">⟳ 运行中</span><br>
+        {% endif %}
         {% if s.log %}
           {% set status_text = s.log.get('status', '') %}
           {{ s.log.mtime }}{% if status_text and '成功' not in status_text and '失败' not in status_text %} · {{ status_text }}{% endif %}