fix: filter invalid subtitle action links

tests/test_subtitle_links.py

@@ -0,0 +1,45 @@
+from lxml import etree
+
+from app.modules.subtitle import SubtitleModule
+
+
+def test_parse_subtitle_links_filters_detail_page_action_links():
+    html_text = """
+    <tr>
+      <td class="rowhead" valign="top">字幕</td>
+      <td class="rowfollow" align="left" valign="top">
+        <table border="0" cellspacing="0">
+          <tbody>
+            <tr>
+              <td class="embedded">
+                <img border="0" src="pic/flag/china.gif" alt="简体中文" title="简体中文">
+              </td>
+              <td class="embedded">
+                <a href="downloadsubs.php?torrentid=621182&amp;subid=2148">
+                  <u>[雪飘+白恋] 光之美少女 All Stars NewStage：未来的朋友</u>
+                </a>
+              </td>
+            </tr>
+          </tbody>
+        </table>
+        <form method="post" action="subtitles.php">
+          <a href="javascript:void(0)" onclick="this.closest(&quot;form&quot;).submit()">上传字幕</a>
+        </form>
+        <form method="get" action="http://shooter.cn/sub/" target="_blank">
+          <a href="javascript:void(0)" onclick="this.closest(&quot;form&quot;).submit()">搜索射手网</a>
+        </form>
+        <form method="get" action="https://www.opensubtitles.org/en/search2/" target="_blank">
+          <a href="javascript:void(0)" onclick="this.closest('form').submit()">搜索Opensubtitles</a>
+        </form>
+      </td>
+    </tr>
+    """
+    html = etree.HTML(html_text)
+
+    links = SubtitleModule._parse_subtitle_links(
+        html, "https://audiences.me/details.php?id=599860&hit=1"
+    )
+
+    assert links == [
+        "https://audiences.me/downloadsubs.php?torrentid=621182&subid=2148"
+    ]